Mitsubishi Montero (2002-2004). Manual — part 796
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-53
DTC SET CONDITIONS
This DTC is set if the voltage between the IG1 termi-
nals (fuse No.6 circuit) and ground is lower than a
predetermined value for a continuous period of five
second or more. However, if the vehicle condition
returns to normal, DTC number 41 will be automati-
cally erased, and the SRS warning light will switch
off.
.
TROUBLESHOOTING HINTS
• Damaged wiring harnesses or connectors
• Malfunction of the SRS-ECU
.
DIAGNOSIS
Required Special Tools:
• MB991502: Scan Tool (MUT-ll)
• MB991223 (MB991222): Harness set (Probe)
STEP 1. Check junction block fuse number 6.
Q: Is the fuse burned out?
NO : Go to Step 2.
YES : Go to Step 4.
STEP 2. Check the circuit between the SRS-ECU and the
ignition switch (IG1).
(1) Disconnect the negative battery terminal.
(2) Disconnect SRS-ECU connector E-08.
(3) Connect the negative battery terminal.
(4) Turn the ignition switch to the "ON" position.
CAUTION
Do not insert a test probe into the terminal from its front
side directly as the connector contact pressure may be
weakened.
(5) Measure the Voltage between E-08 harness connector
terminal 16 and body ground.
Voltage should measure 9 volts or more.
Q: Is the measured voltage within the specified range?
YES : Erase the diagnostic trouble code memory, and check
the diagnostic trouble code. If DTC 41 sets, replace
the SRS-ECU. (Refer to
.) Then go to Step
10.
NO : Go to Step 3.
AC203896AC
JUNCTION
BLOCK
FUSE No.6
ACX01478 AD
CONNECTOR: E-08
13 14 15 16 17 18 19 20
5 6 7 8 9 10 11 12
1 2
3 4
AC203786AC
E-08 HARNESS
CONNECTOR:
HARNESS SIDE
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-54
STEP 3. Check the harness for open circuit between SRS-
ECU connector E-08 (terminal No.16) and the ignition
switch connector D-204 (terminal No.2).
NOTE: After inspecting junction block connectors D-210 and D-
208, inspect the wiring harness. If junction block connectors
are damaged, repair or replace them. (Refer to GROUP 00E,
Harness Connector Inspection
.) Then go to Step 10.
Q: Are harness between SRS-ECU connector E-08
(terminal No.16) and the ignition switch connector D-
204 (terminal No.2) in good condition?
YES : Go to Step 10.
NO : Repair the harness wire between SRS-ECU
connector E-08 and the ignition switch connector D-
204. Then go to Step 10.
AC204257
CONNECTORS : D-208, D-210
AB
D-210
D-208
D-208 HARNESS CONNECTOR:
COMPONENT SIDE
D-210 HARNESS CONNECTOR:
COMPONENT SIDE
1
2
3
5
6
4
JUNCTION BLOCK
(FRONT VIEW)
5 4
3 2
12
13
10
11
7
8
1
6
9
ACX01478AH
CONNECTOR: E-08
E-08 (Y)
HARNESS
CONNECTOR:
HARNESS SIDE
AC204226AE
CLOCK SPRING
CONNECTOR: D-204
D-204
HARNESS
CONNECTOR:
COMPONENT
SIDE
2
5
6
3
4
1
SRS AIR BAG DIAGNOSIS
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-55
STEP 4. 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 : Then go to Step 10.
NO : Go to Step 5.
STEP 5. Check the harness for short circuit to ground
between the SRS-ECU and the junction block.
(1) Disconnect junction block connector D-210, and measure at
the wiring harness.
CAUTION
Do not insert a test probe into the terminal from its front
side directly as the connector contact pressure may be
weakened.
(2) Check for continuity between D-210 harness connector
terminal 2 and body ground.
It should be open circuit.
Q: Does continuity exist?
YES : Go to Step 6.
NO : Go to Step 8.
ACX01632
CONNECTOR: D-210
JUNCTION BLOCK
(FRONT VIEW)
AH
D-210
AC204259
1 2 3
4
12
9
8
7
6
10
5
13
11
AB
D-210 HARNESS
CONNECTOR:
HARNESS SIDE
SRS AIR BAG DIAGNOSIS
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DIAGNOSIS
52Bb-56
STEP 6. Check the fuse number 6-related circuit at
junction block connector C-205.
(1) Disconnect junction block connector D-210, and measure at
the wiring harness.
CAUTION
Do not insert a test probe into the terminal from its front
side directly as the connector contact pressure may be
weakened.
(2) Check for continuity between D-210 harness connector
terminal 1 and body ground.
It should be open circuit.
Q: Does continuity exist?
YES : Check the other circuit, which flows through multi-
purpose fuse number 6.
NO : Go to Step 7.
ACX01632
CONNECTOR: D-210
JUNCTION BLOCK
(FRONT VIEW)
AH
D-210
AC204260
1 2 3
4
12
9
8
7
6
10
5
13
11
AB
D-210 HARNESS
CONNECTOR:
HARNESS SIDE
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