4. Sci Receive Circuit Open

With the ignition off.

Disconnect the PCM C4 harness connector.

NOTE: Check connector - Clean/repair as necessary.

Measure the resistance of the PCM SCI Receive circuit from the PCM C4 harness connector to the DLC.

Fig 1: Measuring PCM SCI Receive Circuit Resistance From PCM C4 Harness Connector To DLC

Courtesy of DAIMLERCHRYSLER CORP.

Is the resistance below 5.0 ohms?

Yes >> Go to 5
No >> Repair the PCM SCI Receive circuit for an open.
Perform POWERTRAIN VERIFICATION TEST - VER 2 in ENGINE - ELECTRICAL DIAGNOSTICS article.