Operation CHARM: Car repair manuals for everyone.

Failure Mode J




Mode J: Blown SRS No.7 fuse, or open in the wire.

1. Check the SRS No.7 (20A) fuse in the dash fuse box if it's OK, read the following CAUTION, then go to step 2. If it's blown, replace it with a new 20A fuse, then turn the ignition switch ON:

- If the fuse doesn't blow, read the CAUTION, then go on to step 2.

- If the fuse blows, troubleshoot as necessary to find the short.

NOTE: Before you disconnect the battery, be sure you get the customer's anti-theft radio code number.

CAUTION:
- Disconnect the battery negative cable and then disconnect the positive cable.
- Before disconnecting the airbag connector(s), turn off the ignition switch and wait for at least 3 minutes to let the capacitor in the back-up circuit discharge. This will prevent a malfunction of the seat belt pretensioners.
- Before disconnecting any part of the SRS wire harness, install short connectors (RED) on the air-bag(s). and both seat belt pretensioners. After installing the short connector(s) on the airbag(s), immediately install one Short Connector "A" (Tool Number O7MAZ-SPOO2OO) on the cable reel connector (for the driver's airbag), and another on the SRS main harness connector (for the passenger's airbag). This will prevent any static electricity from triggering the seat belt pretensioners before you disconnect them - refer to "Short Connector Installation" procedure.


2. Connect Test Harness B between the SRS unit and SRS main harness 18-P connector.






3. Reconnect the positive and negative cables to the battery.

4. Measure the voltage between the B13 terminal and body ground with the ignition switch ON.






- If there is battery voltage, the SRS unit is faulty. Replace it and recheck the voltages according to the chart in the "Indicator Stays On Continuously" procedure.

- If less than battery voltage, the SRS main harness is faulty. Replace it and recheck the voltages according to the chart in the "Indicator Stays On Continuously" procedure.