DTC A042 - Rear ESB Will Not Hold Motor: Notes

NOTE: For circuit and connector terminal identification, see WIRING DIAGRAMS .

EBCM monitors ESB for slippage. During initialization and braking, motor is rehomed. If ESB slips, motor/piston will move. During the next ignition initialization, a rehome of the motor verifies motor/piston remained at home position. If motor movement is detected, ESB must be slipping.

NOTE: Test numbers refer to test numbers on diagnostic chart.

Checks ESB. A broken or defective ESB would result in the rear piston being backdriven by hydraulic pressure and pedal movement would result.
Checks for high resistance in motor high circuit. Tester J 39200 is a DVOM with a 10-megohm input impedance.
Checks for high resistance in motor low circuit.
Checks for high resistance in motor.
Determines if fault is due to poor terminal contact or corrosion.
Determines if fault is due to faulty EBCM.