Mitsubishi Colt Ralliart. Manual — part 560

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-78

DIAGNOSIS CODE 43: SRS warning lamp circuit open-circuited (Lamp does not Illuminate).

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 the SRS warning
lamp driving circuit is short to earth. However, if the
vehicle condition returns to normal, diagnosis code
43 will be automatically erased, and the SRS warn-
ing lamp will go out.

AC510235

IGNITION
SWITCH (IG1)

COMBINATION
METER

METER
AND
A/C-ECU

SRS-ECU

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

SRS Warning Lamp Drive Circuit

AB

Main

Index

Group

TOC

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-79

PROBABLE CAUSES

• Damaged wiring harnesses of connectors

• Malfunction of the SRS-ECU

• Malfunction of the combination meter

DIAGNOSIS PROCEDURE

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

(2) Disconnected the SRS-ECU connector B-35.
(3) Connect the negative battery terminal.
(4) Turn the ignition switch to the "ON" position.

Q: Does the warning lamp illuminate?

YES :

Go to Step 3.

NO :

Go to Step 2.

STEP 2. Check the harness for short circuit to
earth between ignition switch connector B-141
(terminal No.2) and combination meter B-14
(terminal No.31) and between combination meter
B-14 (terminal No.26) and SRS-ECU connector
B-35 (terminal No.18).

AC206285

AF

B-35 (Y)

Connector: B-35

Harness side
connector
(rear view)

AC313828 AG

Connector: B-141

Harness side
connector
(front view)

Clock spring

AC313822 AP

Connector: B-14

Harness side
connector
(rear view)

B-14 (B)

AC206285

AF

B-35 (Y)

Connector: B-35

Harness side
connector
(rear view)

Main

Index

Group

TOC

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-80

NOTE:

Prior to the wiring harness inspection, check junction
connector B-129, B-131 junction connector B-22 and
repair if necessary.

Q: Is the check result normal?

YES : .

Replace the combination meter (Refer to

GROUP 54A, Combination Meters
Assembly

P.54A-67

).

NO : .

Repair the harness wires between

SRS-ECU connector B-35 (terminal No.18)
and ignition switch connector (terminal
No.2).

STEP 3. Check whether the diagnosis code is
reset.

Q: Is diagnosis code 43 set?

YES :

Replace the SRS-ECU (Refer to

P.52B-143

).

NO :

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

P.00-13

).

AC313827AH

B-131

B-131

B-129

Connectors: B-129, B-131

Junction block (Rear view)

Harness side

Harness side

B-129

AC313822 AQ

Connector: B-22

Main

Index

Group

TOC

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-81

diagnosis code 43: SRS warning lamp circuit open-circuited (Lamp does not Switch Off).

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
SRS warning lamp and the SRS-ECU. However,
if the vehicle condition returns to normal, diagno-
sis code 43 will be automatically erased, and the
SRS warning lamp will go out.

AC510235

IGNITION
SWITCH (IG1)

COMBINATION
METER

METER
AND
A/C-ECU

SRS-ECU

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

SRS Warning Lamp Drive Circuit

AB

Main

Index

Group

TOC