SRS Indicator Light Doesn't Come On

SRS Indicator Doesn't Come On

NOTE: Perform the gauge self test before beginning troubleshooting.

1. Turn the ignition switch ON (II), and see if the other indicators come on (brake system, etc).

Do the other indicators come on?

YES - Go to step 2.

NO - Go to step 9.




2. Turn the ignition switch OFF, then remove the gauge assembly. Disconnect gauge assembly connectors A and B from the gauge assembly.




3. Check resistance between the No.18 terminal of gauge assembly connector A (18P) and body ground. There should be 0 - 1.0 Ohm.

Is the resistance as specified?

YES - Go to step 4.

NO - Open in the BLK wire of the dashboard wire harness or junction connector, or faulty body ground terminal (G503). If the body ground terminal is OK, replace the dashboard wire harness.




4. Check for voltage between the No.7 terminal of gauge assembly connector A (18P) and body ground within the first 6 seconds after turning the ignition switch ON (II). There should be about 1.0 V for 6 seconds and then about 11 V.

Is the voltage as specified?

YES - Faulty SRS indicator circuit in the gauge assembly; replace the gauge assembly.

NO - Go to step 5.

5. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.
6. Disconnect SRS unit connector A (28P) from the SRS unit.
7. Reconnect the battery negative cable.




8. Connect a voltmeter between the No.7 terminal of gauge assembly connector A (18P) and body ground. Turn the ignition switch ON (II), and measure voltage. There should be 0.5 V or less.

Is the voltage as specified?

YES - Faulty SRS unit; replace the SRS unit.

NO - Short to power in the PNK wire of the dashboard wire harness or junction connector; replace the dashboard wire harness.

9. Turn the ignition switch OFF. Check the No.21 (7.5 A) fuse in the under-dash fuse/relay box.

Is the fuse blown?

YES - Go to step 11.

NO - Go to step 10.




10. Connect a voltmeter between the No.10 terminal of the gauge assembly connector A (18P) and body ground. Turn the ignition switch ON (II), and measure voltage. There should be battery voltage.

Is there battery voltage?

YES - Faulty SRS indicator circuit in the gauge assembly or poor contact at gauge assembly connector A (18P) and the gauge assembly; if the connection is OK, replace the gauge assembly.

NO - Open in the under-dash fuse/relay box No.21 (7.5 A) fuse circuit, or open in the YEL wire of the dashboard wire harness or junction connector. If the under-dash fuse/relay box is OK, replace the dashboard wire harness.

11. Replace the No.21 (7.5 A) fuse, then check to see if the indicators comes on.

Do the indicators come on?

YES - The system is OK at this time.

NO - Repair the short to ground in the under-dash fuse/relay box No.21 (7.5 A) fuse circuit.