DTC 38: Left Front Expansion Spring Brake (ESB) Will Not Hold Motor: Description

EBCM detects that ESB could not hold piston in home position.

1. Turn ignition on. Pump brake pedal. Using scan tool, select ABS TESTS. Using manual control, select left front motor apply. Apply motor. Wait 5 seconds and then apply firm pressure on brake pedal. If brake pedal falls, replace motor pack. If brake pedal does not fall, go to next step.
2. Turn ignition switch to LOCK position. Disconnect EBCM harness connectors and motor pack connector. Measure resistance of Light Green wire between terminal No. 6 on ABS actuator motor pack harness connector and terminal No. 2 on EBCM 8-pin harness connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair high resistance in Light Green wire.
3. Measure resistance of Light Green/Black wire between terminal No. 5 on ABS actuator motor pack harness connector and terminal No. 1 on EBCM 8-pin harness connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair high resistance in Light Green/Black wire.
4. Measure resistance between terminals No. 5 and 6 on ABS actuator motor pack component connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, replace motor pack.
5. Inspect EBCM and motor pack harness connectors. Ensure connectors are clean and tight. Repair as needed. If connectors are okay, go to next step.
6. Reconnect all connectors. Test drive vehicle for 2 drive cycles. See CLEARING CODES . If DTC 38 resets, replace EBCM. If DTC 38 does not reset, system is currently operating correctly. See DIAGNOSTIC AIDS .