Mitsubishi Outlander XL. Manual — part 1168

CAN Communication Circuit

ETACS-ECU

INTERFACE
CIRCUIT

INTERFACE
CIRCUIT

CAN DRIVE
CIRCUIT

HANDS FREE
MODULE

OCCUPANT
CLASSIFICATION-
ECU

SATELLITE
RADIO
TUNER

RADIO AND CD
PLAYER OR CD
CHANGER

NOTE

VEHICLES WITHOUT MITSUBISHI MULTI-COMMUNICATION SYSTEM (MMCS)
VEHICLES WITH MITSUBISHI MULTI-COMMUNICATION SYSTEM (MMCS)

CAN
TRANSCEIVER
CIRCUIT

CAN BOX UNIT

JOINT CONNECTOR
(CAN1)

CONTROLLER AREA NETWORK (CAN)

54D-155

DIAGNOSIS

ZC6008750013

Connectors: C-03, C-29, C-31, C-102, C-103

C-31

C-102

C-102

C-29

C-03

ZC6008760007

Connectors: C-13, C-16, C-17, C-28, C-109,

C-111, C-121

C-111

C-109 (B)

C-13

C-16 or
C-17

C-121

C-28 (Y)

ZC6008780000

Connector: C-301

ZC6008790000

Connector: D-34

FUNCTION
If a short to power supply or ground, open circuit or
line-to-line short is present at either CAN_H or CAN_L
side on the CAN-B lines, this diagnosis result will be
set.

TROUBLE JUDGEMENT CONDITIONS
When CAN-B lines communication is normal, and
diagnostic trouble code U0019 is set, the ETACS-
ECU determines that there is a failure.

TROUBLESHOOTING HINTS

｠

Malfunction of the connector (short to power supply
or ground in connector or improperly connected)

｠

Malfunction of the wiring harness (short to power
supply or ground, open circuit or line-to-line short in
CAN bus lines)

｠

Faulty ECU(s) (internal short to power supply or
ground)

DIAGNOSIS

Required Special Tools:

｠

MB991223: Harness Set

｠

MB992006: Extra Fine Probe

STEP 1. Check the wiring harness between ETACS-ECU
connector C-301 and body ground for a short to ground.
Measure the resistance at ETACS-ECU connector C-301.

Disconnect the negative battery terminal. For details refer
to P.54D-8.

A digital multimeter should be used. For details refer to P.
54D-8.

54D-156

CONTROLLER AREA NETWORK (CAN)

DIAGNOSIS

The test wiring harness should be used. For details refer
to P.54D-8.

(1)

Disconnect ETACS-ECU connector C-301, and measure the
voltage at the wiring harness side of ETACS-ECU connector.

ZC5010410037

Harness side: C-301

Test
harness

(2)

Measure the resistance between ETACS-ECU connector
terminal 6 and body ground.

OK: 1 kiloohm or more

ZC5010410038

Harness side: C-301

Test
harness

(3)

Measure the resistance between ETACS-ECU connector
terminal 7 and body ground.

OK: 1 kiloohm or more

Q:Do all the resistances measure 1 kiloohm or more?

YES:

Go to Step 2.

NO:

Go to Step 13.

STEP 2. Check the wiring harness between joint connector
(CAN1) C-103 and combination meter connector C-03 for a
short to ground. Measure the resistance at joint connector
(CAN1) C-103.

(1)

Disconnect joint connector (CAN1), and measure the
resistance at the wiring harness side of joint connector
(CAN1).

ZC5010410015

Harness side: C-103

Test
harness

(2)

Measure the resistance between joint connector (CAN1)
terminal 3 and body ground.

OK: 1 kiloohm or more

CONTROLLER AREA NETWORK (CAN)

54D-157

DIAGNOSIS

ZC5010410016

Harness side: C-103

Test
harness

(3)

Measure the resistance between joint connector (CAN1)
terminal 14 and body ground.

OK: 1 kiloohm or more

Q:Do all the resistances measure 1 kiloohm or more?

YES(vehicles with KOS):

Go to Step 3.

YES(vehicles with WCM):

Go to Step 4.

NO(vehicles with KOS or WCM):

Go to Step 48.

STEP 3. Check the wiring harness between joint connector
(CAN1) C-103 and KOS-ECU connector C-102 for a short to
ground. Measure the resistance at joint connector (CAN1)
C-103.

(1)

Disconnect joint connector (CAN1), and measure the
resistance at the wiring harness side of joint connector
(CAN1).

ZC5010410017

Harness side: C-103

Test harness

(2)

Measure the resistance between joint connector (CAN1)
terminal 8 and body ground.

OK: 1 kiloohm or more

ZC5010410018

Harness side: C-103

Test harness

(3)

Measure the resistance between joint connector (CAN1)
terminal 21 and body ground.

OK: 1 kiloohm or more

Q:Do all the resistances measure 1 kiloohm or more?

YES:

Go to Step 5.

NO:

Go to Step 49.

STEP 4. Check the wiring harness between joint connector
(CAN1) C-103 and WCM connector C-29 for a short to
ground. Measure the resistance at joint connector (CAN1)
C-103.

(1)

Disconnect joint connector (CAN1), and measure the
resistance at the wiring harness side of joint connector
(CAN1).

54D-158

CONTROLLER AREA NETWORK (CAN)

DIAGNOSIS