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Home >> Chrysler >> 2001 >> Sebring LX, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Powertrain Diagnostic Procedures - Except Coupe) >> Diagnostic Information And Procedures >> DRIVEABILITY - NGC - Diagnostic Tests >> U0101-No Transmission Bus Message >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURES - U0101-NO TRANSMISSION BUS MESSAGE

TEST ACTION APPLICABILITY
1
NOTE: If P1603 or P1604 are set along with this DTC, diagnose them first before continuing with P1698.
NOTE: Before continuing, inspect all fuses and ensure that all power and ground circuits are operating properly.
NOTE: Check all powers and grounds to the PCM before continuing.
Turn the ignition on.With the DRBIII®, erase DTCs.Start the engine, allow the engine to run for at least 20 seconds with the gear selector in Drive. Repeat at least 2 times.With the DRBIII®, read DTC's.Does the DTC reset?Yes --> Go To 2No --> Refer to the INTERMITTENT CONDITION .Perform POWERTRAIN VERIFICATION TEST VER - 1 .		 All
2 Turn the ignition off.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMINALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.

Turn the ignition to run.
Using a 12-volt test light connected to ground, probe the (F12) Fused Ignition Switch Output (Off-Run-Start) cavity C1-12 circuit at the appropriate terminal of the special tool #8815.
NOTE: If the test light illuminates, wiggle the wiring harness to ensure that the problem is not an intermittent wiring problem.

Does the test light illuminate brightly?
Yes --> Go To 3
No --> Check all related fuses. Repair the (F12) Fused Ignition Switch Output circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 1 .		 All
3
NOTE: Determine which modules this vehicle is equipped with before beginning.
NOTE: When attempting to communicate with any of the modules on this vehicle, the DRB will display 1 of 2 different communication errors: a NO RESPONSE message or a BUS +/- SIGNALS OPEN message.
Turn the ignition on.Using the DRB, attempt to communicate with the following control modules:Body Control Module (BCM)Instrument Cluster (MIC)Controller Antilock Brake (CAB)Was the DRB able to communicate with one or more Module(s)?Yes --> Replace and program the Powertrain Control Module in accordance with the Service Information.Perform POWERTRAIN VERIFICATION TEST VER - 1 .No --> Refer to PCI BUS COMMUNICATION FAILURE  symptom.Perform POWERTRAIN VERIFICATION TEST VER - 1 .		 All
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