Mitsubishi Grandis. Manual — part 627
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-606
Diagnostic Item 35: Diagnose the lines from the main bus line to the SRS-ECU <RH drive vehicles>
CAUTION
When servicing a CAN bus line, earth yourself by
touching a metal object such as an unpainted
water pipe. If you fail to do, a component
connected to the CAN bus line may be broken.
TROUBLE JUDGMENT
If the MUT-III can not received signal from the
SRS-ECU, CAN bus line connector(s) are broken or
an open circuit has occurred.
COMMENTS ON TROUBLE SYMPTOM
The wiring harness wire or connectors may have
loose, corroded, or damage terminals, or terminals
pushed back in the connector, or the SRS-ECU may
be defective.
ENGINE-ECU<M/T>
ENGINE·A/T-ECU<A/T>
COMBINATION
METER
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 : Gray R : Red P : Pink V : Violet
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-607
POSSIBLE CAUSES
• Damaged harness wires and connectors
• Malfunction of the SRS-ECU
DIAGNOSTIC PROCEDURE
STEP 1. Connector check: C-09 joint connector
(CAN2) connector and C-119 SRS-ECU connector
CAUTION
The strand end of the twist wire should be within
10 cm from the connector. For details refer to
When checking the joint connector, ensure that its
wiring harness side and its short pins are not
damaged.
Q: Are the check result normal?
YES :
Go to Step 2 .
NO :
Repair a defective connector or replace the
joint connector.
STEP 2. Resistance measurement at C-09 joint
connector (CAN2) and C-119 SRS-ECU
connector.
CAUTION
A digital multimeter should be used. For details
refer to
.
CAUTION
The test wiring harness should be used. For
details refer to
(1) Disconnect the joint connector (CAN2) and the
SRS-ECU connector, and measure at the wiring
harness side.
(2) Ignition switch: OFF (LOCK)
CAUTION
When measuring the resistance, disconnect the
negative battery terminal. For details refer to
(3) Ensure that the negative battery terminal is
AC310628AY
Connector: C-09 <RHD>
C-09 (GR)
Harness side
AC310631AZ
Connector: C-119 <RHD>
Harness side
C-119 (Y)
48
37
26
42
31
45
34
47
36
46
35
44
33
43
32
25 24
39
28
41
30
40
29
38
27
23
21
22
A
B
AC209350
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
19
9
20
10
21
11
22
AB
Short pin
AC310628AY
Connector: C-09 <RHD>
C-09 (GR)
Harness side
AC310631AZ
Connector: C-119 <RHD>
Harness side
C-119 (Y)
48
37
26
42
31
45
34
47
36
46
35
44
33
43
32
25 24
39
28
41
30
40
29
38
27
23
21
22
A
B
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-608
disconnected.
(4) Continuity between C-09 joint connector (CAN2)
terminal No.4 and C-119 SRS-ECU connector
terminal No.32
OK: 2 ohms or less
(5) Continuity between C-09 joint connector (CAN2)
terminal No.15 and C-119 SRS-ECU connector
terminal No.43
OK: 2 ohms or less
CAUTION
Strictly observe the specified wiring harness
repair procedure. For details refer to
Q: Are the check result normal?
YES :
<All the resistances measure 2
Ω or less>
Power supply to the SRS-ECU may be
suspected. Diagnose the SRS system.
Refer to
NO :
<Either or all of the voltages measure more
than 2
Ω> Repair the wiring harness
between the joint connector (CAN2) and the
SRS-ECU connector.
AC312553
Harness side: C-09
Test
harness
Harness side: C-119
Test
harness
BP
AC312553 BQ
Test
harness
Harness side: C-09
Test
harness
Harness side: C-119
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-609
Diagnostic Item 36: Diagnose the lines from the main bus line to the steering wheel angle sensor <LH
drive vehicles>
CAUTION
When servicing a CAN bus line, earth yourself by
touching a metal object such as an unpainted
water pipe. If you fail to do, a component
connected to the CAN bus line may be broken.
ENGINE-ECU<M/T>
ENGINE·A/T-ECU<A/T>
COMBINATION
METER
STEERING
WHEEL
ANGLE
SENSOR
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
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