Mitsubishi Evolution X. Manual — part 1118

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-107

STEP 2. Check the wiring harness between joint connector
(CAN3) C-127 <M/T> or joint connector (CAN4) A-14
<TC-SST> and ECM connector B-10.

CAUTION

Strictly observe the specified wiring harness repair proce-
dure. For details refer to

P.54C-7

.

(1) Disconnect joint connector (CAN3) C-127 and ECM

connector B-10, and check the wiring harness.

(2) Check the wiring harness between joint connector (CAN3)

C-127 (terminal 4) and ECM connector B-10 (terminal 90)
<M/T>

OK: Continuity exists (2

Ω or less)

(3) Check the wiring harness between joint connector (CAN3)

C-127 (terminal 15) and ECM connector B-10 (terminal 91)
<M/T>

OK: Continuity exists (2

Ω or less)

AC709746

AC709746

Harness side: C-127

AB

Harness side: B-10

TEST
HARNESS

TEST
HARNESS

AC709746

Harness side: C-127

AC

Harness side: B-10

TEST
HARNESS

TEST
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-108

(4) Check the wiring harness between joint connector (CAN4)

A-14 (terminal 7) and ECM connector B-10 (terminal 90)
<TC-SST>

OK: Continuity exists (2

Ω or less)

(5) Check the wiring harness between joint connector (CAN4)

A-14 (terminal 20) and ECM connector B-10 (terminal 91)
<TC-SST>

OK: Continuity exists (2

Ω or less)

Q: Is the wiring harness between joint connector (CAN3)

C-127 <M/T> or joint connector (CAN4) A-14 <TC-SST>
and ECM connector B-10 in good condition?
YES : Check the power supply circuit of the ECM. Refer to

GROUP 13A, MFI Diagnosis .

NO : Repair the wiring harness between joint connector

(CAN3) C-127 <M/T> or joint connector (CAN4) A-14
<TC-SST> and ECM connector B-10.

AC709746

Harness side: A-14

AD

Harness side: B-10

TEST
HARNESS

TEST
HARNESS

AC709746

Harness side: A-14

AE

Harness side: B-10

TEST
HARNESS

TEST
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-109

DIAGNOSTIC ITEM 11: Diagnose when the scan tool cannot receive the data sent by TC-SST-ECU.

<TC-SST>

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.

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

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-110

.

FUNCTION

If the scan tool MB991958 cannot communicate with
the TC-SST-ECU, this diagnosis result will be set.

.

TROUBLE JUDGEMENT CONDITIONS

If a communication flag is not set for the
TC-SST-ECU, the ETACS-ECU determines that
there is a failure.

.

TROUBLESHOOTING HINTS

• Malfunction of the connector [joint connector

(CAN4), transaxle assembly connector improp-
erly connected]

• Malfunction of the wiring harness [open circuit

between the transaxle assembly connector and
the joint connector (CAN4), power supply circuit
to the transaxle assembly]

• Malfunction of the TC-SST-ECU

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN4) A-14 and transaxle
assembly connector B-107 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

P.54C-7

.

Q: Are joint connector (CAN4) A-14 and transaxle

assembly connector B-107 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts.

AC708949AM

Connector: A-14

AC709137

Connector: B-107

AD

B-107 (B)