Mitsubishi Outlander GS45X. Manual — part 1283
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-77
STEP 13. Using scan tool MB991958, diagnose the CAN
bus line. (checking the ABS-ECU <vehicles without ASC>
or ASC-ECU <vehicles with ASC> for internal short to
ground)
CAUTION
Strictly observe the specified wiring harness repair proce-
dure. For details refer to
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Disconnect ABS-ECU connector A-01 <vehicles without
ASC> or ASC-ECU connector A-02 <vehicles with ASC>.
(2) Connect scan tool MB991958 to the data link connector.
(3) Turn the ignition switch to the "ON" position.
(4) Diagnose CAN bus lines, and check if the scan tool
MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as
shown in the figure.
Q: Does scan tool MB991958 screen correspond to the
illustration?
YES : Repair the wiring harness between ABS-ECU
connector A-01 <vehicles without ASC> or ASC-ECU
connector A-02 <vehicles with ASC> and joint
connector (CAN3) C-01.
NO : Check ABS-ECU connector A-01 <vehicles without
ASC> or ASC-ECU connector A-02 <vehicles with
ASC>, and repair if necessary. If the ABS-ECU
connector <vehicles without ASC> or ASC-ECU
connector <vehicles with ASC> is in good condition,
replace the ABS-ECU <vehicles without ASC> or
ASC-ECU <vehicles with ASC>.
ZC501967
AC404789
AC702802
MB991824
MB991827
MB991910
Data link
connector
AB
ACA02847AC
: Red section on screen
M.U.T.
F.A.S.T.
/WCM
SRS
OCM
A/C
AUDIO
MMCS
Sat Radio
METER
JC
ETACS
JC
JC
SAS
AWC
ABS/ASC
AT/CVT
ENGINE
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-78
STEP 14. Using scan tool MB991958, diagnose the CAN
bus line. (checking the TCM for internal short to ground)
CAUTION
Strictly observe the specified wiring harness repair proce-
dure. For details refer to
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Disconnect TCM connector C-38.
(2) Connect scan tool MB991958 to the data link connector.
(3) Turn the ignition switch to the "ON" position.
(4) Diagnose CAN bus lines, and check if the scan tool
MB991958 screen is as shown in the figure.
OK: The display of the scan tool MB991958 is as
shown in the figure.
Q: Does scan tool MB991958 screen correspond to the
illustration?
YES : Repair the wiring harness between TCM connector
C-38 and joint connector (CAN3) C-01.
NO : Check TCM connector C-38, and repair if necessary.
If the TCM connector is in good condition, replace the
TCM.
ZC501967
AC404789
AC702802
MB991824
MB991827
MB991910
Data link
connector
AB
ACA02847AC
: Red section on screen
M.U.T.
F.A.S.T.
/WCM
SRS
OCM
A/C
AUDIO
MMCS
Sat Radio
METER
JC
ETACS
JC
JC
SAS
AWC
ABS/ASC
AT/CVT
ENGINE
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-79
DIAGNOSTIC ITEM 6: Diagnose when the scan tool cannot receive the data sent by AWD-ECU
<Electronic controlled AWD>.
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 connected to the CAN bus line may be damaged.
CAN Communication Circuit
ETACS-ECU
INTERFACE
CIRCUIT
CAN DRIVE
CIRCUIT
STEERING WHEEL
SENSOR
AWD-ECU
AWC-ECU
JOINT CONNECTOR
(CAN2)
JOINT CONNECTOR
(CAN3)
TRANSAXLE
CONTROL MODULE
ASC-ECU
ABS-ECU
ENGINE CONTROL
MODULE
:VEHICLES WITHOUT ASC
NOTE
:VEHICLES WITH ASC
:6A/T
:CVT
:ELECTRONIC CONTROLLED AWD
:S-AWC
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-80
.
FUNCTION
If the scan tool MB991958 cannot communicate with
the AWD-ECU, this diagnosis result will be set.
.
TROUBLE JUDGMENT CONDITIONS
If a communication flag is not set for the AWD-ECU,
the ETACS-ECU determines that there is a failure.
.
TROUBLESHOOTING HINTS
• Malfunction of the connector [joint connector
(CAN2) or AWD-ECU connector improperly con-
nected]
• Malfunction of the wiring harness [open circuit
between the AWD-ECU and the joint connector
(CAN2), power supply circuit to the AWD-ECU]
• Malfunction of the AWD-ECU
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
STEP 1. Check joint connector (CAN2) C-04, AWD-ECU
connector C-128, intermediate connector C-138 and
intermediate connector C-31 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 joint connector (CAN2) C-04, AWD-ECU connector
C-128, intermediate connector C-138 and intermediate
connector C-31 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts.
AC901075 AQ
C-04
C-31
Connectors: C-04, C-31, C-128, C-138
C-128
C-138 (BR)
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