Acura RL. Instruction — page 147

Fig. 231: Measuring Resistance Between No. 16 And No. 28 Terminals Of SRS Unit Connector
A (28P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES — Faulty right front impact sensor or SRS unit; replace the right front impact sensor (see FRONT
IMPACT SENSOR REPLACEMENT
). If the problem is still present, replace the SRS unit (see
SRS UNIT REPLACEMENT ).

NO — Short in dashboard wire harness A or engine compartment wire harness; replace the faulty
harness.

DTC 41-2X, 41-8X, 41-9X, 41-BX («X» CAN BE 0 THRU 9 OR A THRU F): INTERNAL FAILURE
OF THE LEFT FRONT IMPACT SENSOR; DTC 42-2X, 42-8X, 42-9X, 42-BX («X» CAN BE 0
THRU 9 OR A THRU F): INTERNAL FAILURE OF THE RIGHT FRONT IMPACT SENSOR

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 41-2x, 41-8X, 41-9x, 41-Bx, 42-2x, 42-8x, 42-9x, or 42-Bx
indicated?

YES — Replace the left or right front impact sensor (see FRONT IMPACT SENSOR
REPLACEMENT
). If the DTC returns, replace the SRS unit (see SRS UNIT REPLACEMENT ).

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

DTC 43-1X («X» CAN BE 0 THRU 9 OR A THRU F): NO SIGNAL FROM THE LEFT SIDE
IMPACT SENSOR (FIRST)

Special Tools Required

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 2:21:57 PM

Page 172 © 2005 Mitchell Repair Information Company, LLC.

SRS inflator simulator 07SAZ-TB4011A

SRS simulator lead H 07YAZ-S3AA100

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 43-1 x 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. Check the connections between SRS unit connector C (28P) and the SRS unit, between the left side

wire harness 2P connector and the left side impact sensor (first), at left wire harness 16P connector
C604 and right wire harness connector C604 (see LEFT SIDE WIRE HARNESS (FRONT
BRANCH)
).

Are the connections OK?

YES — Go to step 5.

NO — Repair the poor connections and retest. If the DTC 43-1 x is still present, go to step 5.

5. Disconnect the left side wire harness 2P connector (A) from the left side impact sensor (first).

Fig. 232: Identifying Left Side Impact Sensor (First) And 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

6. Disconnect SRS unit connector C (28P) from the SRS unit (see step 7 ).

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 2:21:57 PM

Page 173 © 2005 Mitchell Repair Information Company, LLC.

7. Measure the resistance between the No. 11 and No. 12 terminals of SRS unit connector C (28P).

There should be an open circuit or at least 1 M ohms.

Fig. 233: Measuring Resistance Between No. 11 And No. 12 Terminals Of SRS Unit Connector
C (28P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES — Go to step 8.

NO — Short in the left side wire harness or right side wire harness; replace the faulty harness.

8. Measure the resistance between the No. 11 terminal of SRS unit connector C (28P) and body ground,

and between the No. 12 terminal and body ground. There should be an open circuit or at least
1Mohms.

Fig. 234: Measuring Resistance Between No. 11 [No. 12] Terminal Of SRS Unit Connector C
(28P) And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES — Go to step 9.

NO — Short to ground in the left side wire harness or right side wire harness; replace the faulty
harness.

2007 Acura RL

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

me

Friday, June 05, 2009 2:21:57 PM

Page 174 © 2005 Mitchell Repair Information Company, LLC.

9. Reconnect the negative cable to the battery.

10. Turn the ignition switch ON (II).

11. Measure the voltage between the No. 11 terminal of SRS unit connector C (28P) and body ground,

and between the No. 12 terminal and body ground. There should be 1 V or less.

Fig. 235: Measuring Voltage Between No. 11 [No. 12] Terminal Of SRS Unit Connector C (28P)
And Body Ground

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the voltage as specified?

YES — Go to step 12.

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

12. Turn the ignition switch OFF.

13. Connect the SRS inflator simulator (jumper connector) and simulator lead H to the left side wire

harness 2P connector (A).

Fig. 236: Identifying Left Side Impact Sensor And 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2007 Acura RL

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

me

Friday, June 05, 2009 2:21:57 PM

Page 175 © 2005 Mitchell Repair Information Company, LLC.

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