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Jeep Won’t Start

This bulletin applies to 2013 Jeep Wrangler vehicles equipped with a 2.8L engine. The customer may experience a no-crank, no-start condition. Upon further diagnosis, the technician may find an active B2204 ECU Configuration Mismatch.

This condition may be caused by the voltage dropping below 4.5 volts for greater than 200 msec. The WCM will lose information from the EEPROM. Information that may be lost includes key programmed status and immobilizer feature enabled status.

1. Does the vehicle have an active B2204? If so, proceed to Step 2. If not, proceed to the repair procedure.

2. Use the wiTECH to start the key programming process. Select “WCM Icon.” Select Misc function tab. Highlight program ignition keys and then select the green arrow to start the function. Select continue. Locate and enter the pin and then select continue. Verify the pin, then select “YES” then continue. Place the programmed key in the ignition. At this point close this procedure.

3. Enter the diagnostic procedures folder home screen on the wiTECH and perform the reset ECU procedure for the WCM. Resetting the WCM will force the vehicle configuration to be relearned and written to the WCM EEPROM. Select diagnostic procedure tab. Highlight reset ECU and then select the green arrow to run diagnostic. Select continue in the routine. Highlight WCM module and select continue. Select continue again (WCM resetting). Close the routine.

4. Did B2204 go stored and does the vehicle start and run? If yes, perform the repair procedure. If not, continue diagnosis.


1. Flash reprogram the WCM. Help using the wiTECH diagnostic application for flashing the WCM is made available through the wiTECH diagnostic application.

2. Clear any DTCs that may have been set in other modules due to reprogramming.

Tags: ECU  Jeep  Jeep Wrangler  No crank 
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