Mitsubishi Lancer Evolution X. Manual - part 27

 

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Mitsubishi Lancer Evolution X. Manual - part 27

 

 

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-133

.

FUNCTION

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

.

TROUBLE JUDGMENT CONDITIONS

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

.

TROUBLESHOOTING HINTS

• Malfunction of the connector [joint connector 

(CAN1), KOS-ECU connector improperly con-
nected]

• Malfunction of the wiring harness [open circuit 

between the KOS-ECU connector and the joint 
connector (CAN1), power supply circuit to the 
KOS-ECU]

• Malfunction of the KOS-ECU

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set
• MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN1) C-105 and 
KOS-ECU connector C-05 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 (CAN1) C-105 and KOS-ECU 

connector C-05 in good condition?
YES : 
Go to Step 2.
NO :  Repair the damaged parts.

AC708950BZ

C-05

C-105

Connectors: C-05, C-105

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-134

STEP 2. Check the wiring harness between joint connector 
(CAN1) C-105 and KOS-ECU connector C-05 for open 
circuit.

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN1) C-105 and KOS-ECU 

connector C-05, and check the wiring harness.

(2) Check the wiring harness between joint connector (CAN1) 

C-105 (terminal 9) and KOS-ECU connector C-05 (terminal 
1)

OK: Continuity exists (2 Ω or less)

(3) Check the wiring harness between joint connector (CAN1) 

C-105 (terminal 22) and KOS-ECU connector C-05 
(terminal 2)

OK: Continuity exists (2 Ω or less)

Q: Is the wiring harness between joint connector (CAN1) 

C-105 and KOS-ECU connector C-05 in good condition?
YES : 
Check the power supply circuit of the KOS-ECU. 

Refer to GROUP 42B, KOS-ECU − Diagnosis 

P.42B-152

.

NO :  Repair the wiring harness between joint connector 

(CAN1) C-105 and KOS-ECU connector C-05.

AC709707

AC709707 BV

TEST HARNESS

Harness side: C-105

TEST HARNESS

Harness side: C-05

AC709707 BW

Harness side: C-105

TEST HARNESS

Harness side: C-05

TEST 
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-135

DIAGNOSTIC ITEM 16: Diagnose when the scan tool cannot receive the data sent by WCM.

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-B Communication Circuit

ETACS-ECU

INTERFACE 
CIRCUIT

CAN DRIVE 
CIRCUIT

A/C-ECU

COMBINATION 
METER

SRS-ECU

WIRELESS 
CONTROL 
MODULE

KOS-ECU

NOTE

VEHICLES WITH WCM
VEHICLES WITH KOS

CAN DRIVE 
CIRCUIT

CAN DRIVE 
CIRCUIT

CAN DRIVE 
CIRCUIT

JOINT CONNECTOR 
(CAN1)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-136

.

FUNCTION

If the scan tool MB991958 cannot communicate with 
the WCM, this diagnosis result will be set.

.

TROUBLE JUDGMENT CONDITIONS

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

.

TROUBLESHOOTING HINTS

• Malfunction of the connector [joint connector 

(CAN1), WCM connector improperly connected]

• Malfunction of the wiring harness [open circuit 

between the WCM connector and the joint con-
nector (CAN1), power supply circuit to the WCM]

• Malfunction of the WCM

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set
• MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN1) C-105 and WCM 
connector C-07 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 (CAN1) C-105 and WCM connector 

C-07 in good condition?
YES : 
Go to Step 2.
NO :  Repair the damaged parts.

AC708951CD

Connector: C-07

C-07

AC708950

Connector: C-105

BL

 

 

 

 

 

 

 

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