2010 Acura Truck MDX V6-3.7L Page 16

Is there battery voltage?

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?

2010 Acura Truck MDX V6-3.7L Page 116

Is there battery voltage?

YES -

Go to step 30.

NO -

Replace the under-hood fuse/relay box See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and Repair/Under-Hood Fuse/Relay Box

Removal and Installation.?

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

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

Is there battery voltage?

YES -

Go to step 32.

NO -

Repair an open in the wire between the No. 30 (10 A) fuse in the under-dash fuse/relay box and the front blower motor relay.?

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

33. Check for continuity between front blower motor relay 4P socket terminal No. 3 and body ground.

Is there continuity?

YES -

Repair an open in the WHT wire between the front blower motor relay and the blower motor.?

NO -

Check for an open in the wire between the front blower motor relay and body ground. If the wire is OK, check for poor ground at G202.?

2010 Acura Truck MDX V6-3.7L Page 146

Is there battery voltage?

YES -

Replace the power tailgate left pinch sensor.?

NO -

Go to step 10.

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

11. Disconnect power tailgate control unit connector B (20P).

12. Check for continuity between power tailgate control unit connector B (20P) terminal No. 16 and power tailgate left pinch sensor 2P

connector terminal No. 2.

Is there continuity?

YES -

Go to step 13.

NO -

Repair an open in the wire.?

13. Check for continuity between power tailgate control unit connector B (20P) terminal No. 17 and power tailgate left pinch sensor 2P

connector terminal No. 1.

2010 Acura Truck MDX V6-3.7L Page 230

Is there battery voltage?

YES -

Replace the power tilt/telescopic steering control unit.?

NO -

Do the power tilt/telescopic steering control unit input test See: Relays and Modules/Relays and Modules - Steering and Suspension/Relays and

Modules - Steering/Steering Column Control Module/Testing and Inspection.?

B1844

DTC Troubleshooting: B1844

DTC B1844:

Power Seat Slide Switch Circuit Malfunction

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 slide switch in each direction for more than 3 seconds.

4. Check for DTCs with the HDS.

Is DTC B1844 indicated?

YES -

Go to step 5.

NO -

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

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

6. Disconnect power seat control unit connector A (40P).

7. Disconnect the power seat adjustment switch 12P connector.

8. Check for continuity between body ground and power seat control unit connector A (40P) terminals No. 1, No. 7, and No. 27 individually.

2010 Acura Truck MDX V6-3.7L Page 14

Is there battery voltage?

YES -

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

NO -

Repair an open in the wire between the BSI control unit and the branch of the +B TECH (10A) line.?

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

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

12. Disconnect the BSI control unit 16P connector.

13. Check for continuity between BSI control unit 16P connector terminal No. 2 and body ground.

Is there continuity?

YES -

Repair a short to ground in the wire between the BSI control unit and the branch of the BSI-CAN line (BSI-CAN L).?

NO -

Go to step 14.

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

15. Measure the voltage between BSI control unit 16P connector terminal No. 3 and body ground. There should be less than 0.2 V.

Is the voltage as specified?

2010 Acura Truck MDX V6-3.7L Page 4

Is there battery voltage?

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 -

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 between the left BSI radar unit 6P connector and 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.?

B18A8

DTC Troubleshooting: B18A8

DTC B18A8:

Right BSI Radar Unit Voltage Input Low

1. Clear the DTCs with the HDS.

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

3. Check for DTCs with the HDS.

Is DTC B18A8 indicated?

YES -

Go to step 5.

NO -

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

4. Turn the ignition switch to LOCK (0)

2010 Acura Truck MDX V6-3.7L Page 90

Is there battery voltage?

YES -

Go to step 32.

NO -

Repair an open in the wire between the No. 30 (10 A) fuse in the under-dash fuse/relay box and the rear blower motor relay.?

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

33. Check for continuity between rear blower motor relay 4P socket terminal No. 3 and body ground.

Is there continuity?

YES -

Repair an open in the GRY wire between the rear blower motor relay and the blower motor.?

NO -

Check for an open in the wire between the rear blower motor relay and body ground. If the wire is OK, check for poor ground at G304.?

B1225

DTC Troubleshooting: B1225 (A and AUTO)

DTC B1225 or DTC indicator A and AUTO:

An Open in the In-Car Temperature 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 B1225 or A and AUTO indicated?