Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 432

INSPECTION PROCEDURE 35
Stop lamp switch system
The engine-ECU determines whether the brake pedal is depressed or not, by means
of the stop lamp switch input signal.
Check the stop lamp switch. (Refer to GROUP 35 – Brake Pedal.)
Measure at stop lamp switch connector B-39.
Disconnect the connector, and measure at the harness side.
Voltage between terminal 3 and earth
OK: System voltage
Measure at engine-ECU connector B-29.
Disconnect the connector, and measure at the harness side.
Voltage between terminal 35 and earth
(Ignition switch: ON)
OK: 0 – 3 V (when the brake pedal is not depressed)
System voltage (when the brake pedal is depressed)
Check the following connector: B-29
Check trouble symptom.
Replace the engine-ECU.
GDI –
OK
OK
OK
OK
NG
Troubleshooting
Probable cause
Malfunction of the stop lamp switch
Open circuit or short-circuited harness wire in the
stop lamp circuit, or poor connector contact
Malfunction of the engine-ECU
NG
Replace
NG
Check the following connector: B-43
OK
Check trouble symptom.
Check the harness wire between the battery and stop lamp switch.
NG
Check the following connectors: B-19, B-39, B-61X
OK
Check trouble symptom.
Check the harness wire between the engine-ECU and stop lamp,
and repair if necessary.
NG
Repair
13A-73
NG
Repair
NG
NG
Repair
NG