Acura RL. Instruction — page 128

4. Disconnect the left side wire harness 4P connector (A) from the driver’s seat belt tensioner.

Fig. 114: Identifying Left Side Wire Harness 4P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

5. Connect the SRS inflator simulator (2 ohms connectors) and simulator lead F to the left side wire

harness.

6. Reconnect the negative cable to the battery.

7. Clear the DTC memory.

8. Read the DTC (see GENERAL TROUBLESHOOTING INFORMATION ).

Is DTC 21-81 indicated?

YES — Go to step 9.

NO — Short to power in the driver’s seat belt tensioner; replace the driver’s seat belt (see FRONT
SEAT BELT REPLACEMENT
).

9. Turn the ignition switch OFF. Disconnect the negative cable from the battery, then wait for 3 minutes.

10. Disconnect the front passenger’s seat belt tensioner connector (see step 6 ).

11. Disconnect SRS unit connector B (28P) from the SRS unit (see step 7 ).

12. Disconnect the simulator lead from the left side wire harness.

13. Reconnect the negative cable to the battery.

14. Turn the ignition switch ON (II).

15. Measure the voltage between the No. 1 terminal of SRS unit connector B (28P) and body ground, and

between the No. 2 terminal and body ground. There should be 0.5 V or less.

2007 Acura RL

2005-08 RESTRAINTS SRS (Supplemental Restraint System) — RL

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© 2005 Mitchell Repair Information Company, LLC.

Fig. 115: Measuring Voltage Between No. 1 Terminal Of SRS Unit Connector B (28P) And Body
Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the voltage as specified?

YES — Faulty SRS unit or poor connection at SRS unit connector B (28P) and the SRS unit. Check the
connection; if the connection is OK, replace the SRS unit (see SRS UNIT REPLACEMENT ).

NO — Go to step 16.

16. Disconnect right side wire harness 16P connector C604 (A) from the left side wire harness connector

C604 (B).

’05 model

Fig. 116: Identifying Right Side Wire Harness 16P Connector C604 And Left Side Wire Harness
Connector C604 — ’05 Model

Courtesy of AMERICAN HONDA MOTOR CO., INC.

’06-08 models

2007 Acura RL

2005-08 RESTRAINTS SRS (Supplemental Restraint System) — RL

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Friday, June 05, 2009 2:21:56 PM

Page 97

© 2005 Mitchell Repair Information Company, LLC.

Fig. 117: Identifying Right Side Wire Harness 16P Connector C604 And Left Side Wire Harness
Connector C604 — ’06-08 Models

Courtesy of AMERICAN HONDA MOTOR CO., INC.

17. Measure the voltage between the No. 3 [No. 4] terminal of the right side wire harness 16P connector

C604 and body ground, and between the No. 4 [No. 5] terminal and body ground. There should be 0.5
V or less.

:’06-08 models

Fig. 118: Measuring Voltage Between No. 3 [No. 4] Terminal Of Right Side Wire Harness 16P
Connector C604 And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig. 119: Measuring Voltage Between No. 4 [No. 5] Terminal Of Right Side Wire Harness 16P

2007 Acura RL

2005-08 RESTRAINTS SRS (Supplemental Restraint System) — RL

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Friday, June 05, 2009 2:21:56 PM

Page 98

© 2005 Mitchell Repair Information Company, LLC.

Connector C604 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the voltage as specified?

YES — Short to power in the left side wire harness; replace the left side wire harness.

NO — Short to power in the right side wire harness; replace the right side wire harness.

DTC 21-9X («X» CAN BE 0 THRU 9 OR A THRU F): SHORT TO GROUND IN DRIVER’S SEAT
BELT TENSIONER

Special Tools Required

SRS inflator simulator 07SAZ-TB4011A

SRS simulator lead F 07XAZ-SZ30100

1. Clear the DTC memory (see CLEAR THE DTC MEMORY WITH THE HDS ).

2. Turn the ignition switch ON (II), and check that the SRS indicator comes on for about 6 seconds and

then goes off.

Does the SRS indicator stay on, and is DTC 21-9x indicated?

YES — Go to step 3.

NO — Intermittent failure, the system is OK at this time. Go to TROUBLESHOOTING
INTERMITTENT FAILURES
. If another DTC is indicated, troubleshoot the DTC.

3. Turn the ignition switch OFF. Disconnect the negative cable from the battery, then wait for 3 minutes.

4. Disconnect the left side wire harness 4P connector (A) from the driver’s seat belt tensioner.

NOTE:

Before doing this troubleshooting procedure, review SRS Precautions and
Procedures (see PRECAUTIONS AND PROCEDURES ) and General
Troubleshooting Information (see GENERAL TROUBLESHOOTING
INFORMATION ).

2007 Acura RL

2005-08 RESTRAINTS SRS (Supplemental Restraint System) — RL

me

Friday, June 05, 2009 2:21:56 PM

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© 2005 Mitchell Repair Information Company, LLC.

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