Mitsubishi Galant 9G. Manual — part 1266
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-168
.
TROUBLE JUDGMENT
A short to ground may be present when the voltage
between the CAN bus line (CAN_L or CAN_H) and
body ground is less than 1.0 V. In this condition, an
abnormal voltage may be measured at CAN_L and
CAN_H lines.
.
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
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
• the ETACS-ECU may be defective
• The combination meter may be defective
• The A/C-ECU may be defective
• The SRS-ECU may be defective
• The powertrain control module may be defective
AC306248AB
B-19 (B)
CONNECTOR: B-19
AIR
CLEANER
PCM
AC305231BZ
C-101
C-125 (B)
C-29
C-02
CONNECTORS: C-02, C-29, C-101, C-125
AC305233 AU
CONNECTORS: C-10, C-15, C-22, C-121
C-121 (Y)
C-22 (Y)
C-10 (B)
C-15 (B)
AC305413
C-218 (GR)
CONNECTOR: C-218
AJ
JUNCTION BLOCK
(REAR VIEW)
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-169
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check powertrain control module connector B-19,
combination meter connector C-101 and data link
connector C-125 for loose, corroded or damaged
terminals, or terminals pushed back in the connector.
CAUTION
The strand end of the twisted wire should be within 10 cm
(4 inches) from the connector. For details refer to
Q: Are powertrain control module connector B-19,
combination meter connector C-101 and data link
connector C-125 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts.
AC306248AD
B-19 (B)
CONNECTOR: B-19
PCM
AIR
CLEANER
HARNESS SIDE
AC305232
CONNECTORS: C-101, C-125
AH
C-101
C-125
C-125 (B)
C-101 HARNESS SIDE
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-170
STEP 2. Check the CAN_H-side bus line (communication
line including ECUs) for short to ground. Measure the
resistance at data link connector C-125.
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 powertrain control module connector B-19 and
combination meter connector C-101, and measure the
resistance at the harness side of data link connector C-125.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
CAUTION
Disconnect the negative battery terminal. For details refer
to
(3) Disconnect the negative battery terminal.
AC306248AD
B-19 (B)
CONNECTOR: B-19
PCM
AIR
CLEANER
HARNESS SIDE
AC305232
CONNECTORS: C-101, C-125
AH
C-101
C-125
C-125 (B)
C-101 HARNESS SIDE
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-171
(4) Measure the resistance between data link connector
terminal 6 and body ground.
OK: 1 k
Ω or more
Q: Does the resistance measure 1 k
Ω or more?
YES : If the resistance measures 1 k
Ω or more, go to Step 3
.
NO : If the resistance measures less than 1 k
Ω, go to Step
AC209364
Y
8
16
15
7
5
1314
6
12
4
2
1011
3
9
1
AC209364
AC209364
AC209364
AC209364
AC209364HT
HARNESS SIDE: C-125
TEST
HARNESS
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст