Mitsubishi Galant. Manual — part 412

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-115

STEP 16. Check connectors C-17 at intermediate
connector and C-77 at junction block for damage.
Q: Are the connectors in good condition?

YES : Go to Step 17.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

STEP 17. Check harness for damage between output shaft
speed sensor harness side connector B-37 terminal 2 and
PCM connector C-42 terminal 104.
Q: Is the harness wire in good condition?

YES : Go to Step 18.
NO : Repair it.

AC004308AB

CONNECTOR: C-17

AC004307

CONNECTOR: C-77

JUNCTION BLOCK
(FRONT VIEW)

C-77

AC

AC001837AG

CONNECTOR: B-37

AC004197

PCM

AF

CONNECTOR: C-42

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-116

STEP 18. Check harness for damage between output shaft
speed sensor harness side connector B-37 terminal 1 and
PCM connector C-40 terminal 57.
Q: Is the harness wire in good condition?

YES : Go to Step 19.
NO : Repair it.

STEP 19. Check harness for damage between output shaft
speed sensor harness side connector B-37 terminal 3 and
junction block connector C-77 terminal 12.
Q: Is the harness wire in good condition?

YES : Go to Step 20.
NO : Repair it.

AC001837AG

CONNECTOR: B-37

AC004197

PCM

AD

CONNECTOR: C-40

AC001837AG

CONNECTOR: B-37

AC004307

CONNECTOR: C-77

JUNCTION BLOCK
(FRONT VIEW)

C-77

AC

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-117

STEP 20. Replace the transfer drive gear or driven gear.
(1) Replace the transfer drive gear or driven gear. Refer to

GROUP 23B, Transaxle

P.23B-10

, Output Shaft

P.23B-62

.

(2) Start the engine and run.
(3) Read in the A/T diagnostic trouble code.

Q: Is the A/T diagnostic trouble code number "23" output?

YES : The A/T diagnostic trouble code may have set due to

external radio frequency (RFI), possibly caused by
cellular phone activity, after market components
installed on the vehicle, etc.

NO : The inspection is complete.

DTC 26: Stoplight Switch System

AC002221AC

TRANSFER
DRIVE GEAR

TRANSFER
DRIVEN GEAR

AC004615

Stoplgiht Switch System Circuit

AB

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-118

CIRCUIT OPERATION

•

Battery positive voltage is supplied to the
stoplight switch (terminal 2).

•

When the brake pedal is depressed, battery
positive voltage is applied to the PCM (terminal
123). The PCM judges that the brake pedal is
depressed and the stoplight switch is on when
battery positive voltage is sensed at the PCM
(terminal 123).

DTC SET CONDITIONS
If the stoplight switch is on for five minutes or more
while driving 50 km/h (31 mph), it is judged there is a
short circuit in the stoplight switch and diagnostic
trouble code number "26" is output.

TROUBLESHOOTING HINTS (The most likely

causes for this code to be set:)

•

Malfunction of the stoplight switch circuit

AC004342

FUSIBLE LINK (1)

BATTERY

AB

AC004287

CONNECTOR: C-03

AC

AC004308AB

CONNECTOR: C-17

AC004287

CONNECTOR: C-57

AD

AC004197

PCM

AF

CONNECTOR: C-42

AC004344

CONNECTOR: C-66

CONNECTOR
BLOCK (LH)

C-66

AB

AC004307

CONNECTOR: C-77

JUNCTION BLOCK
(FRONT VIEW)

C-77

AC

AC004343

CONNECTOR: C-85

JUNCTION BLOCK
(REAR VIEW)

C-85

AB