Mitsubishi Galant (2004+). Manual — part 1594
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-269
STEP 3. Using scan tool MB991958, read the diagnostic
trouble code.
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) Turn the ignition switch to the "ON" position.
(2) Check if the DTC is set.
(3) Turn the ignition switch to the "LOOK (OFF)" position.
Q: Is DTC B1540, B1541, B1542, B1543, B1545 or B1546
set?
YES : Carry out the troubleshooting of the occupant
classification-ECU or the occupant classification
sensor system. (Refer to
<B1540, B1541,
B1542, B1543>,
<B1545, B1546>).
NO : Go to Step 4 .
STEP 4. Check the passenger’s air bag OFF indicator light
connector C-06.
Q: Is the connector correctly engaged?
YES : Go to Step 5 .
NO : Engage the connector correctly. Then go to Step 10 .
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC305233CX
CONNECTOR: C-06
HARNESS SIDE
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-270
STEP 5. Measure the voltage at passenger’s air bag OFF
indicator light connector C-06.
(1) Disconnect passenger’s air bag OFF indicator light
connector C-06.
(2) Measure the voltage between C-06 harness side connector
terminal 1 and body ground.
Voltage should measure approximately 12 volt.
Q: Is the check result satisfactory?
YES : Go to Step 7 .
NO : Go to Step 6 .
STEP 6. Check the harness for short circuit between
ignition switch connector C-308 (terminal No.2) and
passenger’s air bag OFF indicator light C-06 (terminal
No.1).
AC305233CX
CONNECTOR: C-06
HARNESS SIDE
AC308205
C-06 HARNESS SIDE
CONNECTOR
AB
AC305235AG
CONNECTOR: C-308
C-308
2
5
4
1
6
3
AC305233CX
CONNECTOR: C-06
HARNESS SIDE
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-271
NOTE: After inspecting intermediate connectors C-211 and
C-215 inspect the wiring harness. If intermediate connectors
C-211 and C-215 are damaged, repair or replace them. Refer
to GROUP 00E, Harness Connector Inspection
. Then
go to Step 10 .
Q: Are the harness wires between Ppassenger’s air bag
OFF indicator light connector C-06 (terminal No.1) and
the ignition switch connector C-308 (terminal No.2) in
good condition?
YES : Go to Step 7 .
NO : Repair the harness wires. Then go to Step 10 .
STEP 7. Check SRS-ECU connector C-121.
Q: Is the connector correctly engaged?
YES : Go to Step 8 .
NO : Engage the connector correctly. Then go to Step 10 .
AC305416
CONNECTORS: C-211, C-215
JUNCTION BLOCK
(FRONT VIEW)
C-215
C-211
HARNESS SIDE
C-211
HARNESS SIDE
C-215
AK
AC305362
CONNECTOR: C-121
C-121 (Y)
AH
SRS-ECU
C-121
HARNESS SIDE
CONNECTOR
(REAR VIEW)
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
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-272
STEP 8. Check the harness for short circuit between
passenger’s air bag OFF indicator light C-06 (terminal
No.3) and SRS-ECU connector C-121 (terminal No.21).
NOTE: After inspecting intermediate connector C-22 inspect
the wiring harness. If intermediate connector C-22 is damaged,
repair or replace them. Refer to GROUP 00E, Harness Con-
nector Inspection
. Then go to Step 10 .
Q: Are the harness wires between SRS-ECU connector
C-121 (terminal No.21) and the passenger’s air bag OFF
indicator light C-06 (terminal No.3) in good condition?
YES : Go to Step 9 .
NO : Repair the harness wires. Then go to Step 10 .
AC305233CX
CONNECTOR: C-06
HARNESS SIDE
AC305362
CONNECTOR: C-121
C-121 (Y)
AH
SRS-ECU
C-121
HARNESS SIDE
CONNECTOR
(REAR VIEW)
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
AC305233 AI
CONNECTOR: C-22
C-22 (Y)
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