2010 Acura Truck MDX V6-3.7L Page 96

YES -

Repair a short in the wires between the climate control unit and the outside air temperature sensor.?

NO -

Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit See:

Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?

B1229

DTC Troubleshooting: B1229 (E and AUTO)

DTC B1229 or DTC indicator E and AUTO:

An Open in the Sunlight Sensor Circuit

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Do the self-diagnostic function with the HDS or the climate control unit.

4. Check for DTCs.

Is DTC B1229 or E and AUTO indicated?

YES -

Go to step 5.

NO -

Intermittent failure, check for loose wires or poor connections in the sunlight sensor circuit.?

5. Turn the ignition switch to LOCK (0).

6. Disconnect the sunlight sensor 5P connector.

7. Disconnect climate control unit connector A (40P).

8. Check for continuity between climate control unit connector A (40P) terminal No. 29 and sunlight sensor 5P connector terminal No. 4.

Is there continuity?

YES -

Go to step 9.

NO -

Repair an open in the wire between the climate control unit and the sunlight sensor.?

9. Check for continuity between climate control unit connector A (40P) terminal No. 8 and sunlight sensor 5P connector terminal No. 2.

2010 Acura Truck MDX V6-3.7L Page 22

YES -

Go to step 28.

NO -

Go to step 31.

28. Turn the ignition switch to LOCK (0).

29. Disconnect the BSI control unit 16P connector.

30. Check for continuity between BSI control unit 16P connector terminal No. 3 and left BSI radar unit 6P connector terminal No. 3, and

between BSI control unit 16P connector terminal No. 2 and left BSI radar unit 6P connector terminal No. 1.

Is there continuity?

YES -

Replace the left BSI radar unit See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Blind Spot

Module/Service and Repair/BSI Radar Unit Removal/Installation.?

NO -

Repair an open in the wire between the BSI control unit and the left BSI radar unit.?

31. Measure the voltage between left BSI radar unit 6P connector terminal No. 2 and body ground. There should be battery voltage.

Is there battery voltage?

YES -

Repair an open in the wire between the left BSI radar unit and body ground (G702).?

NO -

Repair an open in the wire between the tech relay in the auxiliary under-hood fuse/relay box and the left BSI radar unit.?

32. Turn the ignition switch to LOCK (0).

33. Disconnect the right BSI radar unit 6P connector.

34. Turn the ignition switch to ON (II), then wait for 10 seconds.

2010 Acura Truck MDX V6-3.7L Page 293

YES -

Go to step 16.

NO -

Go to step 6.

6. Turn the ignition switch to LOCK (0).

7. Disconnect the A/C pressure sensor 3P connector.

8. Disconnect climate control unit connector A (40P).

9. Check for continuity between body ground and climate control unit connector A (40P) terminal No. 26.

Is there continuity?

YES -

Repair a short to body ground in the wire between the climate control unit and the A/C pressure sensor.?

NO -

Go to step 10.

10. Check for continuity between climate control unit connector A (40P) terminals No. 6 and No. 26.

Is there continuity?

YES -

Repair a short in the wires.?

NO -

Go to step 11.

11. Turn the ignition switch to ON (II), and measure the voltage between body ground and climate control unit connector A (40P) terminal No.

2010 Acura Truck MDX V6-3.7L Page 115

YES -

Repair a short to power in the wire(s).?

NO -

Go to step 22.

22. Reconnect climate control unit connector A (40P).

23. Test the front power transistor See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General Diagnostics/Front

Blower Power Transistor Test.

Is the front power transistor OK?

YES -

Check for loose wires or poor connections at climate control unit connector A (40P) and at the front power transistor 4P connector. If the

connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate

control unit See: Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?

NO -

Replace the front power transistor See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General Diagnostics/Front

Blower Power Transistor Test.?

24. Disconnect the jumper wire.

25. Disconnect the front blower motor 2P connector.

26. Measure the voltage between front blower motor 2P connector terminal No. 1 and body ground.

Is there battery voltage?

YES -

Replace the front blower motor See: Heating and Air Conditioning/Blower Motor/Service and Repair/Blower Unit Component Replacement.?

NO -

Go to step 27.

27. Turn the ignition switch to LOCK (0).

28. Remove the front blower motor relay from the relay block, and test it See: Power and Ground Distribution/Testing and Inspection/Power

Relay Test.

Is the relay OK?

YES -

Go to step 29.

NO -

Replace the front blower motor relay.?

29. Measure the voltage between front blower motor relay 4P socket terminal No. 1 and body ground.

2010 Acura Truck MDX V6-3.7L Page 112

YES -

Repair a short to body ground in the wire(s) between the climate control unit and the front mode control motor.?

NO -

Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit See:

Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?

B1241

DTC Troubleshooting: B1241 (C and MODE)

DTC B1241 or DTC indicator C and MODE:

A Problem in the Front Blower Motor Circuit

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Do the self-diagnostic function with the HDS or the climate control unit.

4. Check for DTCs.

Is DTC B1241 or C and MODE indicated?

YES -

Go to step 5.

NO -

Intermittent failure, check for loose wires or poor connections in the front blower motor circuit.?

5. Turn the ignition switch to LOCK (0).

6. Check the No. 12 (40 A) fuse in the relay block, and the No. 30 (10 A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES -

Go to step 7.

NO -

Replace the fuse(s), and recheck. If fuse(s) blow again, check for a short in the No. 12 (40 A) and No. 30 (10 A) fuse(s) circuit.?

7. Connect front blower motor 2P connector terminal No. 2 to body ground with a jumper wire.

8. Turn the ignition switch to ON (II).

Does the front blower motor run at high speed?

2010 Acura Truck MDX V6-3.7L Page 183

YES -

Repair a short to power in the BLU wire.?

NO -

Go to step 11.

11. Turn the ignition switch to LOCK (0).

12. Check for continuity between HandsFreeLink control unit 28P connector terminal No. 2 and dashboard wire harness 20P connector terminal

No. 5.

Is there continuity?

YES -

Go to step 13.

NO -

Repair an open in the wire between the cable reel and the HandsFreeLink control unit.?

13. Check for continuity between audio-navigation unit connector A (24P) terminal No. 5 and dashboard wire harness 20P connector terminal

No. 19.

Is there continuity?

YES -

Check for loose or poor connections at the audio-navigation unit, HandsFreeLink control unit, and HFL-navigation voice control switch. If the

connections are OK, substitute a known-good HandsFreeLink control unit See: Accessories and Optional Equipment/Cellular

Phone/Communications Control Module/Service and Repair. If the symptom/indication goes away, replace the original HandsFreeLink control unit

See: Accessories and Optional Equipment/Cellular Phone/Communications Control Module/Service and Repair. If the symptom is still present,

replace the cable reel See: Restraints and Safety Systems/Air Bag Systems/Clockspring Assembly / Spiral Cable/Service and Repair.?

2010 Acura Truck MDX V6-3.7L Page 12

YES -

Intermittent failure due to temporary contamination around the rear bumper, the system is OK at this time. Clear the DTCs.?

NO -

Install the sensor cover properly. If it is damaged, replace it.?

B18B5

DTC Troubleshooting: B18B5

DTC B18B5:

Right BSI Radar Unit Dirty

1. Check the outside of rear bumper for snow, ice, dirt, contaminants, or stickers.

2. Remove the bolts on rear bumper wheel arch See: Body and Frame/Bumper/Rear Bumper/Service and Repair. Gently pull on the rear

bumper (A) at the wheel arch areas to release it from the hooks (B) on the side spacers (C). Do not pull the rear bumper forcibly.

3. Check the inside of rear bumper for snow, ice, dirt, or contaminants. Also, check the BSI radar unit surface for dirt or contaminants.

Is it OK?

YES -

Intermittent failure due to temporary contamination around the rear bumper, the system is OK at this time. Clear the DTCs.?

NO -

Go to step 4.

4. Remove the rear bumper, and wipe off any dirt or contaminants.

5. Check the sensor cover for proper installation.

Is it OK?

YES -

Intermittent failure due to temporary contamination around the rear bumper, the system is OK at this time. Clear the DTCs.?

NO -

Install the sensor cover properly. If it is damaged, replace it.?

B18B6

DTC Troubleshooting: B18B6, B18B7

DTC B18B6:

Lost Communication with Left BSI Radar Unit

2010 Acura Truck MDX V6-3.7L Page 168

YES -

Go to step 12.

NO -

Repair an open in the wire.?

12. Measure the voltage between power tailgate control unit connector B (20P) terminal No. 12 and body ground.

Is there battery voltage?

YES -

Go to step 13.

NO -

Check the No. 6 (20 A) fuse in the rear fuse/relay box. If the fuse is OK, check for an open in the wire between the rear fuse/relay box and power

tailgate control unit.?

13. Disconnect power tailgate control unit connector A (5P).

14. Check for continuity between power tailgate control unit connector A (5P) terminal No. 4 and body ground.

Is there continuity?

YES -

Go to step 15.

NO -

Repair an open in the wire or poor ground (G701).?

15. Turn the tailgate lock latch to the fully-closed position using a screwdriver.

16. Reconnect the power tailgate closer motor 2P connector.

17. Connect battery power to power tailgate control unit connector B (20P) terminal No. 2 (or No. 1) and ground terminal No. 1 (or No. 2)

2010 Acura Truck MDX V6-3.7L Page 147

YES -

Replace the power tailgate control unit.?

NO -

Repair an open in the wire.?

B1380

DTC Troubleshooting: B1380

DTC B1380:

Power Tailgate Closer Unit Neutral Switch Circuit Malfunction

1. Open the tailgate with the tailgate outer handle.

2. Close the tailgate manually.

3. Turn the ignition switch to LOCK (0) and then back to ON (II).

4. Clear the DTCs with the HDS.

5. Check for DTCs with the HDS.

Is DTC B1380 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power tailgate control unit and the power

tailgate closer unit.?

6. Open the tailgate with the power tailgate outer handle.

7. Turn the ignition switch to LOCK (0).

8. Disconnect the 6P connector from the power tailgate closer unit.

9. Check for continuity between power tailgate closer unit 6P connector terminals No. 1 and No. 5.

Is there continuity?

YES -

Faulty neutral switch, replace the power tailgate closer unit.?

NO -

Go to step 10.

10. Check for continuity between power tailgate closer unit 6P connector terminal No. 5 and body ground.

2010 Acura Truck MDX V6-3.7L Page 223

YES -

Go to step 9.

NO -

Go to step 26.

9. Turn the ignition switch to LOCK (0).

10. Disconnect power tilt/telescopic steering control unit connector A (16P).

11. Disconnect the power telescopic motor/position sensor 6P connector.

12. Check for continuity between power tilt/telescopic steering control unit connector A (16P) terminals No. 5,No. 13, and No. 16 and power

telescopic motor/position sensor 6P connector terminals No. 4, No. 5, and No. 6 respectively.

Is there continuity?

YES -

Go to step 13.

NO -

Repair an open in the wire.?

13. Check for continuity between body ground and power tilt/telescopic steering control unit connector A (16P) terminals No. 5 and No. 13

individually.

Is there continuity?

YES -

Repair a short to ground in the wire.?

2010 Acura Truck MDX V6-3.7L Page 200

YES -

Go to step 21.

NO -

Repair an open in the wire.?

21. Disconnect the 4P connector from the slide position sensor and the rear up-down position sensor, then disconnect the driver's seat wire

harness 8P [14P] connector.

[ ]: With seat ventilation

22. Check for continuity between body ground and front up-down position sensor 4P connector terminal No. 1.

Is there continuity?

YES -

Repair a short to ground in the wire.?

NO -

Go to step 23.

23. Reconnect power seat control unit connector A (40P).

24. Turn the ignition switch to ON (II).

25. Measure the voltage between power seat control unit connector A (40P) terminals No. 15 and No. 29.

Is there battery voltage when the front up-down switch is operated?

YES -

Replace the front up-down motor/position sensor.?

NO -

Replace the power seat control unit.?

26. Turn the ignition switch to LOCK (0).

27. Disconnect power seat control unit connector B (18P).

28. Disconnect the front up-down motor 2P connector.

29. Check for continuity between power seat control unit connector B (18P) terminals No. 6 and No. 16 and front up-down motor 2P

connector terminals No. 1 and No. 2 respectively.

2010 Acura Truck MDX V6-3.7L Page 257

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.?

5. Open and close the front passenger's power window by using the power window master switch manually.

Does the power window motor operate?

YES -

Go to step 6.

NO -

Do the front passenger's power window motor test See: Windows and Glass/Windows/Power Window Motor/Testing and Inspection/Front

Passenger's Power Window Motor Test.?

6. Select the POWER WINDOWS from the BODY ELECTRICAL SYSTEM SELECT menu and enter the DATA LIST.

7. Check the DETECT/NONE information of the Front passenger's window motor A-phase pulse signal in the DATA LIST.

Does the information indicator display DETECT while the power window is moving, and display NONE when the power window is stopped?

YES -

Replace the front passenger's MPCS unit.?

NO -

Go to step 8.

8. Check for DTCs with the HDS.

Is DTC B2178 also indicated?

YES -

Go to step 15.

NO -

Go to step 9.

9. Turn the ignition switch to LOCK (0).

10. Disconnect front passenger's MPCS unit connector B (14P).

11. Disconnect the 6P connector from the passenger's power window motor.

12. Check for continuity between front passenger's MPCS unit connector B (14P) terminal No. 5 and front passenger's power window motor 6P

connector terminal No. 3.

2010 Acura Truck MDX V6-3.7L Page 17

YES -

Repair an open in the wire between the left BSI radar unit and body ground (G702).?

NO -

Repair an open in the wire between the tech relay in the auxiliary under-hood fuse/relay box and the left BSI radar unit.?

32. Turn the ignition switch to LOCK (0).

33. Disconnect the right BSI radar unit 6P connector.

34. Turn the ignition switch to ON (II), then wait for 10 seconds.

35. Measure the voltage between right BSI radar unit 6P connector terminals No. 2 and No. 5. There should be battery voltage.

Is there battery voltage?

YES -

Go to step 36.

NO -

Go to step 41.

36. Turn the ignition switch to LOCK (0).

37. Measure the resistance between body ground and right BSI radar unit 6P connector terminals No. 4 and No. 6 individually. There should be

less than 1.0 Ohms.

Is the resistance as specified?

YES -

Go to step 38.

NO -

Repair an open in the wire between the right BSI radar unit and body ground (G702).?

38. Make sure the ignition switch in LOCK (0).

39. Disconnect the BSI control unit 16P connector.

40. Check for continuity between BSI control unit 16P connector terminal No. 3 and right BSI radar unit 6P connector terminal No. 3, and

between BSI control unit 16P connector terminal No. 2 and right BSI radar unit 6P connector terminal No. 1.

2010 Acura Truck MDX V6-3.7L Page 63

YES -

Go to and troubleshoot the indicated DTCs, then recheck.

NO -

Go to step 6.

6. Turn the ignition switch to LOCK (0).

7. Disconnect gauge control module connector A (12P).

8. Disconnect the VSA modulator-control unit 46P connector.

9. Check for continuity between VSA modulator-control unit 46P connector terminals No. 38 and No. 39 and gauge control module connector

A (12P) connector terminals No. 6 and No. 12 respectively.

Is there continuity?

YES -

Update the VSA modulator-control unit if it does not have the latest software See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Traction Control Module/Testing and Inspection, or substitute a known-good VSA modulator-control unit See: Brakes and Traction

Control/Antilock Brakes / Traction Control Systems/Traction Control Module/Service and Repair, and recheck. If the indication goes away, replace

the original VSA modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Traction Control

Module/Service and Repair. If the DTC is still present, replace the gauge control module See: Instrument Panel, Gauges and Warning

Indicators/Instrument Cluster / Carrier/Service and Repair.?

NO -

Repair an open in the wire.?

B1171

DTC Troubleshooting: B1171

DTC B1171:

Gauge Control Module Lost Communication with Adaptive Cruise Control Unit (ACC Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Wait for at least 6 seconds.

2010 Acura Truck MDX V6-3.7L Page 43

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the relay control module and the combination

switch control unit.?

5. Check for DTCs with the HDS.

Are DTCs B1007, B1062, B1063, B1155, B1156, B1957, B1958, and B2969 all indicated?

YES -

Do the combination switch control unit input test See: Wiper and Washer Systems/Testing and Inspection/Wiper/Washer Switch (Combination

Switch Control Unit) Input Test.?

NO -

Do the relay control module input test See: Power and Ground Distribution/Testing and Inspection/Relay Control Module Input Test.?

B1065

DTC Troubleshooting: B1065

DTC B1065:

Relay Control Module Lost Communication with Driver's MPCS Unit (DRLOCKSW Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTCs B1065 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the relay control module and the driver's MPCS

unit.?

5. Check for DTCs with the HDS.

Are DTCs B1015, B1065, B1182, B1356, and B1905 all indicated?

YES -

Do the driver's MPCS unit input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and

Inspection/Component Tests and General Diagnostics/Drivers MPCS Unit Input Test.?

NO -

Do the relay control module input test See: Power and Ground Distribution/Testing and Inspection/Relay Control Module Input Test.?

B1075

DTC Troubleshooting: B1075

2010 Acura Truck MDX V6-3.7L Page 10

YES -

Replace the right BSI radar unit See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Blind Spot

Module/Service and Repair/BSI Radar Unit Removal/Installation.?

NO -

Replace the left BSI radar unit See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Blind Spot

Module/Service and Repair/BSI Radar Unit Removal/Installation.?

B18BD

DTC Troubleshooting: B18BD

DTC B18BD:

BSI Control Unit Voltage Input High

NOTE: This DTC may be indicated due a fault in the charging system including the battery.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to ON (II), then wait 20 seconds.

3. Check for DTCs with the HDS.

Is DTC B18BD indicated?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time.?

4. Test the 12 V-battery.

Is the battery OK?

YES -

Replace the BSI control unit.?

NO -

Replace with the 12 V-battery.?

B18BE

DTC Troubleshooting: B18BE

DTC B18BE:

BSI Control Unit Voltage Input Low

1. Clear the DTCs with the HDS.

2. Start the engine, then wait for 30 seconds.

3. Check for DTCs with the HDS.

Is DTC B18BE indicated?

YES -

Check the connection between the BSI connector and the BSI control unit. If the connection is OK, check the battery.?

NO -

Intermittent failure, the system is OK at this time.?

2010 Acura Truck MDX V6-3.7L Page 50

YES -

Replace the relay control module.?

NO -

Repair an open in the BLK wire or poor ground (G201-right side, G301-left side).?

B1079

DTC Troubleshooting: B1078, B1079

DTC B1078:

Daytime Running Lights System Error (Canada)

DTC B1079:

Daytime Running Lights System Error (USA)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Turn the headlight switch OFF, and apply the parking brake.

2. Turn the ignition switch to ON (II).

3. Clear the DTCs with the HDS.

4. Release the parking brake.

5. Turn the ignition switch to LOCK (0) and then back to ON (II).

6. Check for DTCs with the HDS.

Is DTC B1078 or B1079 indicated?

YES -

Go to step 7.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.?

7. Turn the ignition and headlight switches OFF.

8. Check the No. 1 (10 A) and No. 2 (10 A) fuses in the under-hood fuse/relay box.

Are the fuses OK?

YES -

Go to step 9.

NO -

Replace the blown fuse and recheck. If the fuse blows again, repair short in the wire between the under-hood fuse/relay box and the appropriate

daytime running lights.?

9. Check the daytime running light bulbs.

Are the daytime running light bulbs OK?

YES -

Go to step 10.

NO -

Replace the faulty bulb.?

2010 Acura Truck MDX V6-3.7L Page 217

YES -

Go to step 11.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.?

11. Check for DTCs with the HDS.

Are any DTCs other than B1837 indicated?

YES -

Go to the indicated DTC's troubleshooting.?

NO -

Go to step 12.

12. Clear the DTCs with the HDS, and wait for 6 seconds.

13. Move the motors shown one at a time, and check the operation time.

- Steering tilt motor up and down

- Steering telescopic motor pulled and pushed

- Power mirror actuator (up, down, left, right)

- Power seat (slide forward/backward, recline forward/backward, front up-down, rear up-down)

Does any motor fail to run smoothly?

YES -

Go to the failed motor test:

- Power tilt/telescopic motor test See: Steering and Suspension/Steering/Steering Column/Tilt Wheel Motor/Testing and Inspection.

- Power mirror actuator test See: Body and Frame/Mirrors/Testing and Inspection/Power Mirror Actuator Test.

- Power seat motor test See: Body and Frame/Seats/Power Seat Motor/Testing and Inspection/Driver's Power Seat Motor Test.

If the motor is OK, check the engagement of the motor gear.?

NO -

Go to the each input test:

- Power seat control unit input test See: Body and Frame/Relays and Modules - Body and Frame/Power Seat Control Module/Testing and

- PInoswpecr ttiioltn//tPeloewsceorp Sice astt eCeorinntgro cl oUnntriot lI nupnuitt iTnepsutt. ?test See: Relays and Modules/Relays and Modules - Steering and Suspension/Relays and

- DMroivdeurl'ess M - PSCteSer uinngit/ Sintepeurti ntegs Ct oSleuem: nP oCwoenrttrroali nM Modaunlaeg/Temesetnint/gC aonmd pIuntsepresc atinodn C.?ontrol Systems/Information Bus/Testing and

Inspection/Component Tests and General Diagnostics/Power Windows (Drivers MPCS Unit) Input Test.?

B1840

DTC Troubleshooting: B1840

DTC B1840:

Tilt Motor Pulse Error

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Operate the tilt switch in each direction for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1840 indicated?

2010 Acura Truck MDX V6-3.7L Page 19

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time.?

4. Check for DTCs with the HDS.

Are DTC B18B6 and B18B7 indicated?

YES -

Go to step 5.

NO -

- Only DTC B18B6 is indicated, go to step 24.

- Only DTC B18B7 is indicated, go to step 32.

5. Turn the ignition switch to LOCK (0).

6. Disconnect the left BSI radar unit 6P connector.

7. Turn the ignition switch to ON (II).

8. Measure the voltage between left BSI radar unit 6P connector terminals No. 2 and No. 5. There should be battery voltage.

Is there battery voltage?

YES -

Go to step 10.

NO -

Go to step 9.

9. Measure the voltage between left BSI radar unit 6P connector terminal No. 2 and body ground. There should be battery voltage.

Is there battery voltage?

YES -

Repair an open in the wire or poor ground (G702).?

2010 Acura Truck MDX V6-3.7L Page 41

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the relay control module and the gauge control

module.?

5. Check for DTCs with the HDS.

Are DTCs B1011, B1060, B1061, B1205, B1357, B1359, B1805, B1808, B1906, B1956, B2160, and U0155 all indicated?

YES -

Do the gauge control module input test See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and

General Diagnostics/Gauge Control Module Input Test.?

NO -

Do the relay control module input test See: Power and Ground Distribution/Testing and Inspection/Relay Control Module Input Test.?

B1061

DTC Troubleshooting: B1060, B1061

DTC B1060:

Relay Control Module Lost Communication with Gauge Control Module (VSP/NE Message)

DTC B1061:

Relay Control Module Lost Communication with Gauge Control Module (A/T Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Are DTCs B1060 and/or B1061 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the relay control module and the gauge control

module.?

5. Check for DTCs with the HDS.

Are DTCs B1011, B1060, B1061, B1205, B1357, B1359, B1805, B1808, B1906, B1956, B2160, and U0155 all indicated?

YES -

Do the gauge control module input test See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and

General Diagnostics/Gauge Control Module Input Test.?

NO -

Do the relay control module input test See: Power and Ground Distribution/Testing and Inspection/Relay Control Module Input Test.?