Test 7A - Left Front Sensor Circuit Failure
- Using DRB-II, read and record all speed sensor fault messages. If DRB-II does not display LEFT FRONT SENSOR CIRCUIT FAILURE, perform TEST 8A . If DRB-II displays LEFT FRONT SENSOR CIRCUIT FAILURE, inspect left front wheel speed sensor for damage. If sensor is damaged, repair or replace sensor as necessary. If sensor is okay, turn ignition off.
- Disconnect and inspect CAB 55-pin connector. Repair connector as necessary. Turn ignition on. With DRB-II in voltmeter mode, probe terminal No. 48 (Red wire) of CAB connector. If voltage is present, repair short to battery in Red wire. Perform TEST VER-1A .
- If voltage is not present, put DRB-II in ohmmeter mode. Probe terminal No. 48 (Red wire) of CAB connector. If resistance is less than 5 ohms, repair the short to ground in the Red wire. Perform TEST VER-1A . If resistance is more than 5 ohms, go to next step.
- Using an external ohmmeter, check resistance between terminals No. 48 (Red wire) and 30 (Red/Dark Blue wire) of CAB connector. If resistance is 900-1300 ohms, replace the CAB. Perform TEST VER-1A . If resistance is not 900-1300 ohms, disconnect and inspect left front wheel speed sensor connector.
- Using an external ohmmeter, check resistance between left wheel speed sensor connector terminals. If resistance is not 900-1300 ohms, replace wheel speed sensor. If resistance is 900-1300 ohms, check resistance of Red wire between terminals No. 48 of CAB connector and No. 1 of left front wheel speed sensor connector using an external ohmmeter.
- If resistance is more than 5 ohms, repair open Red wire. Perform TEST VER-1A . If resistance is less than 5 ohms, repair open Red/Dark Blue wire. Perform TEST VER-1A .