1. Traction System Relay Output Circuit Open

Turn the ignition off.

Disconnect the TCM harness connector.

NOTE: Check connector - Clean/repair as necessary.

Turn the ignition on.

Measure the voltage of the Traction System Relay Output circuit at the TCM harness connector.

Fig 1: Measuring Voltage Of Traction System Relay Output Circuit At TCM Harness Connector

Courtesy of DAIMLERCHRYSLER CORP.

Is the voltage above 10 volts?

Yes >> Go to 2
No >> Repair the Traction System Relay Output circuit for an open.
Perform TRANSMISSION VERIFICATION TEST. See ELECTRICAL DIAGNOSTICS - NAG1 article.