P1603

L : P1603. TCM EEPROM FAILURE

G195523t66 : 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 battery. INSTALL a new battery, if required. CARRY out a drive-cycle. The transmission may lose it's adaptive values and will need to re-learn these values. These values will depend on the owner's driving style, and can only be learnt by normal use.

-> No

G195523t67 : 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 and main control valve body. CLEAR the DTC. TEST the system for normal operation.

-> No

G195523t68 : 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 transmission may lose it's adaptive values and will need to re-learn these values. These values will depend on the owner's driving style, and can only be learnt by normal use.

-> No
INSTALL a new TCM and main control valve body. CLEAR the DTC. TEST the system for normal operation.