Mitsubishi L200. Manual - part 597

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-59

STEP 3. Check the harness for open circuit 
between ignition switch and combination meter 
connector C-112 (terminal No.36).

AC903856AR

Connector: C-112 <LHD>

Harness side 
connector 
(rear view)

AC903868

BD

Connector: C-112 <RHD>

Harness side 
connector 
(rear view)

NOTE: 

AC903853

Connector: C-132 <LHD>

AC

C-132 (GR)

AC903865

Connector: C-132 <RHD>

AB

C-132 (GR)

AC509934 AS

Connectors: C-207, C-209 <LHD>

Harness side

C-209

C-207

Harness side

C-209

C-207

Junction block (Front view)

AC509936 AN

Connectors: C-207, C-209 <RHD>

Harness side

C-209

C-207

Harness side

C-209

C-207

Junction block (Front view)

Prior to the wiring harness inspection, check junction 
block connector C-132, C-207 and C-209, and repair 
if necessary.

Q: Is the check result normal?

YES : 

An intermittent malfunction is suspected 

(Refer to GROUP 00, How to Cope with 
Intermittent Malfunction ).

NO : 

Repair the harness wires between ignition 
switch and the combination meter connector 
C-112 (terminal No.36). Then go to Step 7.

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-60

STEP 4. Check SRS-ECU connector C-131.

AC501670

AB

C-131 (Y)

Connector: C-131

Harness side 
connector 
(rear view)

Q: Is the connector correctly engaged?

YES : 

Go to Step 5.

NO : 

Engage the connector correctly. Then go to 
Step 7.

STEP 5. Check the harness for short circuit 
between the combination meter connector C-113 
(terminal No.18) and SRS-ECU connector C-131 
(terminal No.8).

AC903856BM

Connector: C-113 <LHD>

Harness side 
connector 
(rear view)

AC903868

CC

Connector: C-113 <RHD>

Harness side 
connector 
(rear view)

AC501670

AB

C-131 (Y)

Connector: C-131

Harness side 
connector 
(rear view)

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the harness wires between the 
combination meter connector C-113 
(terminal No.18) and SRS-ECU connector 
C-131 (terminal No.8). Then go to Step 7. 

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-61

STEP 6. Check the SRS warning lamp.
(1) Disconnect the negative battery terminal.

AC501670

AB

C-131 (Y)

Connector: C-131

Harness side 
connector 
(rear view)

(2) Disconnected the SRS-ECU connector C-131.
(3) Connect the negative battery terminal.
(4) Turn the ignition switch to the "ON" position.

Q: Does the SRS warning lamp illuminate?

YES : 

Go to Step 7.

NO : 

Replace the combination meter (Refer to 
GROUP 54A, Combination Meter Assembly 
). Go to Step 7. 

STEP 7. Check whether the diagnosis code is 
reset.
Check again if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Ignition: "LOCK" (OFF) position to "ON"
(3) On completion, check that the diagnosis code is 

not reset.

Q: Is the diagnosis code set?

YES : 

Replace the SRS-ECU (Refer to 

P.52B-

266

).

NO : 

An intermittent malfunction is suspected 
(Refer to GROUP 00, How to Cope with 
Intermittent Malfunction ).

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-62

Code No.B1551: SRS warning lamp circuit malfunction (Lamp does not Switch Off).

AC806011

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet     PU : Purple

SRS Warning Lamp Drive Circuit

IGNITION
SWITCH (IG1)

COMBINATION
METER

SRS-ECU

AC

OPERATION

• Power for the SRS warning lamp is supplied from 

the ignition switch (IG1) circuit.

• The SRS warning lamp illuminates when the igni-

tion switch is turned to the "ON" position and 
goes out after approximately 7 seconds if there is 
not a malfunction in the SRS system.

DIAGNOSIS CODE SET CONDITIONS

• This diagnosis code will be set if an open circuit 

has occurred in the wiring harness between the 
combination meter and the SRS-ECU.

TROUBLESHOOTING HINTS

• Damaged wiring harnesses of connectors

• Malfunction of the SRS-ECU

• Malfunction of the combination meter