Acura RL. Instruction — page 761

YES — Go to step 11.

NO — Replace the SH-AWD relay (see SH-AWD RELAY REPLACEMENT ).

11. Disconnect SH-AWD control unit connector A (26P) and connector B (8P).

12. Check for continuity between SH-AWD control unit connector terminal B1 and SH-AWD relay 4P

connector terminal No. 1.

Fig. 77: Checking Continuity Between SH-AWD Control Unit Connector Terminal B1 And SH-
AWD Relay 4P Connector Terminal No. 1

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Go to step 13.

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

13. Check for continuity between SH-AWD control unit connector terminal A3 and SH-AWD relay 4P

connector terminal No. 3.

Fig. 78: Checking Continuity Between SH-AWD Control Unit Connector Terminal A3 And SH-
AWD Relay 4P Connector Terminal No. 3

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

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YES — Go to step 14.

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

14. Check for continuity between SH-AWD relay 4P connector terminal No. 4 and body ground.

Fig. 79: Checking Continuity Between SH-AWD Relay 4P Connector Terminal No. 4 And Body
Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Go to step 15.

NO — Repair open in the wire between the SH-AWD relay and body ground.

15. Measure the voltage between SH-AWD relay 4P connector terminal No. 2 and body ground.

Fig. 80: Measuring Voltage Between SH-AWD Relay 4P Connector Terminal No. 2 And Body
Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES — Check for loose connector terminals at the SH-AWD control unit. If the connections are OK,
substitute a known-good SH-AWD control unit (see SH-AWD CONTROL UNIT
REPLACEMENT
) and recheck.

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2005-08 DRIVELINE/AXLES Rear Differential — RL

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NO — Repair open in the wire between the No. 1 fuse in the passenger’s under-hood fuse/relay box and
the SH-AWD relay.

DTC 46-1: SH-AWD CONTROL UNIT INTERNAL POWER SUPPLY CIRCUIT (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. Turn the ignition switch ON (II).

6. Check for DTCs with the HDS.

Is DTC 46-1 indicated?

YES — Replace the SH-AWD control unit (see SH-AWD CONTROL UNIT REPLACEMENT ).

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

DTC 52-3: LEFT CLUTCH ELECTROMAGNETIC COIL CURRENT MALFUNCTION

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. Do the clutch function test with the HDS.

5. Check for DTCs with the HDS.

Is DTC 52-3 indicated?

YES — Go to step 6.

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

6. Turn the ignition switch OFF.

7. Disconnect SH-AWD control unit connector B (8P).

8. Check for continuity between SH-AWD control unit connector terminals B2 and B4.

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.

Fig. 81: Checking Continuity Between SH-AWD Control Unit Connector Terminals B2 And B4
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Go to step 9.

NO — Go to step 11.

9. Disconnect the left clutch electromagnetic coil connector, then check for continuity between SH-

AWD control unit connector terminals B2 and B4.

Fig. 82: Checking Continuity Between SH-AWD Control Unit Connector Terminals B2 And B4
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Repair short to ground in the wire between the SH-AWD control unit and the left clutch
electromagnetic coil.

NO — Go to step 10.

10. Check for continuity between SH-AWD control unit connector terminals B2 and B5.

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

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