43A0

43A0-ABS/ESP PUMP CONTROL CIRCUIT HIGH





For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
Continuous

- Set Condition:
The ABM detects low pump motor feedback voltage with actuation of the pump motor relay.





Diagnostic Test

1. CHECK FOR A DTC 43D0-ABS/ESP PUMP CONTROL CIRCUIT HIGH
NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.
With the scan tool, record and erase DTCs.
Cycle the ignition switch from off to on.
Road test the vehicle over 10 km/h (7 mph).

NOTE: Vehicle must be driven above 10 km/h (7 mph) for set conditions to be meet.

With the scan tool, read DTCs.
Does the scan tool display: 43D0-ABS/ESP PUMP CONTROL CIRCUIT HIGH?

Yes

- Go To 2

No

- Perform ABS VERIFICATION TEST. Verification Tests.

2. CHECK THE ABS FUSED B+ PUMP FOR AN OPEN
Turn the ignition off.
Remove and visually inspect the ABS Fused B+ Pump fuse.
Is the ABS Pump Motor B+ fuse open?

Yes

- Go To 3

No

- Go To 5

3. CHECK THE FUSED B(+) PUMP FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the Anti-Lock Brake Module harness connector.
Using a 12-volt test light connected to 12-volts, probe the Fused (B+) Pump circuit.
Does the test light illuminate brightly?

Yes

- Repair the Fused B(+) Pump circuit for a short to ground.
- Perform ABS VERIFICATION TEST.Verification Tests.

No

- Go To 4

4. CHECK THE FUSED B(+) PUMP CIRCUIT
Turn the ignition off.
Visually inspect the Fused B(+) Pump circuit in the wiring harness.
Look for any signs of intermittent short to ground.
Is the wiring harness OK?

Yes

- Go To 5

No

- Repair the Fused B(+) Pump circuit for a short to ground.
- Perform ABS VERIFICATION TEST.Verification Tests.

5. CHECK THE VOLTAGE ON THE FUSED B(+) PUMP CIRCUIT
Turn the ignition off.
Disconnect the Anti-Lock Brake Module harness connector.
Measure the voltage of the Fused B(+) Pump circuit in the Anti-Lock Brake Module harness connector.
Is the voltage above 10 volts?

Yes

- Go To 6

No

- Repair the Fused B(+) Pump circuit for an open.
- Perform ABS VERIFICATION TEST.Verification Tests.

6. CHECK THE GROUND CIRCUITS FOR AN OPEN
Measure the resistance of the Ground circuits between the Anti-Lock Brake Module harness connector and ground
Is the resistance below 5.0 ohms?

Yes

- Replace the ICU.
- Perform ABS VERIFICATION TEST. Verification Tests.

No

- Repair the high resistance in the affected circuit.
- Perform ABS VERIFICATION TEST.Verification Tests.