DTC 38

ESB Does Not Hold Motor:

ABS Modulator Motor Pack:

RIGHT FRONT ESB DOES NOT HOLD MOTOR
The Expansion Spring Brakes (ESB) are used on both front and rear actuator motor assemblies. The ESB is a mechanical clutch that prevents the modulator piston from being back-driven by hydraulic pressure. If the ESB allows the motor to be back-driven, the antilock telltale will be turned On.

CODE PARAMETERS
Code 38 sets if:
^ Right front ESB does not hold motor.
^ This code can set during initialization.
^ This code can be set after an ABS stop if this channel did not get into ABS.

DIAGNOSTIC AIDS
The ESB is an internal component of the ABS motor pack and can not be serviced separately. If it is determined to be faulty, the motor pack must be replaced.

WARNING: When replacing motor pack do not place hands near the motor/modulator gears. The gears may have enough preloaded tension to cause personal injury.

Use Scan tool to perform ABS motor tension release special test before removing motor pack.

When the ignition is cycled On, the ABS module verifies motors are in home position.

The ABS system will initialize (run motors down then up) when the vehicle is driven at least 5 km/h (3 mph) after start-up.

NOTE: Initialization alternates between left front/rear and right front/rear each ignition cycle.

When attempting to diagnose an intermittent problem, use the Scan tool (select Malfunction History from Scan tool ABS menu) to review supplemental diagnostic information. The supplemental data can be used to duplicate a problem.