2010 Acura Truck MDX V6-3.7L Page 4

NO -

Go to step 11.

11. Check for continuity between climate control unit connector A (40P) terminals as follows.

Is there continuity between any of the terminals?

YES -

Repair a short in the wires.?

NO -

Go to step 12.

12. 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(s) between the climate control unit and the front mode control motor. This short may also damage the climate

control unit. Repair a short to power before replacing the climate control unit.?

NO -

Check for loose wires or poor connections at climate control unit connector A (40P) and at the front mode 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.?

Open

DTC Troubleshooting: B2967 (A and WINDSHIELD DEFROST)

DTC B2967 or DTC indicator A and WINDSHIELD DEFROST:

An Open in the Humidity Sensor Circuit

1. Clear the DTCs with the HDS.

2010 Acura Truck MDX V6-3.7L Page 477

46

Adaptive Cruise Control (ACC) DTC Troubleshooting: 46

DTC 46:

Cal FL Brake Fluid Pressure Sensor Malfunction

NOTE: In this troubleshooting, you will operate the ADAPTIVE CRUISE CONTROL (ACC) BRAKE (brake actuator 3) continuously four or five

times using the FUNCTION TEST with the HDS. During this operation, the VSA modulator-control unit may stop working. This means the VSA

modulator-control unit has shut down to protect the system from overheating during continuous operation.

If the VSA modulator-control unit stops working, wait for a few minutes until the VSA modulator-control unit cools down, then restart the

troubleshooting.

1. Start the engine, and press the MAIN switch ON.

2. Clear the DTCs with the HDS.

3. Select ADAPTIVE CRUISE CONTROL (ACC) from the DRIVING SUPPORT menu, then enter the FUNCTION TEST.

4. Activate BRAKE ACTUATOR 3 from the FUNCTION TEST menu.

5. Watch the ACC indicator.

Does the ACC indicator come on?

YES -

Go to step 9.

NO -

Go to step 6.

6. Activate BRAKE ACTUATOR 3 again.

7. While the brake actuator is operating, press the brake pedal.

8. Watch the ACC indicator.

Does the ACC indicator come on?

YES -

Go to step 9.

NO -

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

9. Check for DTCs with the HDS.

Is DTC 46 indicated?

YES -

Go to step 10.

NO -

Troubleshoot the indicated DTC(s). If there are no DTCs, the system is OK at this time.?

10. Without the brake pedal pressed, check the left front brake fluid pressure voltage (LF BRAKE P) with the HDS.

2010 Acura Truck MDX V6-3.7L Page 268

Repair, Rear See: Steering and Suspension/Suspension/Rear Knuckle/Service and Repair.

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

11. Clear the DTC with the HDS.

12. Test-drive the vehicle at 10 mph (15 km/h) or more.

13. Check for DTCs with the HDS.

Is DTC 12, 14, 16, or 18 indicated?

YES -

Go to step 14.

NO -

Replace the original hub bearing unit:

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14. 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. If the unit already has the latest software, substitute a known-good VSA

modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Traction Control Module/Service and

Repair.

15. Test-drive the vehicle at 10 mph (15 km/h) or more.

NOTE: Drive the vehicle on a straight section of road, not on a lift.

16. Check for DTCs with the HDS.

Is DTC 12, 14, 16, or 18 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 46P connector. Check for a loose connection at G303. If the VSA modulator-control

unit was updated, substitute a known-good VSA modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Traction Control Module/Service and Repair, then retest. If the VSA modulator-control unit was substituted, go to step 1.

NO -

If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the

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

Module/Service and Repair. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.?

TPMS System

TPMS DTC Troubleshooting: 11, 13, 15, 17

DTC 11, 13, 15, 17:

Tire Low Air Pressure

NOTE: If low tire pressure is detected, the TPMS control unit will set one or more of these DTCs, and turn on the low tire pressure indicator and

the appropriate tire indicator(s). If the low tire pressure and tire indicators come on because of a low tire pressure, and the client corrects it before

bringing the vehicle in, the DTCs will be stored, but all the indicators will be off.

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

2. Make sure the tires are inflated to the specified tire pressure listed on the doorjamb sticker.

3. Test-drive the vehicle.

Does the low tire pressure indicator go off?

YES -

The system is OK at this time. Check for and repair the cause of air loss.?

2010 Acura Truck MDX V6-3.7L Page 449

39. Measure the voltage between body ground and floor wire harness 2P connector (right side impact sensor (second)) terminals No. 1 and No. 2

individually. There should be less than 0.2 V.

Is the voltage as specified?

YES -

Go to step 40.

NO -

Short to power in the floor wire harness between the right side impact sensor (first) and the right side impact sensor (second); replace the floor

wire harness, then clear the DTC.?

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

41. Measure the resistance between floor wire harness 4P connector (right side impact sensor (first)) terminals No. 1 and No. 4 and floor wire

harness 2P connector (right side impact sensor (second)) terminals No. 1 and No. 2. There should be less than 1.0 Ohms.

Is the resistance as specified?

YES -

Disconnect and reconnect the connector, and then check DTC again. If the problem is still present, replace the SRS unit See: Relays and

Modules/Relays and Modules - Restraints and Safety Systems/Air Bag Control Module/Service and Repair/SRS Unit Replacement.

NO -

Open in the floor wire harness between the right side impact sensor (first) and the right side impact sensor (second); replace the floor wire harness,

2010 Acura Truck MDX V6-3.7L Page 230

22. Reconnect the negative cable to the battery.

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

24. Measure the voltage between body ground and each terminals of both SRS simulator leads individually. There should be less than 0.2 V.

Is the voltage as specified?

YES -

Faulty SRS unit or poor connection at SRS unit connector A (39P) and the SRS unit. Check the connection between the connector and the SRS

unit. If the connection is OK, replace the SRS unit See: Relays and Modules/Relays and Modules - Restraints and Safety Systems/Air Bag Control

Module/Service and Repair/SRS Unit Replacement.?

NO -

Short to power in the dashboard wire harness; replace the dashboard wire harness, then clear the DTC.?

11-9x

SRS DTC Troubleshooting: 11-9x, 11-Bx

DTC 11-9x ("x" can be 0 thru 9 or A thru F):

Short to Ground in the Driver's Airbag First Inflator

DTC 11-Bx ("x" can be 0 thru 9 or A thru F):

Short to Ground in the Driver's Airbag Second Inflator

Special Tools Required

- SRS Inflator Simulator 07SAZ-TB4011A

- SRS Simulator Lead J 070AZ-SNAA100

NOTE:

- Before doing this troubleshooting procedure, review SRS Precautions and Procedures See: Body and Frame/Air Bag(s) Arming and

Disarming/Service and Repair, General Troubleshooting Information See: Restraints and Safety Systems/Air Bag Systems/Testing and

Inspection/Reading and Clearing Diagnostic Trouble Codes, and Battery Terminal Disconnection and Reconnection See: Starting and

Charging/Battery/Service and Repair/Procedures.

- Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS

unit software See: Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Programming and Relearning/SRS Unit Update,

and retest.

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 11-9x or 11-Bx indicated?

2010 Acura Truck MDX V6-3.7L Page 75

Go to step 30.

NO -

Repair an open in the wire between the No. 2 (RR BLOWER) (30 A) in the main under-hood fuse box and the rear blower motor relay.?

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

31. Measure the voltage between rear 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 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.?

M and Auto

DTC Troubleshooting: B1236 (M and AUTO)

DTC B1236 or DTC indicator M and AUTO:

An Open in the Passenger's 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).

2010 Acura Truck MDX V6-3.7L Page 117

Is there continuity?

YES -

Go to step 16.

NO -

Repair an open in the wire between the left-front suspension stroke sensor and the headlight leveling control unit.?

16. Check for continuity between body ground and headlight leveling control unit 16P connector terminal No. 9.

Is there continuity?

YES -

Go to step 18.

NO -

Repair an open in the wire between the headlight leveling control unit and body ground (G401).?

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

18. Reconnect all connectors.

19. Remove the left-front suspension stroke sensor See: Sensors and Switches/Sensors and Switches - Steering and Suspension/Sensors and

Switches - Suspension/Ride Height Sensor/Service and Repair. Do not disconnect the sensor connector.

20. Start the engine, and wait 5 seconds.

21. Check the SUS STROKE_S VOLTAGE (LF) in the ACTIVE DAMPER SYSTEM DATA LIST with the HDS while moving the suspension

stroke sensor arm through a complete stroke. Compare the voltage/rotation angle between the chart and the measurements.

NOTE: The voltage should increase (decrease) within 90 degrees of the sensor arm rotation from the first voltage change point.