Mitsubishi Lancer Evolution X. Manual - part 23

 

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Mitsubishi Lancer Evolution X. Manual - part 23

 

 

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-117

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

AWC-ECU

NOTE

: THE TERMINAL NUMBERS DESCRIBED 

IN THE CIRCUIT DIAGRAM AGREE WITH 
THE NUMBERS MARKED ON THE 
TRANSAXLE ASSEMBLY CONNECTOR AND 
HARNESS SIDE CONNECTOR.

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-118

.

FUNCTION

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

.

TROUBLE JUDGMENT 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)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-119

STEP 2. Check the wiring harness between joint connector 
(CAN4) A-14 and transaxle assembly connector B-107 for 
open circuit.

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN4) A-14 and transaxle 

assembly B-107, and check the wiring harness.

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

A-14 (terminal 6) and transaxle assembly connector B-107 
(terminal 5)

OK: Continuity exists (2 Ω or less)

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

A-14 (terminal 19) and transaxle assembly connector B-107 
(terminal 2)

OK: Continuity exists (2 Ω or less)

Q: Is the wiring harness between joint connector (CAN4) 

A-14 and transaxle assembly connector B-107 in good 
condition?
YES : 
Check the power supply circuit of the transaxle 

assembly. Refer to GROUP 22C, TC-SST − Diagnosis 

P.22C-15

.

NO :  Repair the wiring harness between joint connector 

(CAN4) A-14 and transaxle assembly connector 
B-107.

AC709746

AC709746

Harness side: A-14

AF

Harness side: B-107

TEST 
HARNESS

TEST 
HARNESS

AC709746

Harness side: A-14

AG

Harness side: B-107

TEST 
HARNESS

TEST 
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-120

DIAGNOSTIC ITEM 12: Diagnose the lines between the ETACS-ECU and joint connector (CAN2).

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

AWC-ECU

ENGINE CONTROL 
MODULE

 

 

 

 

 

 

 

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