Mitsubishi Outlander GS45X. Manual — part 1288

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-97

DIAGNOSTIC ITEM 12: 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 Communication Circuit

ETACS-ECU

INTERFACE
CIRCUIT

CAN DRIVE
CIRCUIT

STEERING WHEEL
SENSOR

AWD-ECU

AWC-ECU

JOINT CONNECTOR
(CAN2)

JOINT CONNECTOR
(CAN3)

TRANSAXLE
CONTROL MODULE

ASC-ECU

ABS-ECU

ENGINE CONTROL
MODULE

:VEHICLES WITHOUT ASC

NOTE

:VEHICLES WITH ASC

:6A/T

:CVT

:ELECTRONIC CONTROLLED AWD
:S-AWC

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-98

.

FUNCTION

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

.

TROUBLE JUDGMENT 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) or ECM connector improperly connected]

• Malfunction of the wiring harness [open circuit

between the ECM and the joint connector
(CAN3), power supply circuit to the ECM]

• Malfunction of the ECM

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN3) C-01 and ECM
connector B-11 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 (CAN3) C-01 and ECM connector

B-11 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts.

AC901598

Connector: B-11

AB

B-11 (GR)

AC901075 AS

Connector: C-01

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-99

STEP 2. Check the wiring harness between joint connector
(CAN3) C-01 and ECM connector B-11 for open circuit.

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN3) C-01 and ECM

connector B-11, and check the wiring harness.

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

C-01 (terminal No.4) and ECM connector B-11 (terminal
No.90)

OK: Continuity exists (2 ohms or less)

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

C-01 (terminal No.15) and ECM connector B-11 (terminal
No.91)

OK: Continuity exists (2 ohms or less)

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

C-01 and ECM connector B-11 in good condition?
YES : Check the power supply circuit of the ECM. Refer to

GROUP 13A, Troubleshooting

P.13A-54

<2.4L

Engine> or GROUP 13B, Troubleshooting

P.13B-55

<3.0L Engine>.

NO : Repair the wiring harness between joint connector

(CAN3) C-01 and ECM connector B-11.

AC709746

Harness side: C-01

AP

Harness side: B-11

TEST
HARNESS

TEST
HARNESS

AC709746

Harness side: C-01

AQ

Harness side: B-11

TEST
HARNESS

TEST
HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-100

DIAGNOSTIC ITEM 13: 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 Communication Circuit

ETACS-ECU

INTERFACE
CIRCUIT

CAN DRIVE
CIRCUIT

STEERING WHEEL
SENSOR

AWD-ECU

AWC-ECU

JOINT CONNECTOR
(CAN2)

JOINT CONNECTOR
(CAN3)

TRANSAXLE
CONTROL MODULE

ASC-ECU

ABS-ECU

ENGINE CONTROL
MODULE

:VEHICLES WITHOUT ASC

NOTE

:VEHICLES WITH ASC

:6A/T

:CVT

:ELECTRONIC CONTROLLED AWD
:S-AWC