Diagnostic Test

WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE DTCs PRESENT
With the scan tool, read Engine DTCs.

Are there any Engine brake DTCs present?

Yes
1. Refer to appropriate Engine ELECTRICAL DIAGNOSTICS article and perform the appropriate symptom(s).
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. Go To 2.
WCM DTCS PRESENT
With the scan tool, read WCM DTCs.

Are there any WCM DTCs present?

Yes
1. Refer to VEHICLE THEFT SECURITY - ELECTRICAL DIAGNOSTICS and perform the appropriate diagnostic procedure.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. Go To 3.
(K321) BTSI CONTROL CIRCUIT SHORT TO VOLTAGE

Fig 1: Measuring Voltage Between Ground & (K321) BTSI Control Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position.

Disconnect the ESM C1 harness connector.

Disconnect the WCM harness connector.

Turn the ignition on.

NOTE: Check connectors - Clean/repair as necessary.

Measure the voltage between ground and the (K321) BTSI Control circuit.

Is the resistance below 5.0 ohms?

Yes
1. Repair the (K321) BTSI Control circuit for a short to voltage.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. Go To 4.
ELECTRONIC SHIFT MODULE (ESM)
Using the schematics as a guide, inspect the wiring and connectors. Repair as necessary. Pay particular attention to all power and ground circuits.

If there are no possible causes remaining, view repair.

Repair
1. Replace the Electronic Shift Module (ESM) per the Service Information.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .