Mitsubishi Evolution X. Manual — part 1120
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-115
STEP 2. Check the wiring harness between joint connector
(CAN2) C-104 and ETACS-ECU connector C-301 for open
circuit.
CAUTION
Strictly observe the specified wiring harness repair proce-
dure. For details refer to
(1) Disconnect joint connector (CAN2) C-104 and ETACS-ECU
connector C-301, and check the wiring harness.
(2) Check the wiring harness between joint connector (CAN2)
C-104 (terminal 6) and ETACS-ECU connector C-301
(terminal 9)
OK: Continuity exists (2
Ω or less)
(3) Check the wiring harness between joint connector (CAN2)
C-104 (terminal 19) and ETACS-ECU connector C-301
(terminal 8)
OK: Continuity exists (2
Ω or less)
Q: Is the wiring harness between joint connector (CAN2)
C-104 and ETACS-ECU connector C-301 in good
condition?
YES : Go to Step 3.
NO : Repair the wiring harness between joint connector
(CAN2) C-104 and ETACS-ECU connector C-301.
AC709707BP
Harness side: C-104
TEST
HARNESS
Harness side: C-301
TEST
HARNESS
AC709707BQ
Harness side: C-104
TEST
HARNESS
Harness side: C-301
TEST
HARNESS
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-116
STEP 3. Using scan tool MB991958, diagnose the CAN bus
line.
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) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose CAN bus lines, and check if the scan tool screen
is as shown in the illustration.
Q: Does the scan tool screen correspond to the
illustration?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to use
Troubleshooting/inspection Service Points
− How to
Cope with Intermittent Malfunction
NO : Replace the ETACS-ECU.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
AC709542 AB
: Red section on screen
M.U.T.
J/C (3)
SAS
J/C (2)
KOS/WCM
SRS
A/C
AUDIO
MMCS
Sat Radio
HFM
OCM
METER
ASC
ENGINE
J/C (1)
ETACS
<M/T>
S-AWC
AC709543 AB
: Red section on screen
M.U.T.
J/C (3)
SAS
J/C (2)
KOS/WCM
SRS
A/C
AUDIO
MMCS
Sat Radio
HFM
OCM
METER
ASC
LEVER
ENGINE
J/C (1)
ETACS
<TC-SST>
S-AWC
TC-SST
J/C (4)
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-117
DIAGNOSTIC ITEM 13: Diagnose the lines between joint connector (CAN2) and joint connector
(CAN3).
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-C Communication Circuit <M/T>
ETACS-ECU
INTERFACE
CIRCUIT
CAN DRIVE
CIRCUIT
JOINT CONNECTOR
(CAN2)
JOINT CONNECTOR
(CAN3)
ASC-ECU
STEERING
WHEEL SENSOR
S-AWC-ECU
ENGINE
CONTROL
MODULE
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-118
TRANSAXLE
ASSEMBLY
ENGINE
CONTROL
MODULE
CAN-C Communication Circuit <TC-SST>
ETACS-ECU
INTERFACE
CIRCUIT
CAN DRIVE
CIRCUIT
JOINT CONNECTOR
(CAN2)
JOINT CONNECTOR
(CAN3)
JOINT CONNECTOR
(CAN4)
SHIFT LEVER
ASC-ECU
STEERING
WHEEL SENSOR
S-AWC-ECU
NOTE
: THE TERMINAL NUMBERS DESCRIBED
IN THE CIRCUIT DIAGRAM AGREE WITH
THE NUMBERS MAKED ON THE
TRANSAXLE ASSEMBLY CONNECTOR AND
HARNESS SIDE CONNECTOR.
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