Mitsubishi Evolution X. Manual — part 1117
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-103
STEP 2. Check the wiring harness between joint connector
(CAN3) C-127 and ASC-ECU connector A-05 for open
circuit.
CAUTION
Strictly observe the specified wiring harness repair proce-
dure. For details refer to
(1) Disconnect joint connector (CAN3) C-127 and ASC-ECU
connector A-05, and check the wiring harness.
(2) Check the wiring harness between joint connector (CAN3)
C-127 (terminal 6) and ASC-ECU connector A-05 (terminal
12)
OK: Continuity exists (2
Ω or less)
(3) Check the wiring harness between joint connector (CAN3)
C-127 (terminal 19) and ASC-ECU connector A-05
(terminal 13)
OK: Continuity exists (2
Ω or less)
Q: Is the wiring harness between joint connector (CAN3)
C-127 and ASC-ECU connector A-05 in good condition?
YES : Check the power supply circuit of the ASC-ECU.
Refer to GROUP 35C, Troubleshooting
NO : Repair the wiring harness between joint connector
(CAN3) C-127 and ASC-ECU connector A-05.
AC709707
Harness side: C-127
BN
Harness side: A-05
TEST
HARNESS
TEST
HARNESS
AC709707
Harness side: C-127
BO
Harness side: A-05
TEST
HARNESS
TEST HARNESS
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-104
DIAGNOSTIC ITEM 10: Diagnose when the scan tool cannot receive the data sent by ECM.
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-105
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.
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-106
.
FUNCTION
If the scan tool MB991958 cannot communicate with
the ECM, this diagnosis result will be set.
.
TROUBLE JUDGEMENT CONDITIONS
If a communication flag is not set for the ECM, the
ETACS-ECU determines that there is a failure.
.
TROUBLESHOOTING HINTS
• Malfunction of the connector [joint connector
(CAN3) <M/T>, joint connector (CAN4)
<TC-SST>, ECM connector or intermediate con-
nector <TC-SST> improperly connected]
• Malfunction of the wiring harness [open circuit
between the ECM connector and the joint con-
nector (CAN3) <M/T> or the joint connector
(CAN4) <TC-SST>, power supply circuit to the
ECM]
• Malfunction of the ECM
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB992110: Power plant ECU check harness
STEP 1. Check joint connector (CAN3) C-127 <M/T>, joint
connector (CAN4) A-14 <TC-SST>, ECM connector B-10
and intermediate connector A-13 <TC-SST> 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 (CAN3) C-127 <M/T>, joint
connector (CAN4) A-14 <M/T>, ECM connector B-10 and
intermediate connector A-13 <TC-SST> in good
condition?
YES : Go to Step 2.
NO : Repair the damaged parts.
AC708949AL
Connectors: A-13, A-14
A-14
A-13
AC709137
Connector: B-10
AB
C-10 (GR)
AC708951CC
Connector: C-127
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