Mitsubishi Galant (2004+). Manual — part 432
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-339
STEP 28. Check the powertrain control module for short
circuit. Measure the resistance at powertrain control
module connector B-19.
CAUTION
A digital multimeter should be used. For details refer to
(1) Disconnect powertrain control module connector B-19, and
measure the resistance at the component side of
powertrain control module connector B-19.
(2) Measure the resistance between powertrain control module
connector terminals 17 and 18.
OK: 120
± 20 Ω
Q: Does the resistance measure 120
± 20 Ω?
YES : If the resistance measures 120
± 20 Ω, diagnose CAN
bus lines thoroughly by referring to
NO : If the resistance does not measure 120
± 20 Ω,
replace the powertrain control module.
AC306248AD
B-19 (B)
CONNECTOR: B-19
PCM
AIR
CLEANER
HARNESS SIDE
AC209438
AC209438
AC209438
AC209438
COMPONENT SIDE: B-19
BD
TEST
HARNESS
TEST
HARNESS
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-340
DIAGNOSTIC ITEM 8: Diagnose shorts between CAN_L and H lines <Vehicles with ABS and vehicles
without multi-center display (middle-grade type)>
CAUTION
When servicing a CAN bus line, ground yourself
by touching a metal object such as an unpainted
water pipe. If you fail to do so, a component con-
nected to the CAN bus line may be damaged.
DATA LINK
CONNECTOR
ETACS-ECU
POWERTRAIN
CONTROL MODULE
JOINT
CONNECTOR (3)
COMBINATION
METER
A/C-ECU
SRS-ECU
NOTE
: MANUAL AIR CONDITIONING SYSTEM <LOW>
: MANUAL AIR CONDITIONING SYSTEM<MIDDLE>
OR AUTOMATIC AIR CONDITIONING SYSTEM
ABS-ECU
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-341
.
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 ohms.
.
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 ABS-ECU may be defective
• The powertrain control module may be defective
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991970: ABS Check Harness
AC305206
CONNECTOR: A-02
AR
A-02 (GR)
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-342
STEP 1. Check intermediate connector C-29 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: Is intermediate connector C-29 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts.
AC305231AI
CONNECTOR: C-29
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