Pinpoint Test D: DTC C1300 - Abs Hydraulic Pump Motor Circuit Failure
WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
- D1 CHECK THE ANTI-LOCK BRAKE SYSTEM (ABS) PUMP MOTOR
- Key in ON position.
- Is the ABS pump motor running all the time?
- Yes : GO to D5.
- No : GO to D2.
- D2 CHECK THE PUMP MOTOR OPERATION
- Connect the diagnostic tool.
- Key in ON position.
- Trigger the ABS module pump motor ON active command.
- Does the ABS pump motor run for approximately three seconds?
- Yes
: CLEAR the DTCs. CHECK the yellow ABS warning indicator while driving the vehicle (the brakes must not be applied) above 32 km/h (20 mph).
If the yellow ABS warning indicator illuminates, RETRIEVE the DTCs. If DTC C1300 is retrieved again GO to D5.
If the yellow ABS warning indicator does not illuminate, the system is OK.
- No : TRIGGER the ABS module pump motor OFF active command. GO to D3.
- D3 CHECK CIRCUIT 534 (YE/LG) FOR AN OPEN
- Disconnect: ABS Module C135.
- Measure the voltage between the ABS module C135-13, circuit 534 (YE/LG), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes : GO to D4.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
- D4 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between the ABS module C135-12, circuit 57 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new hydraulic control unit (HCU). REFER To HYDRAULIC CONTROL UNIT (HCU) . CLEAR the DTCs. REPEAT the self-test.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
- D5 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect the ABS connector.
- Check for:
- Corrosion
- Pushed-out pins
- Connect the ABS connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . TEST the system for normal operation.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.