Acura RL. Manual - part 168

Fig. 353: Measuring Resistance Between No. 2 Terminal Of Driver's Under-Dash Fuse/Relay
Box Connector S (2P) And No. 18 Terminal Of SRS Unit Connector A (28P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES - Open in the driver's under-dash fuse/relay box or poor connection between connector S (2P)
and the driver's under-dash fuse/relay box; check the connection. If the connection is OK, replace the
driver's under-dash fuse/relay box.

NO - Open in dashboard wire harness A; replace dashboard wire harness A.

DTC B2-1X ("X" CAN BE 0 THRU 9 OR A THRU F): NO SIGNAL FROM THE REAR SAFING
SENSOR

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 B2-1x 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.

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

Friday, June 05, 2009 2:21:58 PM

4. Check the connection between the floor wire harness 2P connector and rear safing sensor (see REAR

SAFING SENSOR REPLACEMENT ).

Is the connection OK?

YES - Go to step 5.

NO - Repair the poor connection and retest. If the DTC B2-11 is still present, go to step 5.

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

Fig. 354: Identifying Left Side Rear Safing Sensor And Wire Harness 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. 5 and No. 6 terminals of SRS unit connector C (28P). There

should be an open circuit or at least 1Mohms.

Fig. 355: Measuring Resistance Between No. 5 And No. 6 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.

2007 Acura RL

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

Friday, June 05, 2009 2:21:58 PM

8. Measure the resistance between the No. 5 terminal of SRS unit connector C (28P) and body ground,

and between the No. 6 terminal and body ground. There should be an open circuit or at least 1Mohms.

Fig. 356: Measuring Resistance Between No. 5 [No. 6] 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. 5 terminal of SRS unit connector C (28P) and body ground, and

between the No. 6 terminal and body ground. There should be 1 V or less.

Fig. 357: Measuring Voltage Between No. 5 [No. 6] 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.

2007 Acura RL

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

Friday, June 05, 2009 2:21:58 PM

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. 358: Identifying Left Side Rear Safing Sensor And Wire Harness 2P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

14. Measure the resistance between the No. 5 and No. 6 terminals of SRS unit connector C (28P). There

should be 0-1.0 ohms or less.

Fig. 359: Measuring Resistance Between No. 5 And No. 6 Terminals Of SRS Unit Connector C
(28P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the resistance as specified?

YES - Faulty rear safing sensor or SRS unit; replace the rear safing sensor (see REAR SAFING
SENSOR REPLACEMENT ). If the problem is still present, replace the SRS unit (see SRS UNIT
REPLACEMENT ).

NO - Open in the floor wire harness; replace the floor wire harness.

2007 Acura RL

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

Friday, June 05, 2009 2:21:58 PM

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