DTC 38

Fig. 357 Code 38: Left Front EMB Will Not Hold Motor:

Left Front EMB Will Not Hold Motor:

Circuit Description:
Current is supplied to the EMB's through terminal "B" of the three-way motor pack connector. When a release of the EMB is commanded, the EBCM grounds the EMB input and allows the EMB to be energized to release the motor.

The left front motor is commanded in the forward direction while the EMB is released (energized).

DTC Will Set When:
DTC 38 can be set during initialization. A malfunction exists if the feedback current is less than the command current and the left front channel was expected to be in the home position. DTC 86 is always set with DTC 38.

Action Taken:
If an EMB can not hold a motor in the home position, the motor may be back driven when the brake pedal is applied causing the brake pedal to drop. A malfunction DTC is stored, ABS is disabled and the "ABS" warning lamp is turned "ON."

DTC Chart Test Description:
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Ensures motor circuits are in the proper connector cavity.
2. Checks the ability of the EMB to hold the motor. If the brake pedal moves during this test, it would indicate the EMB is slipping.
3. Checks for high resistance in the left front motor high circuit.
4. Checks for high resistance in the left front motor low circuit.
5. Checks for excessive resistance in the left front motor.
6. Ensures malfunction was not due to a poor connection.

Diagnostic Aids:
An "intermittent" malfunction in this DTC may result from a mechanical part of the system that sticks, binds, or slips.

The frequency of the malfunction can be checked by using the enhanced diagnostic function of the Tech 1.

NOTICE:
This test may fail if low voltage (10 volts or less) was present when initialization occurred. Ensure battery/charging system is functioning properly.