P1603

L : P1603. TCM EEPROM FAILURE

G354462t66 : DTC SET BY 3 POSSIBLE FACTORS
1. Check battery voltage.

- Has the battery been discharged to a voltage where the engine would not crank?

-> Yes
CHARGE and test the battery. Install a new battery, if required. Carry out a drive-cycle. The vehicle may lose it's adaptive values and will need to re-learn them. These values will depend on the owner's driving style, and can only be learnt by normal use.

-> No

G354462t67 : DTC SET BY 3 POSSIBLE FACTORS
1. Check the TCM for signs of water ingress.

- Does the TCM show any indication of water ingress?

-> Yes
INSTALL a new TCM. CLEAR the DTC, test the system for normal operation.

-> No

G354462t68 : DTC SET BY 3 POSSIBLE FACTORS
1. Check if the battery has been disconnected with the ignition switched on.

- Has the battery been disconnected with the ignition switched on?

-> Yes
CARRY out a drive-cycle. The vehicle may lose it's adaptive values and will need to re-learn them. These values will depend on the owner's driving style, and can only be learnt by normal use.

-> No
INSTALL a new TCM. CLEAR the DTC, test the system for normal operation.