3. Air Pump Relay Control Circuit Short To Ground

Turn the ignition off.

Disconnect the Relay Control Module A harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance between ground and the Air Pump Relay Control circuit.

Fig 1: Measuring Resistance Between Ground & Air Pump Relay Control Circuit

Courtesy of DAIMLERCHRYSLER CORP.

Is the resistance below 100 ohms?

Yes >> Repair the Air Pump Relay Control circuit for a short to ground.
See POWERTRAIN VERIFICATION TEST - VER 2 .
No >> Go To 4