Mitsubishi Grandis. Manual — part 594

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-474

connector (CAN2) terminal No.11

OK: 2

Ω or less

(5) Continuity between C-125 intermediate

connector terminal No.27 and C-09 joint
connector (CAN2) terminal No.22

OK: 2

Ω or less

CAUTION

Strictly observe the specified wiring harness
repair procedure. For details refer to

P.54D-8

.

Q: Are the check results normal?

YES :

<All the voltages measure 2

Ω or less> Go

to Step 34 .

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between joint connector (CAN2) and the
intermediate connector.

STEP 34. Resistance measurement at C-09 joint
connector (CAN2) and C-126 diagnosis
connector.

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-8

.

CAUTION

The test wiring harness should be used. For
details refer to

P.54D-8

.

(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Ignition switch: OFF (LOCK)

CAUTION

When measuring the resistance, disconnect the
negative battery terminal. For details refer to

P.54D-8

.

(3) Ensure that the negative battery terminal is

AC312553

AC312553 AP

Harness side: C-09

Test
harness

Female side: C-125

Test harness

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC310613

AO

Connector: C-126 <LHD>

Harness side
(Front side)

C-126 (B)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-475

disconnected.

(4) Continuity between C-09 joint connector (CAN2)

terminal No.7 and C-126 diagnosis connector

terminal No.6

OK: 2

Ω or less

(5) Continuity between C-09 joint connector (CAN2)

terminal No.18 and C-126 diagnosis connector
terminal No.14

OK: 2

Ω or less

CAUTION

Strictly observe the specified wiring harness
repair procedure. For details refer to

P.54D-8

.

Q: Are the check results normal?

YES :

<All the resistances measure 2

Ω or less>

Diagnostics item 9: Diagnose shorts
between CAN_L and H lines. Refer to

P.54D-304

.

NO :

<Either or all of the resistances measure
more than 2

Ω> Repair the wiring harness

between joint connector (CAN1) and the
diagnosis connector.

AC312553

Harness side: C-09

Test
harness

AX

Front side : C-126

Test
harness

AC312553 AZ

Front side : C-126

Test
harness

Test
harness

Harness side: C-09

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-476

Diagnostic Item 18: Diagnose CAN bus lines thoroughly <LH drive vehicles with ASC>

CAUTION

When servicing a CAN bus line, earth yourself by
touching a metal object such as an unpainted
water pipe. If you fail to do, a component
connected to the CAN bus line may be broken.

A/C-ECU

CENTER DISPLAY

COMBINATION
METER

DIAGNOSIS
CONNECTOR

ASC-ECU

ENGINE-ECU<M/T>
ENGINE·A/T-ECU<A/T>

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-477

TROUBLE JUDGMENT

If the MUT-III can not received signals from ECUs,
CAN bus line connector(s) are broken or an open
circuit has occurred.

COMMENTS ON TROUBLE SYMPTOM

The CAN bus line wire or connectors may have
loose, corroded, or damage terminals, or terminals
pushed back in the connector.

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of the ETACS-ECU

• Malfunction of the combination meter

• Malfunction of the A/C-ECU

• Malfunction of the SRS-ECU

• Malfunction of the multi-centre display

• Malfunction of the steering wheel angle sensor

• Malfunction of the ASC-ECU

• Malfunction of the engine-ECU <M/T> or

engine-A/T-ECU <A/T>

DIAGNOSTIC PROCEDURE

STEP 1. Connector check: C-126 diagnosis
connector

CAUTION

The strand end of the twist wire should be within
10 cm from the connector. For details refer to

P.54D-8

.

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Repair the defective connector.

ETACS-ECU

STEERING WHEEL
ANGLE SENSOR

SRS-ECU

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

AC310613

AO

Connector: C-126 <LHD>

Harness side
(Front side)

C-126 (B)