1. Turn ignition ON
2. Turn the steering wheel from lock to lock.

Is power assist present?

Go to Step 2

Go to Step 3

Does the power assist feel erratic?

Go to Power Steering Hydraulic System Test

System OK

Caution: DC and AC high-voltage is present. To reduce the risk of severe shocks and burns, the high-voltage system should be disabled any time service work is being performed on or around the high-voltage system. When in doubt, always disable the high-voltage system. The 12-volt system will still be active after the high-voltage system has been disabled.

Refer to High Voltage Disabling in HVAC Systems with A/C Manual.

1. Disconnect P/S pump high voltage cable from the power steering control module (PSCM).
2. Inspect for damaged terminals or cable.

Is the cable or the terminals damaged?

Go to Step 4

Go to Step 5

Repair terminals if disfigured or corroded, otherwise replace P/S pump.

System OK

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1. Perform Electro-Hydraulic Power Steering Pump Insulation Test in Power Steering Systems.
2. If test passes, return to this point in this test.

Did the test pass?

Go to Power Steering Hydraulic System Test

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