Mitsubishi Galant 9G. Manual - part 510

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-118

STEP 11. Check the harness for damage between PCM 
connector B-19 terminal 9 and stoplight switch connector 
C-30 terminal 1.
Q: Is the harness wire in good condition?

YES : Go to Step 12.
NO :  Repair or replace the harness wire.

AC306248AF

B-19 
(B)

CONNECTOR: B-19

PCM

AIR
CLEANER

JAE

17

13

10

12

1516

5 6

9

2

14

18

11

4

7

3

8

1

AC305231

CONNECTOR: C-30

AU

2

1

3

4

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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STEP 12. Using scan tool MB991958, check data list item 
26: Stoplight Switch.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode.

• Item 26: Stoplight Switch.

• When the brake pedal is depressed, the display on 

scan tool MB991958 should be "ON."

• When the brake pedal is not depressed, the display 

on scan tool MB991958 should be "OFF."

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?

YES : It can be assumed that this malfunction may be 

intermittent. Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-14

.

NO :  Replace the PCM.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

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AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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23A

DTC 27 (P0705): Transmission Range Switch System (Open Circuit)

CAUTION

If DTC 27 (P0705) has been set, TCL related DTC 
C1397 is also set. After DTC 27 (P0705) has been 
diagnosed, don’t forget to erase DTC C1397.

IGNITION
SWITCH (IG1)

JUNCTION
BLOCK

JOINT
CONNECTOR (1)

TRANSMISSION
RANGE
SWITCH

POWERTRAIN
CONTROL MODULE

AC306048AB

Transmission Range Switch System Circuit <Vehicles without Sport Mode>

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AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-121

JUNCTION
BLOCK

JOINT
CONNECTOR (1)

TRANSMISSION
RANGE
SWITCH

POWERTRAIN
CONTROL MODULE

IGNITION
SWITCH (IG1)

SELECT
SWITCH

SHIFT SWITCH
ASSEMBLY

AUTO
MODE

SPORT
MODE

AC209758AC

Transmission Range Switch System Circuit <Vehicles with Sport Mode>

AUTO
MODE

SPORT
MODE