- Press the brake pedal.
Are the brake lights ON?
YES - Go to step 2.
NO - Repair faulty brake light circuit. 
- Disconnect under-dash fuse/relay box No. 10 connector (13P).
- Measure the voltage between the No. 3 terminal of the No. 10 connector (13P) and body ground when pressing the brake pedal and when it released.
UNDER-DASH FUSE/RELAY BOX No. 10 CONNECTOR (13P)
Wire side of female terminals
Is there battery voltage when pressing the brake pedal and no voltage when it released?
YES - Go to step 4.
NO - Repair open or short in brake pedal position switch wire between the brake pedal position switch and the multiplex control unit.
- Reconnect the No. 10 connector (13P) and disconnect under-dash fuse/relay box No. 9 connector (12P).
- Turn the ignition switch ON (II).
- Measure the voltage between the No. 10 terminal of the No. 9 connector (12P) and body ground. (The shift lever is in
position.)
UNDER-DASH FUSE/RELAY BOX No. 9 CONNECTOR (12P)
Wire side of female terminals
Is there voltage?
YES - Repair open in ATP P wire between the transmission range switch and the multiplex control unit.
NO - Go to step 7.
- Turn the ignition switch OFF.
- Reconnect the No. 9 connector (12P).
- Disconnect the centre console (see page 20-73).
- Disconnect the shift lock solenoid connector.
- Turn the ignition switch ON (II).
