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Home >> Jeep >> 2005 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 490 (Powertrain Diagnostic Procedures - Diesel) >> Diagnostic Information And Procedures >> Communication - Symptoms >> Symptom: LOST COMMUNICATION WITH TCM (FCM) (DIESEL ONLY) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURES - LOST COMMUNICATION WITH TCM [FCM] (DIESEL ONLY)

TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, attempt to communicate with the Transmission Control Module.
Was the DRB able to I/D or communicate with the TCM?
Yes --> Go To 2
No --> Refer to the COMMUNICATION  category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1 .		 All
2 With the DRB, erase DTC's.
Turn the ignition on and wait approximately 1 minute.
With the DRB, read DTC's.
Did this DTC reset?
Yes --> Replace the Front Control Module in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Test Complete.		 All
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