Invalid Control Module Version

(P0702) INVALID CONTROL MODULE VERSION





When Monitored and Set Condition
- When Monitored: With the ignition on.
- Set Condition: The TCM is not the correct one for the vehicle or has not been flashed properly.

POSSIBLE CAUSES
- TRANSMISSION CONTROL MODULE

Diagnostic Test
1. PRE-DIAGNOSTIC CHECK OUT





Note: Low fluid level can be the cause of many transmission problems. If the fluid level is low, locate and repair the leak, then check and adjust the fluid level in accordance with the Service Information.

Note: Always perform diagnostics with a fully charged battery to avoid false symptoms.
With the DRB III*, read the engine DTCs. Check and repair all engine DTCs prior to performing transmission symptom diagnostics.
With the DRB III*, read and record all Transmission DTCs.

Note: Check connectors - Clean/Repair as necessary. Poor pin to terminal connections can set DTCs.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Most DTCs set on start-up but some must be set by driving the vehicle such that all diagnostic monitors have run.

Note: Verify flash level of the transmission controller. Some problems are corrected by software upgrades to the transmission controller.

Note: Check for any Technical Service Bulletins that may apply.

Perform this procedure prior to Symptom diagnosis.
Continue
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2. VALIDATE PART NUMBER AND FLASH





Validate if the TCM part number and flash is correct for the vehicle.
Is the TCM part number and flash correct for the vehicle?
Yes>>Replace the Transmission Control Module.
Perform NAG1 TRANSMISSION VERIFICATION TEST.
No>>Flash the controller as applicable. If the controller has the wrong part number or cannot be flashed, replace the Transmission Control Module.
Perform NAG1 TRANSMISSION VERIFICATION TEST. Verification Tests