Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 214

Code No. 26 Stop lamp switch system
If the stop lamp switch is on for 5 minutes or more while driving, it is judged that
there is a short circuit in the stop lamp switch and diagnosis code No. 26 is output.
Stop lamp switch check (Refer to GROUP 35 - Brake Pedal.)*
Check the following connectors:
<4G6-MPI> B-28, B-65, B-14, B-110
<4G6-GDI> B-28, B-65, B-14, B-10
Harness check
D Between stop lamp switch and engine-A/T-ECU or A/T-ECU
Check the trouble symptoms.
Code No. 31 Low and reverse solenoid valve system
Code No. 32 Underdrive solenoid valve system
Code No. 33 Second solenoid valve system
Code No. 34 Overdrive solenoid valve system
If the resistance value for a solenoid valve is too large or too small, it is judged
that there is a short-circuit or an open circuit in the solenoid valve and the respective
diagnosis code is output. The transmission is locked into 3rd gear as a fail-safe measure,
and the N range lamp flashes at a frequency of 1 Hz.
Solenoid valve check (Refer to P.23-52.)*
Check the following connectors:
<4G6-MPI> A-88, A-12X, B-110
<4G6-GDI> A-88, A-12X, B-12, B-10
Harness check
D Between solenoid valve and engine-A/T-ECU or A/T-ECU
Replace the solenoid valve.
Check the trouble symptoms.
NOTE
*: Refer to '99 SPACE RUNNER/SPACE WAGON Workshop Manual (Pub. No. PWDE9803).
AUTOMATIC TRANSMISSION -
OK
OK
OK
OK
OK
OK
Troubleshooting
Probable cause
D Malfunction of the stop lamp switch
D Malfunction of connector
D Malfunction of the engine-A/T-ECU <4G6-MPI>
D Malfunction of the A/T-ECU <4G6-GDI>
NG
Replace
NG
Repair
NG
Repair
NG
Replace the engine-A/T-ECU or A/T-ECU.
Probable cause
D Malfunction of solenoid valve
D Malfunction of connector
D Malfunction of the engine-A/T-ECU <4G6-MPI>
D Malfunction of the A/T-ECU <4G6-GDI>
NG
Replace
NG
Repair
NG
Repair
NG
Replace the engine-A/T-ECU or A/T-ECU.
23-7