2010 Acura Truck MDX V6-3.7L Page 145

Is there continuity?

YES -

Replace the power tailgate control unit.?

NO -

Repair an open in the wire.?

B1379

DTC Troubleshooting: B1379

DTC B1379:

Power Tailgate Left Pinch Sensor Circuit Malfunction

1. Open the tailgate manually or with the keyless transmitter.

2. Close the tailgate with the keyless transmitter or driver's door power tailgate switch.

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 B1379 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 left pinch sensor.?

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

7. Disconnect the 2P connector from the power tailgate left pinch sensor.

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

9. Measure the voltage between harness side of power tailgate left pinch sensor 2P connector terminals No. 2 (+) and No. 1 (-).

2010 Acura Truck MDX V6-3.7L Page 67

Is there continuity?

YES -

Go to step 10.

NO -

Repair an open in the wire between the gauge control module and the fuel tank unit.?

10. Do the fuel gauge sending unit test See: Instrument Panel, Gauges and Warning Indicators/Fuel Gauge Sender/Testing and Inspection.

Is the fuel tank unit OK?

YES -

Replace the gauge control module.?

NO -

Replace the fuel gauge sending unit.?

B1176

DTC Troubleshooting: B1176

DTC B1176:

Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Short

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 30 seconds.

4. Check for DTCs with the HDS.

Is DTCs B1176 indicated?

2010 Acura Truck MDX V6-3.7L Page 201

Is there continuity?

YES -

Go to step 30.

NO -

Repair an open in the wire.?

30. Check for continuity between body ground and front up-down motor 2P connector terminals No. 1 and No. 2 individually.

Is there continuity?

YES -

Repair a short to ground in the wire.?

NO -

Go to step 31.

31. Do the front up-down motor test See: Body and Frame/Seats/Power Seat Motor/Testing and Inspection/Driver's Power Seat Motor Test.

Is the motor OK?

YES -

Replace the power seat control unit.?

NO -

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

B1827

DTC Troubleshooting: B1827

DTC B1827:

Power Seat Rear Up-down 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. Turn the ignition switch to LOCK (0) and then back to ON (II).

2010 Acura Truck MDX V6-3.7L Page 151

Is there continuity?

YES -

Repair a short to ground in the wire.?

NO -

Go to step 14.

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

15. Connect battery power to the power tailgate control unit connector B (20P) terminal No. 1 and ground terminal No. 2 momentarily. (The

motor should run in the release direction.)

16. Reconnect the 6P connector to the power tailgate closer unit.

17. Check for continuity between power tailgate control unit connector C (14P) terminals No. 4 and No. 11.

Is there continuity?

YES -

Replace the power tailgate control unit.?

NO -

Go to step 18.

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

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

2010 Acura Truck MDX V6-3.7L Page 225

Is there continuity?

YES -

Repair a short to ground in the wire.?

NO -

Go to step 23.

23. Reconnect power tilt/telescopic steering control unit connector A (16P).

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

25. Measure the voltage between power tilt/telescopic steering control unit connector A (16P) terminals No. 2 and No. 16.

Is there battery voltage when the telescopic switch is operated?

YES -

Faulty power telescopic motor/position sensor, replace the telescopic motor assembly.?

NO -

Replace the power tilt/telescopic steering control unit.?

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

27. Disconnect power tilt/telescopic steering control unit connector B (8P).

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

29. Check for continuity between power tilt/telescopic steering control unit connector B (8P) terminals No. 4 and No. 6 and power telescopic

motor/position sensor 6P connector terminals No. 1 and No. 2 respectively.

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Is there continuity?

YES -

Repair a short in the wire.?

NO -

Go to step 10.

10. Do the power seat adjustment switch test See: Body and Frame/Seats/Power Seat Switch/Service and Repair/Power Seat Adjustment Switch

Test/Replacement.

Is the switch OK?

YES -

Replace the power seat control unit.?

NO -

Replace the power seat adjustment switch.?

B1846

DTC Troubleshooting: B1846

DTC B1846:

Power Seat Front Up-Down 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 front up-down switch in each direction for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1846 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).

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Is there continuity?

YES -

Repair a short to body ground in the wire.?

NO -

Go to step 19.

19. Turn the ignition switch to ON (II), and measure the voltage between the same terminal and body ground.

Is there any voltage?

YES -

Repair a short to power in the wire. This short may have also damaged the climate control unit. Repair a short to power before replacing the climate

control unit.?

NO -

Go to step 20.

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

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

22. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector A (40P) terminal No. 6 and body ground.

2010 Acura Truck MDX V6-3.7L Page 152

Is there continuity?

YES -

Repair an open in the wire between the power tailgate closer unit and power tailgate control unit.?

NO -

Replace the power tailgate closer unit.?

B1382

DTC Troubleshooting: B1382

DTC B1382:

Power Tailgate Closer Unit Full Latch 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 B1382 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 tailgate outer handle.

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

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

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

10. Check for continuity between power tailgate closer unit 6P connector terminals No. 1 and No. 2.

2010 Acura Truck MDX V6-3.7L Page 24

Is there continuity?

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 -

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

41. Measure the voltage between right 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 right 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 right BSI radar unit.?

B18B8

DTC Troubleshooting: B18B8, B18B9

DTC B18B8:

Left BSI Radar Unit Azimuth Off Alignment

DTC B18B9:

Right BSI Radar Unit Azimuth Off Alignment

1. Check the installation of the BSI radar unit and the main bracket.

Is it OK?

YES -

Check the vehicle condition:

2010 Acura Truck MDX V6-3.7L Page 170

Is there continuity?

YES -

Repair a short to ground in the wire.?

NO -

Check for 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.?

B1575

DTC Troubleshooting: B1575

DTC B1575:

Automatic Lighting Sensor 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. Check for DTCs with the HDS.

Is DTC B1575 indicated?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the automatic lighting sensor and the MICU.?

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

5. Disconnect under-dash fuse/relay box connector P (30P).

6. Disconnect the automatic lighting sensor 5P connector.

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

8. Check for continuity between under-dash fuse/relay box connector P (30P) terminals No. 14, No. 27, and No. 30 and the automatic

lighting sensor 5P connector terminals No. 1, No. 3, and No. 5 respectively.

2010 Acura Truck MDX V6-3.7L Page 255

Is there continuity?

YES -

Go to step 13.

NO -

Repair an open in the wire.?

13. Check for continuity between driver's power window motor 6P connector terminal No. 5 and body ground.

Is there continuity?

YES -

Repair a short in the wire.?

NO -

Go to step 14.

14. Do the driver's power window motor test See: Windows and Glass/Windows/Power Window Motor/Testing and Inspection/Driver's Power

Window Motor Test.

Is the motor OK?

YES -

Replace the driver's MPCS unit.?

NO -

Replace the driver's power window motor.?

15. Check for continuity between driver's MPCS unit connector B (14P) terminals No. 3 and No. 6 and the driver's power window motor 6P

connector terminals No. 1 and No. 2 respectively.

2010 Acura Truck MDX V6-3.7L Page 105

Is there continuity?

YES -

Repair a short to body ground in the wire.?

NO -

Go to step 16.

16. Turn the ignition switch to ON (II), and measure the voltage between the same terminal and body ground.

Is there any voltage?

YES -

Repair a short to power in the wire. This short may have also damaged the climate control unit. Repair a short to power before replacing the climate

control unit.?

NO -

Go to step 17.

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

18. Reconnect the climate control unit connector A (40P).

19. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector A (40P) terminal No. 6 and body ground.

2010 Acura Truck MDX V6-3.7L Page 81

Is there continuity?

YES -

Go to step 9.

NO -

Repair an open in the wire between the climate control unit and the rear evaporator temperature sensor.?

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

terminal No. 1.

Is there continuity?

YES -

Check for loose wires or poor connections at climate control unit connector A (40P), B (14P), and at the rear evaporator temperature sensor 2P

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 -

Repair an open in the wire between the climate control unit and the rear evaporator temperature sensor.?

B1214

DTC Troubleshooting: B1214 (P)

DTC B1214 or DTC indicator P and MODE:

A Short 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.

2010 Acura Truck MDX V6-3.7L Page 196

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 slide switch is operated?

YES -

Replace the slide 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 slide motor 2P connector.

29. Check for continuity between power seat control unit connector B (18P) terminals No. 7 and No. 17 and slide motor 2P connector terminals

No. 1 and No. 2 respectively.

2010 Acura Truck MDX V6-3.7L Page 62

Is there continuity?

YES -

Update the PCM if it does not have the latest software See: Powertrain Management/Computers and Control Systems/Engine Control

Module/Testing and Inspection/Programming and Relearning/PCM Update, or substitute a known-good PCM, and recheck. If the indication goes

away, replace the original PCM See: Powertrain Management/Computers and Control Systems/Engine 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.?

B1170

DTC Troubleshooting: B1170

DTC B1170:

Gauge Control Module Lost Communication with VSA Modulator-Control Unit (VSA 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 B1170 indicated?

YES -

Go to step 5.

NO -

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

modulator-control unit.?

5. Check for VSA System DTCs with the HDS.

Are there any DTCs indicated?

2010 Acura Truck MDX V6-3.7L Page 18

Is there continuity?

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 -

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

41. Measure the voltage between right 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 right 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 right BSI radar unit.?

B18B7

DTC Troubleshooting: B18B6, B18B7

DTC B18B6:

Lost Communication with Left BSI Radar Unit

DTC B18B7:

Lost Communication with Right BSI Radar Unit

1. Clear the DTCs with the HDS.

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

3. Check for DTCs with the HDS.

Is DTC B18B6 or B18B7 indicated?

2010 Acura Truck MDX V6-3.7L Page 222

Is there continuity?

YES -

Repair a short to ground in the wire.?

NO -

Go to step 31.

31. Do the tilt motor test. See: Steering and Suspension/Steering/Steering Column/Tilt Wheel Motor/Testing and Inspection

Is the motor OK?

YES -

Replace the power tilt/telescopic steering control unit.?

NO -

Replace the power tilt motor/position sensor.?

B1841

DTC Troubleshooting: B1841

DTC B1841:

Telescopic 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 telescopic switch in each direction for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1841 indicated?

YES -

Go to step 5.

NO -

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

5. Check for DTCs with the HDS.

Is DTC B1840 also indicated?

YES -

Go to step 17.

NO -

Go to step 6.

6. Clear the DTCs with the HDS.

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

8. Operate the telescopic switch for 2 seconds, and check the telescopic motor operation.

Does the telescopic motor run smoothly?

2010 Acura Truck MDX V6-3.7L Page 177

Is there continuity?

YES -

There is a short in the wires between the HandsFreeLink control unit and the HFL-navigation microphone. Replace the affected shielded harness.?

NO -

Go to step 9.

9. Check for continuity between HandsFreeLink control unit 28P connector terminals No. 13 and No. 14 and HFL-navigation microphone 7P

connector terminals No. 3 and No. 2 respectively.

Is there continuity?

YES -

Go to step 10.

NO -

There is an open in the wires between the HandsFreeLink control unit and the HFL-navigation microphone. Replace the affected shielded

harness.?

10. Disconnect audio-navigation unit connector C (28P).

11. Check for continuity between body ground and HandsFreeLink control unit 28P connector terminals No. 27 and No. 28 individually.

2010 Acura Truck MDX V6-3.7L Page 118

Is there continuity?

YES -

Check for loose wires or poor connections at climate control unit connectors A (40P), B (14P), and at the rear air mix control motor 7P

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 -

Repair an open in the wire(s) between the climate control unit and the rear air mix control motor.?

B1245

DTC Troubleshooting: B1245 (G and MODE)

DTC B1245 or DTC indicator G and MODE:

A Short in the Rear Air Mix Control 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 B1245 or G and MODE indicated?

YES -

Go to step 5.

NO -

Intermittent failure, check for loose wires or poor connections in the rear air mix control motor circuit.?

5. Check for DTCs.

Are these DTCs also present; B1234 or K and AUTO, and/or B1237 or N and AUTO, and/or B2968 or A and WINDSHIELD DEFROST, and/or

B2980 or B and WINDSHIELD DEFROST?

2010 Acura Truck MDX V6-3.7L Page 272

Is there continuity?

YES -

Repair a short to ground in the wire.?

NO -

Go to step 12.

12. Check for continuity between front passenger's door subharness 16P connector terminals No. 3 and No. 6.

Is there continuity?

YES -

Repair a short in the wires.?

NO -

Go to step 13.

13. Reconnect front passenger's MPCS unit connector A (28P).

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

15. Measure the voltage between front passenger's door subharness 16P connector terminal No. 3 and body ground.

Is there about 5 V?

YES -

Replace the right power mirror.?

NO -

Replace the front passenger's MPCS unit.?