Mitsubishi Grandis. Manual — part 1027

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-160

STEP 5. Connector check: SRS-ECU connector
C-119, ignition switch connector C-307, joint
connector C-01 <LHD: diagnosis code B1477>,
joint connector C-33 <RHD: diagnosis code
B1477>, junction block connector C-202 and
C-205.

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-161

Q: Is the check result normal?

YES :

Check the harness wire for open circuit

between SRS-ECU connector C-119
(terminal No.24 <B1476> or terminal No.23
<B1477>) and the ignition switch connector
C-307 (terminal No.2), and repair if
necessary. Then go to Step 10.

NO :

Repair or replace it. Then go to Step 10.

AC311438 AD

C-119 (Y)

Connector: C-119

Harness side
(front view)

AC313147AD

Connector: C-307 <LHD>

C-307

2
5

4

1

6

3

AC313148

AD

Connector: C-307<RHD>

C-307

2
5

4

1

6

3

AC310613

AE

Connector: C-01 <LHD>

AC310631BD

Connector: C-33 <RHD>

AC310624

Connectors: C-202, C-205 <LHD>

AF

Junction block (Front view)

C-205

C-202

C-205

Harness side

C-202

Harness side

AC310619

Connectors: C-202, C-205 <RHD>

AF

Junction block (Front view)

C-205

C-202

C-205

Harness side

C-202

Harness side

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-162

STEP 6. Check a burned-out fuse.
(1) Replace the fuse.
(2) Turn the ignition switch to the "ON" position, wait

for at least one minute and then turn the ignition
switch to the "LOCK" (OFF) position.

(3) Check the fuse.

Q: Is the fuse in good condition?

YES :

Go to Step 10.

NO :

It is possible that the circuit using fuse No.2
<B1476> or No.3 <B1477> is shorted, go to
Step 7.

STEP 7. Check the SRS-ECU power supply
circuit for short circuit to earth. Resistance
measurement at the junction block connector
C-205.

(1) Disconnect junction block connector C-205, and

measure at the wiring harness side.

CAUTION

Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(2) Measure the resistance between terminal 24

<B1476> or 7 <B1477> and body earth.

OK: Open circuit

Q: Is the check result normal?

YES :

Check the other circuit, which flows through

fuse No.2 <B1476> or fuse No.3
<B1477>.Then go to Step 10.

NO :

Go to Step 8.

STEP 8. Check the power supply circuit for short
circuit to earth. Resistance measurement at the
SRS-ECU connector C-119.

(1) Disconnect SRS-ECU connector C-119, and

AC310623

Connector: C-205 <LHD>

AM

Harness side

Junction block (Front view)

AC310618

Connectors: C-205 <RHD>

AL

Harness side

Junction block (Front view)

AC308200

1 2 3 4 5 6 7 8 9 10 1112 1314

1516 1718 19 20 212223 242526 2728

C-205 Harness side
connector (rear view)

AC

AC311438 AD

C-119 (Y)

Connector: C-119

Harness side
(front view)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-163

measure at the wiring harness side.

CAUTION

Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(2) Measure the resistance between terminal 24

<B1476> or 23 <B1477> and body earth.

OK: Open circuit

Q: Does continuity exist?

YES :

Erase the diagnosis code memory, and

check the diagnosis code. If diagnosis code
B1476 or B1477 sets, replace the
SRS-ECU. (Refer to

P.52B-223

). Then go to

Step 10.

NO :

Go to Step 9.

AC308195

42

31

38

27

21

41

28

39

22

30

25

47

36

33

44

34

45

37

48

26

29

23

40

32

43

35

46

24

B

A

C-119 Harness side
connector (rear view)

AD