C1242

C1217/C1243: Pump Motor Ground Circuit Open, High Resistance or Shorted to Battery/Pump Motor Stalled







CIRCUIT DESCRIPTION
Pump motor is contained within Brake Pressure Modulator Valve (BPMV). Pump motor ground is supplied through terminal E136-3 of EBCM. Battery voltage is supplied to EBCM terminal E136-15 when ignition switch is turned on. EBCM terminals E136-1 and E136-2 are 'hot at all times.'

CONDITIONS FOR SETTING THE DTC
^ DTC C1217 can only be set with ignition key in the "ON" position, pump motor is off, and EBCM detected a short to ground on pump motor circuit.
^ DTC C1242 can only be set with ignition key in the "ON" position, pump motor is off, and EBCM detected high resistance or an open circuit across motor.

ACTION TAKEN WHEN THE DTC SETS
^ ABS relay opens, removing power from pump motor and solenoids.
^ DTC (C1217 or C1242) is stored.
^ ABS disabled, ABS warning light is turned on.

DIAGNOSTIC AIDS
Typical Causes of DTC C1217.
^ Faulty BPMV.
^ Faulty EBCM.
Typical causes of DTC C1242.
^ BPMV pump motor open or high resistance.
^ EBCM malfunction.

INSPECTION

NOTE: Diagnostic flow table must be performed first before using this table.
Type 1



Substitute a known-good ABS actuator (EBCM & BPMV) assembly and recheck. Replace as necessary.