DTC P0702-04: Transmission Control System Electrical - System internal failures: Action
- Prioritized steps to perform:
- Check startup battery charge and condition and record values
- Using the Jaguar Land Rover approved diagnostic equipment, read all DTCs and investigate any DTCs relating to startup battery voltage supply. Rectify as required
- Inspect the transmission connector(s) for signs of water ingress, pin damage and/or corrosion. Rectify as required
- Using the Jaguar Land Rover approved diagnostic equipment, check datalogger signal - Main ECU Supply Voltage (0xD112)
- Refer to the electrical circuit diagrams, record the observed values for the transmission control module VBATT, ground and IGN circuits then check for open circuit, high resistance. Repair the wiring harness as necessary
- Using the Jaguar Land Rover approved diagnostic equipment, reconfigure the transmission control module with the latest level software
- Using the Jaguar Land Rover approved diagnostic equipment, clear DTCs and retest
- If the fault persists, raise a Technical Assist (TA) for further support