Test 59A - Communication With Transmission Control Module

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagrams, see appropriate article in ENGINE PERFORMANCE:

WIRING DIAGRAMS - 3.3L
WIRING DIAGRAMS - 3.5L
Perform TEST VER-1 after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.

Using scan tool, read body computer DTCs. If scan tool displays TRANS PRNDL MESSAGE TEST FAILED, go to step 4). If scan tool does not display TRANS PRNDL MESSAGE TEST FAILED, go to next step.
Using scan tool, actuate PRNDL lamps. If each lamp illuminates individually then all at once, test passes. Go to next step. If test fails, repair or replace instrument cluster. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
Using scan tool, select Transmission Control Module (TCM). Select monitors in state displays. Monitor Shift Lever Position (SLP) state of shift lever status. Apply parking brake. Move gear shift lever through all positions. If SLP state matches gear shift lever position, repair or replace instrument cluster. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. If SLP state does not match gear shift lever position, see appropriate transmission article in the TRANSMISSION SERVICING article.
NOTE: Low battery or momentary Chrysler Collision Detection (CCD) bus failure may cause DTCs to set.
Using scan tool, erase DTCs. Start and run engine for 2 minutes. Turn engine off. Turn ignition on. Using scan tool, read body computer DTCs. If TRANS PRNDL MESSAGE TEST FAILED DTC does not return, system is operating properly at this time. If TRANS PRNDL MESSAGE TEST FAILED DTC returns, go to next step.
Turn ignition off. Disconnect Transmission Control Module (TCM) connector. TCM is located in engine compartment between left front fender and battery. Turn ignition on. Using scan tool in voltmeter mode, connect a jumper wire between TCM connector terminal No. 43 (Violet/Brown wire) and chassis ground. Using scan tool, perform CCD bus test. If scan tool does not display BUS SHORTED TO GROUND, repair open Violet/Brown wire. If scan tool displays BUS SHORTED TO GROUND, go to next step.
Disconnect jumper wire. Connect jumper wire between TCM connector terminal No. 4 (White/Black wire) and chassis ground. If scan tool does not display BUS SHORTED TO GROUND, repair open White/Black wire. If scan tool does not display BUS SHORTED TO GROUND, replace TCM.