DTC 45

CIRCUIT DIAGRAM





INSPECTION PROCEDURE

CIRCUIT DESCRIPTION:
These DTCs are designed to detect a bound-up ESB, a stuck motor or a seized hydraulic modulator. When the release is commanded during initialization, the ESB should release the motor, resulting in sensed current being less than commanded current (motor is spinning freely). If the motor is not moving, sensed current will be equal to stall current.

FAILURE CONDITION:
DTCs 44 and 45 can beset during normal operation. If the Electronic Brake Control Module (EBCM) detects a condition in which it cannot move the motor in either direction, a malfunction exists.

DIAGNOSTIC AIDS:
An "intermittent" malfunction may be caused by a poor connection, rubbed through wire insulation or a wire that is broken inside the insulation.
The frequency of the malfunction can be checked by using the enhanced diagnostic function of the TECH-1, as described in "Enhanced Diagnostics". DTC 44 or 45 may be set after modulator disassembly if the modulator pistons are positioned at the bottom of their bore. Any circuitry that is suspected of causing the intermittent complaint should be thoroughly checked for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wiring connections or physical damage to the wiring harness.