•  Turn the ignition switch to the ON position.

•  Is the pump motor normal?

•  Replace the ABS CM.

•  Go to the next step.

•  Connect the M-MDS.

•  Turn the ignition switch to the ON position.

•  Set the ABS simulation function to PMP_MOTOR ON.

•  Does the pump motor operate?

•  Clear the DTC from the memory. Inspect the ABS warning light (yellow) while driving the vehicle at more than 32 km/h {20 mph} and no brakes applied until the vehicle exceeds 32 km/h {20 mph}. If the ABS warning light (yellow) illuminates, replace the ABS CM with a new one.

•  Go to the next step.

•  Turn the ignition switch off.

•  Disconnect the ABS HU/CM connectors.

•  Connect a fused 50 A jumper wire between the positive battery terminal and the ABS HU/CM terminal. Connect a jumper wire between the negative battery terminal and the ABS HU/CM terminal.

•  Does the pump motor operate?

•  Go to the next step.

•  Replace the ABS HU/CM and perform the self-test.

•  Turn the ignition switch off.

•  Disconnect the ABS HU/CM connectors.

•  Turn the ignition switch to the ON position.

•  Measure the resistance between the ABS HU/CM terminal B and ground.

•  Is the voltage more than 10 V?

•  Go to the next step.

•  Repair or replace the wiring harness. Clear the DTC from the memory and perform the self-test.

•  Turn the ignition switch off.

•  Measure the resistance between the ABS HU/CM terminal C and ground, and between the ABS HU/CM terminal D and ground.

•  Is the resistance less than 5 ohms?

•  Replace the ABS CM.

•  Repair or replace the wiring harness. Clear the DTC from the memory and perform the self-test.