Mitsubishi Galant (2004+). Manual - part 1445

IGNITION SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-23

STEP 4. Check the wiring harness between 
immobilizer-ECU connector C-124 (terminal 1) and MFI 
relay connector B-17X (terminal 4).

NOTE: Also check intermediate connector A-13, C-29, check 
the wires. If intermediate connector A-13, C-29 are damaged, 
repair or replace them. Refer to GROUP 00E, Harness Con-
nector Inspection 

P.00E-2

.

Q: Are the wiring harness between immobilizer-ECU 

connector C-124 (terminal 1) and MFI relay connector 
B-17X (terminal 4) in good condition?
YES : There is no action to be taken.
NO :  Repair the wiring harness. Confirm that scan tool 

MB991958 communicates normally.

AC305977

RELAY BOX SIDE

CONNECTOR: B-17X

AM

AC305232

CONNECTORS: C-29, C-124

C-29

C-124

C-29

C-124

HARNESS SIDE

AV

AC305210

A-13 (GR)

AR

CONNECTOR: A-13

IGNITION SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-24

STEP 5. Measure the resistance at immobilizer-ECU 
connector C-124.

(1) Do not disconnect immobilizer-ECU connector C-124. 

(2) Measure the resistance between terminal 2 and ground.
Q: Is the resistance less than 2 ohms?

YES : Go to Step 8.
NO :  Go to Step 6.

STEP 6. Check immobilizer-ECU connector C-124 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.

Q: Is immobilizer-ECU connector C-124 in good condition?

YES : Go to Step 7.
NO :  Repair or replace the component(s). Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. Confirm 

that scan tool MB991958 communicates normally.

AC305231CQ

CONNECTOR: C-124

HARNESS SIDE

AC209364JQ

CONNECTOR C-124 
(HARNESS SIDE)

AC305231CQ

CONNECTOR: C-124

HARNESS SIDE

IGNITION SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-25

STEP 7. Check the wiring harness between 
immobilizer-ECU connector C-124 (terminal 2) and ground.

NOTE: Also check joint connector C-03, check the wires. If joint 
connector C-03 is damaged, repair or replace them. Refer to 
GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between immobilizer-ECU 

connector C-124 (terminal 2) and ground in good 
condition?
YES : There is no action to be taken.
NO :  Repair the wiring harness. Confirm that scan tool 

MB991958 communicates normally.

AC305232

CONNECTORS: C-03, C-124

C-124

C-124

HARNESS SIDE

AW

C-03

C-03

IGNITION SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-26

STEP 8. Check immobilizer-ECU connector C-124 and PCM 
connector B-19 for loose, corroded or damaged terminals, 
or terminal pushed back in the connector.

Q: Are immobilizer-ECU connector C-124 and PCM 

connector B-19 in good condition?
YES : Go to Step 9.
NO :  Repair or replace the component(s). Refer to GROUP 

00E, Harness Connector Inspection 

P.00E-2

. Confirm 

that scan tool MB991958 communicates normally.

AC305229AE

CONNECTOR: B-19

HARNESS SIDE

B-19 (B)

AC305231CQ

CONNECTOR: C-124

HARNESS SIDE