Mitsubishi Grandis. Manual — part 551
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-302
disconnected.
(3) Resistance between A-07 joint connector (CAN1)
terminal No.5 and body earth
OK: 1 k
Ω or more
CAUTION
Strictly observe the specified wiring harness
repair procedure. For details refer to
Q: Is the check result normal?
YES :
<1 k
Ω or more> Follow diagnostic item 20,
Diagnose CAN bus lines thoroughly. Refer
to
NO :
<less than 1 k
Ω> Repair the wiring harness
between the joint connector (CAN1) and the
ASC-ECU connector.
STEP 56. Resistance measurement at the A-07
joint connector (CAN1).
NOTE: When checking A-07 joint connector (CAN1),
disassemble and check the engine compartment
relay box by referring to
.
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 (CAN1) and the
intermediate connector, and measure at the
wiring harness side.
CAUTION
When measuring the resistance, disconnect the
negative battery terminal. For details refer to
(2) Ensure that the negative battery terminal is
AC209364
Harness side: A-07
AC209364MA
Test harness
AC302572AD
Connector: A-07
Harness side
AC310628AB
Connector: C-125 <RHD>
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-303
disconnected.
(3) Resistance between A-07 joint connector (CAN1)
terminal No.4 and body earth
OK: 1 k
Ω or more
CAUTION
Strictly observe the specified wiring harness
repair procedure. For details refer to
Q: Is the check result normal?
YES :
<1 k
Ω or more> Follow diagnostic item 20,
Diagnose CAN bus lines thoroughly. Refer
to
.
NO :
<less than 1 k
Ω> Repair the wiring harness
between the joint connector (CAN1) and the
intermediate connector.
AC209364
Harness side: A-07
AC209364MC
Test
harness
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-304
Diagnostic Item 9: Diagnose the lines between CAN_L and CAN_H for short circuit <LH drive vehicles
without ASC>
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.
A/C-ECU
CENTER DISPLAY
COMBINATION
METER
DIAGNOSIS
CONNECTOR
ABS-ECU
ENGINE-ECU<M/T>
ENGINE·A/T-ECU<A/T>
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-305
TROUBLE JUDGMENT
Short circuit may be present between the CAN_L
and H lines when the resistance between the CAN
bus lines (CAN_L and H lines) is less than 2
Ω.
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 a ECU may be
defective.
TROUBLESHOOTING HINTS
• Damaged harness wires and connectors
• Malfunction of the ETACS-ECU
• Malfunction of the combination meter
• Malfunction of the A/C-ECU
• Malfunction of the SRS-ECU
• Malfunction of the multi-centre display
• Malfunction of the ABS-ECU
• Malfunction of the engine-ECU <M/T> or
engine-A/T-ECU <A/T>
DIAGNOSTIC PROCEDURE
STEP 1. Connector check: C-125 intermediate
connector
CAUTION
The strand end of the twist wire should be within
10 cm from the connector. For details refer to
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
ETACS-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 : Gray R : Red P : Pink V : Violet
AC310613
AD
Connector: C-125 <LHD>
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