Mitsubishi Grandis. Manual — part 564
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-354
Diagnostic Item 11: Diagnose the lines between CAN_L and CAN_H for short circuit <RH 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-355
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
AC310628AB
Connector: C-125 <RHD>
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-356
STEP 2. Resistance measurement at the C-125
intermediate 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 connector, and measure at its
male-side intermediate connector (at the front
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
disconnected.
(4) Resistance between C-125 intermediate
connector terminal Nos.26 and 27
OK: 120
± 20 Ω
Q: Is the check result normal?
YES :
<Within 120
± 20 Ω> Go to Step 3 .
NO :
<Not within 120
± 20 Ω> Go to Step 26 .
STEP 3. Connector check: C-09 joint connector
(CAN2)
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: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair a defective connector or replace the
joint connector.
AC310628AB
Connector: C-125 <RHD>
AC204740
AC204740
AC204740
AC204740
AC204740DC
Male side: C-125
Test
harness
AC310628AY
Connector: C-09 <RHD>
C-09 (GR)
Harness side
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
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54D-357
STEP 4. Resistance measurement at C-09 joint
connector (CAN2).
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 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
disconnected.
(4) Resistance between C-09 joint connector (CAN2)
terminal Nos. 6 and 17
OK: 120
± 20 Ω
(5) Resistance between C-09 joint connector (CAN2)
terminal Nos. 8 and 19
OK: 1 k
Ω or more
(6) Resistance between C-09 joint connector (CAN2)
AC310628AY
Connector: C-09 <RHD>
C-09 (GR)
Harness side
AC204740DI
Harness side: C-09
Test
harness
Test
harness
AC204740DO
Harness side: C-09
Test
harness
Test
harness
AC204740DG
Harness side: C-09
Test
harness
Test
harness
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст