( TL19E00G24100013131FAAT00 )

Audio Communication Line Circuit Troubleshooting

1. Connect the center display unit 12P connector No. 7 and No. 8 terminals with a jumper wire.

1. Turn the ignition switch to ON (II).

1. Press and hold the DEF button and OFF button.

Is the DEF button LED blinking?

YES | - | Center display unit is faulty, replace the center display unit.
NO | - | Heater control unit is faulty, replace the heater control unit.