Acura RL. Instruction — page 762

Fig. 83: Checking Continuity Between SH-AWD Control Unit Connector Terminals B2 And B5
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 — Replace the rear differential side case (see SIDE CASE REPLACEMENT ).

11. Check for continuity between SH-AWD control unit connector terminals B4 and B5.

Fig. 84: Checking Continuity Between SH-AWD Control Unit Connector Terminals B4 And B5
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

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

NO — Go to step 12.

12. Connect a jumper wire between SH-AWD control unit connector terminals B4 and B5. Disconnect the

left clutch electromagnetic coil 2P connector, then check for continuity between left clutch
electromagnetic coil 2P connector terminals No. 1 and No. 2.

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

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Fig. 85: Connecting Jumper Wire Between SH-AWD Control Unit Connector Terminals B4
And B5

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig. 86: Checking Continuity Between Left Clutch Electromagnetic Coil 2P Connector
Terminals No. 1 And No. 2

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Replace the rear differential side case (see SIDE CASE REPLACEMENT ).

NO — Repair open in the wire between the SH-AWD control unit and the left clutch electromagnetic
coil.

DTC 53-1: LEFT CLUTCH ELECTROMAGNETIC COIL (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. Do the clutch function test with the HDS.

5. Check for DTCs with the HDS.

Is DTC 53-1 indicated?

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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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 B4 and B5.

Fig. 87: Checking Continuity Between SH-AWD Control Unit Connector Terminals B4 And B5
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Go to step 9.

NO — Go to step 10.

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

terminals B2 and B5.

Fig. 88: Checking Continuity Between SH-AWD Control Unit Connector Terminals B2 And B4,
And Between Terminals B2 And B5

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.

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

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© 2005 Mitchell Repair Information Company, LLC.

NO — Go to step 11.

10. Connect a jumper wire between SH-AWD control unit connector terminals B4 and B5. Disconnect the

left clutch electromagnetic coil 2P connector, then check for continuity between left clutch
electromagnetic coil 2P connector terminals No. 1 and No. 2.

Fig. 89: Connecting Jumper Wire Between SH-AWD Control Unit Connector Terminals B4
And B5

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig. 90: Checking Continuity Between Left Clutch Electromagnetic Coil 2P Connector
Terminals No. 1 And No. 2

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Replace the rear differential side case (see SIDE CASE REPLACEMENT ).

NO — Repair open in the wire between the SH-AWD control unit and the left clutch electromagnetic
coil.

11. Measure the resistance between left clutch electromagnetic coil 2P connector terminals No. 1 and No.

2.

2007 Acura RL

2005-08 DRIVELINE/AXLES Rear Differential — RL

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© 2005 Mitchell Repair Information Company, LLC.

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