2010 Acura Truck MDX V6-3.7L Page 240

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the immobilizer-keyless control unit and the gauge

control module.?

5. Check for DTCs with the HDS.

Are DTCs B1061, B1359, B1808, B1956, and U0155 also 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 immobilizer-keyless control unit input test See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and

Inspection/Component Tests and General Diagnostics/Immobilizer-Keyless Control Unit Input Test.?

B1950

DTC Troubleshooting: B1050, B1200, B1250, B1150, B1750, B1900, B1950, B2150, B1800, B1350

DTC B1050:

Communication Circuit Error (BUS-OFF)

DTC B1150:

Communication Circuit Error (BUS-OFF)

DTC B1200:

Communication Circuit Error (BUS-OFF)

DTC B1250:

Communication Circuit Error (BUS-OFF)

DTC B1350:

Communication Circuit Error (BUS-OFF)

DTC B1800:

Communication Circuit Error (BUS-OFF)

DTC B1900:

Communication Circuit Error (BUS-OFF)

DTC B1950:

Communication Circuit Error (BUS-OFF)

DTC B2150:

Communication Circuit Error (BUS-OFF)

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 ON (II).

3. Wait for more than 6 seconds.

4. Check for DTCs with the HDS.

Are DTCs B1050, B1150, B1200, B1250, B1350, B1800, B1900, B1950, and/or B2150 indicated?

2010 Acura Truck MDX V6-3.7L Page 80

Intermittent failure, check for loose wires or poor connections in the climate control unit connector A (40P).?

6. Check for DTCs using the HDS.

Are any of the following DTCs indicated; B1011, B1060,B2160, B1357, B1805, B1408, or B2157?

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 climate control unit troubleshooting See: Heating and Air Conditioning/Control Assembly/Testing and Inspection.?

B1213

DTC Troubleshooting: B1213 (N)

DTC B1213 or DTC indicator N and Mode:

An Open in the Rear Evaporator 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 B1213 or N and Mode indicated?

YES -

Go to step 5.

NO -

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

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

6. Remove the rear evaporator temperature sensor See: Heating and Air Conditioning/Evaporator Temperature Sensor / Switch/Service and

Repair/Rear Evaporator Temperature Sensor Replacement, and test it See: Heating and Air Conditioning/Testing and Inspection/Component

Tests and General Diagnostics/Rear Evaporator Temperature Sensor Test.

Is the rear evaporator temperature sensor OK?

YES -

With the rear evaporator temperature sensor disconnected, go to step 7.

NO -

Replace the rear evaporator temperature sensor See: Heating and Air Conditioning/Evaporator Temperature Sensor / Switch/Service and

Repair/Rear Evaporator Temperature Sensor Replacement.?

7. Disconnect climate control unit connector B (14P).

8. Check for continuity between climate control unit connector B (14P) terminal No. 6 and rear evaporator temperature sensor 2P connector

2010 Acura Truck MDX V6-3.7L Page 36

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

5. Check for DTCs with the HDS.

Is DTC B1011 also indicated with DTC B1032?

YES -

Check for an open in the wire between the MICU and the gauge control module. If the circuit is faulty, repair the open.?

NO -

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.?

B1050

DTC Troubleshooting: B1050, B1200, B1250, B1150, B1750, B1900, B1950, B2150, B1800, B1350

DTC B1050:

Communication Circuit Error (BUS-OFF)

DTC B1150:

Communication Circuit Error (BUS-OFF)

DTC B1200:

Communication Circuit Error (BUS-OFF)

DTC B1250:

Communication Circuit Error (BUS-OFF)

DTC B1350:

Communication Circuit Error (BUS-OFF)

DTC B1800:

Communication Circuit Error (BUS-OFF)

DTC B1900:

Communication Circuit Error (BUS-OFF)

DTC B1950:

Communication Circuit Error (BUS-OFF)

DTC B2150:

Communication Circuit Error (BUS-OFF)

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 ON (II).

3. Wait for more than 6 seconds.

4. Check for DTCs with the HDS.

Are DTCs B1050, B1150, B1200, B1250, B1350, B1800, B1900, B1950, and/or B2150 indicated?

2010 Acura Truck MDX V6-3.7L Page 38

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

B1052

DTC Troubleshooting: B1051, B1052

DTC B1051:

Relay Control Module Internal Error (CPU error)

DTC B1052:

Relay Control Module Internal Error (EEPROM error)

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 DTC B1051 or B1052 indicated?

YES -

Faulty relay control module, 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.?

NO -

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

B1055

DTC Troubleshooting: B1055, B1056, B1057

DTC B1055:

Relay Control Module Lost Communication with MICU (MICU Message)

DTC B1056:

Relay Control Module Lost Communication with MICU (ALARM Message)

DTC B1057:

Relay Control Module Lost Communication with MICU (DOORSW 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 DTC B1055, B1056, or B1057 indicated?

2010 Acura Truck MDX V6-3.7L Page 26

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

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

5. Disconnect the right BSI alert indicator 2P connector.

6. Measure the resistance between right BSI alert indicator 2P connector terminal No. 1 and body ground. There should be less than 1.0 Ohms.

Is the resistance as specified?

YES -

Go to step 7.

NO -

Repair an open in the wire between the right BSI alert indicator and body ground (G507).?

7. Turn the ignition switch to ON (II), and within 3 seconds measure the voltage between right BSI alert indicator 2P connector terminals No. 1

and No. 2.

Does the voltage remain between 12 V and 1 V for 3 seconds after turning the ignition switch to ON (II), then go down to 0 V?

YES -

Replace the right BSI alert indicator.?

NO -

Go to step 8.

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

9. Disconnect the BSI control unit 16P connector.

10. Measure the resistance between right BSI alert indicator 2P connector terminal No. 2 and body ground. There should be an open circuit or at

2010 Acura Truck MDX V6-3.7L Page 39

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

5. Check for DTCs with the HDS.

Are DTCs B1055, B1056, B1057, B1157, B1159, B1255, B1355, B1806, B1811, B1955, B2155, and B2161 all indicated?

YES -

Do the MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests

and General Diagnostics/MICU Input Test.?

NO -

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

B1056

DTC Troubleshooting: B1055, B1056, B1057

DTC B1055:

Relay Control Module Lost Communication with MICU (MICU Message)

DTC B1056:

Relay Control Module Lost Communication with MICU (ALARM Message)

DTC B1057:

Relay Control Module Lost Communication with MICU (DOORSW 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 DTC B1055, B1056, or B1057 indicated?

YES -

Go to step 5.

NO -

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

5. Check for DTCs with the HDS.

Are DTCs B1055, B1056, B1057, B1157, B1159, B1255, B1355, B1806, B1811, B1955, B2155, and B2161 all indicated?

YES -

Do the MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests

and General Diagnostics/MICU Input Test.?

NO -

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

B1057

DTC Troubleshooting: B1055, B1056, B1057

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

unit.?

5. Check for DTCs with the HDS.

Are DTCs B1007, B1062, B1063, B1155, B1156, B1957, B1958, and/or 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 rear MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component

Tests and General Diagnostics/Rear MICU Input Test.?

B1959

DTC Troubleshooting: B1959

DTC B1959:

Rear MICU Lost Communication with Relay Control Module (RM 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 DTC B1959 indicated?

YES -

Go to step 5.

NO -

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

5. Check for DTCs with the HDS.

Are DTCs B1005, B1158, B1959, B2162, and/or B2970 all indicated?

YES -

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

NO -

Do the rear MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component

Tests and General Diagnostics/Rear MICU Input Test.?

B2150

DTC Troubleshooting: B1050, B1200, B1250, B1150, B1750, B1900, B1950, B2150, B1800, B1350

DTC B1050:

Communication Circuit Error (BUS-OFF)

DTC B1150:

Communication Circuit Error (BUS-OFF)