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)