2010 Acura Truck MDX V6-3.7L Page 425

and Drivetrain/Relays and Modules - Differential/Control Unit/Service and Repair, and recheck. If the symptom/indication goes away with the

updated SH-AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good SH-AWD control unit,

replace the original SH-AWD control unit See: Powertrain Management/Transmission Control Systems/Relays and Modules - Transmission and

Drivetrain/Relays and Modules - Differential/Control Unit/Service and Repair.?

NO -

Repair an open in the wire between SH-AWD control unit connector terminal A8 and the rear differential fluid temperature sensor 2P

connector.?

42-2x

SRS DTC Troubleshooting: 42-2x, 42-8x, 42-9x, 42-Ax, 42-Bx

DTC 42-2x, 42-8x, 42-9x, 42-Ax, 42-Bx ("x" can be 0 thru 9 or A thru F):

Internal Failure of the Right Front Impact Sensor

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

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

Inspection/Reading and Clearing Diagnostic Trouble Codes.

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 42-2x, 42-8x, 42-9x, 42-Ax, or 42-Bx indicated?

YES -

Faulty right front impact sensor; replace the right front impact sensor See: Restraints and Safety Systems/Air Bag Systems/Impact Sensor/Service

and Repair/Front Impact Sensor Replacement, then clear the DTC. If the DTC 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 -

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?

42-8x

SRS DTC Troubleshooting: 42-2x, 42-8x, 42-9x, 42-Ax, 42-Bx

DTC 42-2x, 42-8x, 42-9x, 42-Ax, 42-Bx ("x" can be 0 thru 9 or A thru F):

Internal Failure of the Right Front Impact Sensor

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

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

Inspection/Reading and Clearing Diagnostic Trouble Codes.

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 42-2x, 42-8x, 42-9x, 42-Ax, or 42-Bx indicated?

YES -

Faulty right front impact sensor; replace the right front impact sensor See: Restraints and Safety Systems/Air Bag Systems/Impact Sensor/Service

and Repair/Front Impact Sensor Replacement, then clear the DTC. If the DTC 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 -

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?

2010 Acura Truck MDX V6-3.7L Page 575

and Drivetrain/Relays and Modules - Differential/Control Unit/Service and Repair, and recheck. If the symptom/indication goes away with the

updated SH-AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good SH-AWD control unit,

replace the original SH-AWD control unit See: Powertrain Management/Transmission Control Systems/Relays and Modules - Transmission and

Drivetrain/Relays and Modules - Differential/Control Unit/Service and Repair.?

58-xx

SRS DTC Troubleshooting: 51-xx, 52-xx, 53-xx, 54-xx, 55-xx, 57-xx, 58-xx

DTC 51-xx, 52-xx, 53-xx, 54-xx, 55-xx, 57-xx, 58-xx ("x" can be 0 thru 9 or A thru F):

Internal Failure of the SRS Unit

NOTE:

- Before troubleshooting any of these DTCs, check the battery/system voltage and battery cable connections See: Starting and

Charging/Battery/Testing and Inspection/Component Tests and General Diagnostics/Battery Test. If the voltage is low, repair the charging

system, test and charge, or replace the battery before troubleshooting the SRS. If the battery/system voltage is now OK, ask the customer if

the battery ever went dead or if the engine was started and run with the battery in a low state of charge. A dead battery may trigger one or

more of these DTCs.

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

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

Inspection/Reading and Clearing Diagnostic Trouble Codes.

- 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 51-xx, 52-xx, 53-xx, 54-xx, 55-xx, 57-xx, or 58-xx indicated?

YES -

Faulty SRS unit; 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 -

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?

Adaptive Cruise Control

Adaptive Cruise Control (ACC) DTC Troubleshooting: 59

DTC 59:

F-CAN B Communication Error

1. Check for DTCs with the HDS.

Are DTCs 59 and 60 indicated?

YES -

Go to DTC 60 troubleshooting See: 60.?

NO -

Go to step 2.

2. Clear the DTCs with the HDS.

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

4. Press the MAIN switch ON.

5. Check for DTCs with the HDS.

2010 Acura Truck MDX V6-3.7L Page 537

and Drivetrain/Relays and Modules - Differential/Control Unit/Service and Repair, and recheck. If the symptom/indication goes away with the

updated SH-AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good SH-AWD control unit,

replace the original SH-AWD control unit See: Powertrain Management/Transmission Control Systems/Relays and Modules - Transmission and

Drivetrain/Relays and Modules - Differential/Control Unit/Service and Repair.?

54

VSA DTC Troubleshooting: 54

DTC 54:

Fail-safe Relay Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

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

2. Check the No. 12 (20 A) fuse in the main under-hood fuse box.

Is the fuse blown?

YES -

Go to step 3.

NO -

Reinstall the checked fuse, then go to step 5.

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

4. Check for continuity between VSA modulator-control unit 46P connector terminal No. 44 and body ground.

Is there continuity?

YES -

Repair a short to body ground in the wire between the No. 12 (20 A) fuse in the main under-hood fuse box and the VSA modulator-control unit.?

NO -

Install a new No. 12 (20 A) fuse, then go to step 7.

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

6. Measure the voltage between VSA modulator-control unit 46P connector terminal No. 44 and body ground.