C1262

CIRCUIT DESCRIPTION
The EBCM/EBTCM monitors brake pedal position using the TCC/antilock brake switch. The switch, normally closed, opens when the brake pedal is depressed by 40%. The EBCM/EBTCM also monitors pump motor operation using a pump motor run sensor.

During most ABS braking conditions, the EBCM/EBTCM turns on the pump motor, replenishing the BPMV reservoir and applying fluid pressure to the master cylinder. This causes the brake pedal to rise gradually. The EBCM/EBTCM turns off the pump motor when the brake pedal height rises sufficiently in order to close the TCC/antilock brake switch.

CONDITIONS FOR SETTING THE DTC
^ During ABS braking, the DTC C1262 sets when the EBCM/EBTCM determines that the pump is working, and that brake pedal height has not risen sufficiently in order to close the TCC/antilock brake switch after 3 seconds.
^ The following are possible causes of a hydraulic problem:
- Air in the brake lines
- A pump motor mechanical failure
^ The following are possible causes of a non-hydraulic problem:
- An open CKT 848 or CKT 853
- An improperly adjusted or defective TCC/antilock brake switch

ACTION TAKEN WITH THE DTC SETS
^ DTC C1262 is stored
^ The ABS is disabled
^ The ANTILOCK indicator lamp is turned on

CONDITIONS FOR CLEARING THE DTC
The DTC will clear under the following conditions:
^ Conditions for the malfunction are no longer present. Use the scan tool clear DTCs function
^ 100 ignition switch key cycles have passed without detecting any malfunctions

DIAGNOSTIC AIDS
^ The following conditions are other possible causes of this malfunction:
- A malfunctioning TCC/Antilock switch
- A malfunctioning ABS pump relay or main relay
^ Failure to carefully inspect wiring may result in a misdiagnosis. A misdiagnosis may result in replacing parts without repairing the malfunction.

Part 1 Of 2:

Part 2 Of 2:

DTC C1262 PUMP PRESSURE MALFUNCTION DURING ABS STOP