Acura RL. Instruction — page 754

1. Turn the ignition switch ON (II).

2. Make sure the HDS communicates with the vehicle and the SH-AWD control unit. If it doesn’t,

troubleshoot the DLC-circuit; ’05-07 models (see ’05-07 MODELS ), ’08 model (see ’08 MODEL ).

3. Clear the DTC with the HDS.

4. Start the engine.

5. Turn the steering wheel slowly from lock to lock.

6. Check for DTCs with the HDS.

Is DTC 19-3 indicated?

YES — Go to step 7.

NO — Intermittent failure, the system is OK at this time.

7. Check for bent suspension components and proper wheel alignment.

Are there any abnormalities?

YES — Repair as needed, and recheck.

NO — Go to step 8.

8. Raise the vehicle, and make sure it is securely supported.

9. Start the engine.

10. Move the shift lever to D, and raise the vehicle speed to at least 19 mph (30 km/h). Turn the steering

wheel 45° to the right of straight, then 45° to the left of straight, then straight ahead.

11. Slow the vehicle speed to a stop with the brakes, then move the shift lever to P.

12. Check the steering angle sensor value with the HDS.

Is it with the ± 3°?

YES — Intermittent failure, the system is OK at this time.

NO — Do the SH-AWD steering angle neutral position memorization procedure (see STEERING
ANGLE NEUTRAL POSITION MEMORIZATION
).

DTC 19-4: STEERING ANGLE SENSOR CIRCUIT

1. Turn the ignition switch ON (II).

2. Make sure the HDS communicates with the vehicle and the SH-AWD control unit. If it doesn’t,

troubleshoot the DLC circuit; ’05-07 models (see ’05-07 MODELS ), ’08 model (see ’08 MODEL ).

NOTE:

Before you troubleshoot, review the general troubleshooting information
(see GENERAL TROUBLESHOOTING INFORMATION ).

NOTE:

Before you troubleshoot, review the general troubleshooting information
(see GENERAL TROUBLESHOOTING INFORMATION ).

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

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© 2005 Mitchell Repair Information Company, LLC.

3. Clear the DTC with the HDS.

4. Start the engine.

5. Turn the steering wheel slowly from lock to lock.

6. Check for DTCs with the HDS.

Is DTC 19-4 indicated?

YES — Go to step 7.

NO — Intermittent failure, the system is OK at this time.

7. Check for DTCs in the VSA system with the HDS.

Is DTC 27 indicated?

YES — Go to VSA system DTC 27 Troubleshooting, refer to DTC TROUBLESHOOTING INDEX .

NO — Substitute a known-good SH-AWD control unit (see SH-AWD CONTROL UNIT
REPLACEMENT
) and recheck.

DTC 27-1: HYPOID GEAR SPEED SENSOR (OPEN OR SHORT)

1. Turn the ignition switch ON (II).

2. Make sure the HDS communicates with the vehicle and the SH-AWD control unit. If it doesn’t,

troubleshoot the DLC circuit; ’05-07 models (see ’05-07 MODELS ), ’08 model (see ’08 MODEL ).

3. Clear the DTC with the HDS.

4. Turn the ignition switch OFF.

5. Raise the vehicle, make sure it is securely supported, and allow all four wheels to rotate freely.

6. Start the engine.

7. Shift to D position, and raise the vehicle speed to 19 mph (30 km/h).

8. Check for DTCs with the HDS.

Is DTC 27-1 indicated?

YES — Go to step 9.

NO — Intermittent failure, the system is OK at this time.

9. Check for DTCs in the VSA system with the HDS.

Are any VSA System DTCs indicated?

YES — Go to the indicated DTCs troubleshooting.

NOTE:

Before you troubleshoot, review the general troubleshooting information
(see GENERAL TROUBLESHOOTING INFORMATION ).

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

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© 2005 Mitchell Repair Information Company, LLC.

NO — Go to step 10.

10. Raise the vehicle speed to 19 mph (30 km/h) again.

11. Check a hypoid gear speed sensor value in the DATA LIST with the HDS.

Is a hypoid gear speed sensor value shown?

YES — Check the hypoid gear speed sensor installation. If it is installed properly, substitute a known-
good SH-AWD control unit (see SH-AWD CONTROL UNIT REPLACEMENT ) and recheck.

NO — Go to step 12.

12. Raise the vehicle speed to 19 mph (30 km/h) again.

13. Measure the voltage between SH-AWD control unit connector terminals A5 and A13.

Fig. 47: Measuring Voltage Between SH-AWD Control Unit Connector Terminals A5 And A13
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Does the voltage change when the propeller shaft is rotated?

YES — Substitute a known-good SH-AWD control unit (see SH-AWD CONTROL UNIT
REPLACEMENT
) and recheck.

NO — Go to step 14.

14. Turn the ignition switch OFF.

15. Disconnect the hypoid gear speed sensor 3P connector.

16. Turn the ignition switch ON (II).

17. Measure the voltage between hypoid gear speed sensor 3P connector terminals No. 1 and No. 3.

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

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© 2005 Mitchell Repair Information Company, LLC.

Fig. 48: Measuring Voltage Between Hypoid Gear Speed Sensor 3P Connector Terminals No. 1
And No. 3

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 4.0 V or more?

YES — Go to step 23.

NO — Go to step 18.

18. Turn the ignition switch OFF.

19. Disconnect SH-AWD control unit connector A (26P).

20. Check for continuity between SH-AWD control unit connector terminal A18 and hypoid gear speed

sensor 3P connector terminal No. 1.

Fig. 49: Checking Continuity Between SH-AWD Control Unit Connector Terminal A18 And
Hypoid Gear Speed Sensor Terminal No. 1

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Go to step 21.

NO — Repair open in the wire between SH-AWD control unit connector A and the hypoid gear speed
sensor connector.

21. Check for continuity between SH-AWD control unit connector terminal A18 and body ground.

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

me

Friday, June 05, 2009 3:02:18 PM

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© 2005 Mitchell Repair Information Company, LLC.

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