Check the Supplies and Grounds to the Transmission Module (TCM)

: CHECK THE SUPPLIES AND GROUNDS TO THE TRANSMISSION CONTROL MODULE (TCM)

G239843t108 : CHECK THE PERMANENT SUPPLY TO THE TCM
1. Disconnect the TCM electrical connector, GB02.
2. Measure the voltage between GB02, pin 14 (NR) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the TCM and battery. This circuit includes the front power distribution box (fuse 17). TEST the system for normal operation.

-> No

G239843t109 : CHECK THE IGNITION SUPPLY TO THE TCM
1. Turn the ignition switch to the ON position.
2. Measure the voltage between GB02, pin 09 (GO) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the TCM and battery. This circuit includes the primary junction box (fuse 33) and the ignition switch. TEST the system for normal operation.

-> No

G239843t110 : CHECK THE GROUND TO THE TCM
1. Measure the resistance between GB02, pins 13 and 16 (B) and GROUND.

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. TEST the system for normal operation.

-> No
CHECK for DTCs indicating a network or module fault. REFER to the DTC index.