Acura RL. Manual - part 150

(FIRST)

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 43-2x, 43-8x, 43-9x, 43-Bx, 44-2x, 44-8x, 44-9x, or 44-Bx
indicated?

YES - Replace the left or right side impact sensor (first) (see SIDE IMPACT SENSOR (FIRST)
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 45-1X ("X" CAN BE 0 THRU 9 OR A THRU F): NO SIGNAL FROM THE LEFT SIDE
IMPACT SENSOR (SECOND)

Special Tools Required



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 45-1 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 the SRS unit connector C (28P) and the SRS unit, between the left

side wire harness 2P connector and the left side impact sensor (second) (see COMPONENT
LOCATION INDEX ), at left side wire harness 16P connector C655 and right side wire harness
connector C655 (see LEFT SIDE WIRE HARNESS (REAR BRANCH) ).

NOTE:

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

NOTE:

2007 Acura RL

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

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

Are the connections OK?

YES - Go to step 5.

NO - Repair the poor connections and retest. If the DTC 45-1x is still present, go to step 5.

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

Fig. 250: Identifying Left Side Impact Sensor (Second) And 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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

7. Measure the resistance between the No. 17 and No. 18 terminals of SRS unit connector C (28P).

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

Fig. 251: Measuring Resistance Between No. 17 And No. 18 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. 17 terminal of SRS unit connector C (28P) and body ground,

and between the No. 18 terminal and body ground. There should be an open circuit or at least 1

2007 Acura RL

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

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

Mohms.

Fig. 252: Measuring Resistance Between No. 17 [No. 18] 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.

9. Reconnect the negative cable to the battery.

10. Turn the ignition switch ON (II).

11. Measure the voltage between the No. 17 terminal of SRS unit connector C (28P) and body ground,

and between the No. 18 terminal and body ground. There should be 1 V or less.

Fig. 253: Measuring Voltage Between No. 17 [No. 18] 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.

2007 Acura RL

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

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

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

14. Measure the resistance between the No. 17 and No. 18 terminals of SRS unit connector C (28P).

There should be 1.0 ohms or less.

Fig. 255: Measuring Resistance Between No. 17 And No. 18 Terminals Of SRS Unit Connector
C (28P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified ?

YES - Faulty left side impact sensor (second) or SRS unit; replace the left side impact sensor (second)
(see SIDE IMPACT SENSOR (SECOND) REPLACEMENT ). If the problem is still present,
replace the SRS unit (see SRS UNIT REPLACEMENT ).

NO - Open in the left side wire harness or right side wire harness; replace the faulty harness.

DTC 45-CX ("X" CAN BE 0 THRU 9 OR A THRU F): FAULTY POWER SUPPLY TO THE LEFT
SIDE IMPACT SENSOR (SECOND)

2007 Acura RL

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

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

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