Acura RL. Instruction — page 758

Fig. 64: Checking Continuity Between SH-AWD Control Unit Connector Terminal A10 And
Gauge Assembly Connector Terminal B15

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Check for loose connector terminals at the SH-AWD control unit, the gauge assembly, and
G602. If all connections are OK, replace the SH-AWD control unit (see SH-AWD CONTROL
UNIT REPLACEMENT
).

NO — Repair open in the wire between SH-AWD control unit connector A and gauge assembly
connector B.

DTC 42-1: DIFFERENTIAL OIL TEMPERATURE SENSOR (OPEN)

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. Turn the ignition switch ON (II).

6. Check for DTCs with the HDS.

Is DTC 42-1 indicated?

YES — Go to step 7.

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

7. Turn the ignition switch OFF.

8. Disconnect the rear differential oil temperature sensor 2P connector and SH-AWD connector A (26P).

9. Check for continuity between rear differential oil temperature sensor 2P connector terminals No. 1

and No. 2.

NOTE:

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

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

me

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

Page 59

© 2005 Mitchell Repair Information Company, LLC.

Fig. 65: Checking Continuity Between Rear Differential Oil Temperature Sensor 2P Connector
Terminals No. 1 And No. 2

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Repair short in the wire between rear differential oil temperature sensor 2P connector terminals
No. 1 and No. 2.

NO — Go to step 10.

10. Connect the rear differential oil temperature sensor 2P connector.

11. Measure the resistance between SH-AWD control unit connector terminals A9 and A23.

Fig. 66: Measuring Resistance Between SH-AWD Control Unit Connector Terminals A9 And
A23

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 520 ohms to 3.5 kohms, with the rear differential fluid at normal temperature?

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

NO — Replace the rear differential oil temperature sensor (see REAR DIFFERENTIAL FLUID
TEMPERATURE SENSOR REPLACEMENT
).

DTC 42-2: DIFFERENTIAL OIL TEMPERATURE SENSOR (SHORT)

NOTE:

Before you troubleshoot, review the general troubleshooting information

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

me

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

Page 60

© 2005 Mitchell Repair Information Company, LLC.

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. Turn the ignition switch ON (II).

6. Check for DTCs with the HDS.

Is DTC 42-2 indicated?

YES — Go to step 7.

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

7. Turn the ignition switch OFF.

8. Disconnect the rear differential oil temperature sensor 2P connector.

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

10. Check for continuity between SH-AWD control unit connector terminal A9 and rear differential oil

temperature sensor 2P connector terminal No. 2.

Fig. 67: Checking Continuity Between Terminal A9 And Rear Differential Oil Temperature
Sensor 2P Connector Terminal No. 2

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Go to step 11.

NO — Repair open in the wire between SH-AWD control unit connector A and the rear differential oil
temperature sensor connector.

11. Check for continuity between SH-AWD control unit connector terminals A9 and A12.

(see GENERAL TROUBLESHOOTING INFORMATION ).

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

me

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

Page 61

© 2005 Mitchell Repair Information Company, LLC.

Fig. 68: Checking Continuity Between SH-AWD Control Unit Connector Terminals A9 And
A12

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Repair short in the wire between SH-AWD control unit connector A and the rear differential
oil temperature sensor connector.

NO — Go to step 12.

12. Check for continuity between SH-AWD control unit connector terminals A12 and A23.

Fig. 69: Checking Continuity Between SH-AWD Control Unit Connector Terminals A12 And
A23

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Repair short in the wire between SH-AWD control unit connector A and the rear differential
oil temperature sensor connector.

NO — Go to step 13.

13. Reconnect the rear differential oil temperature sensor 2P connector.

14. Measure the resistance between SH-AWD control unit connector terminals A9 and A23.

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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