Mitsubishi Grandis. Manual - part 385

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-159

COMMENTS ON TROUBLE SYMPTOM

If the system does not communicate with the MUT-III, 
power supply to the diagnosis connector or CAN bus 
lines may be defective.

POSSIBLE CAUSES

• Damaged harness wires and connectors

DIAGNOSIS CONNECTOR

FRONT SIDE

ENGINE-ECU<M/T>
OR
ENGINE-A/T-ECU<A/T>

CENTER DISPLAY

CPU

COMBINATION
METER

NOTE

: LHD 
: RHD

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

Center Display CAN-BUS Line Circuit

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-160

DIAGNOSTIC PROCEDURE

Step 1. Check that the engine-ECU <M/T> or the 
engine-A/T-ECU <A/T> communicates with the 
MUT-III.

Check that the MUT-III communicates with the 
engine-ECU <M/T> or the engine-A/T-ECU when the 
MUT-III is operated..

Q: Is the check result satisfactory?

YES : 

Go to Step 2.

NO : 

Diagnose the MPI system (Refer to GROUP 
13A, Troubleshooting 

P.13A-20

).

Step 2. MUT-III CAN bus diagnostics

Use the MUT-III to diagnose the CAN bus lines.

Q: Is the check result satisfactory?

YES : 

Diagnose the power supply circuit. Refer to 

P.54A-161

.

NO : 

Repair the CAN bus lines (Refer to GROUP 
54D, Diagnosis 

− Can Bus Diagnostics 

Table 

P.54D-16

).

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-161

INSPECTION PROCEDURE 2: Check the centre display power supply circuit.

COMMENTS ON TROUBLE SYMPTOM

The earth circuit, the ignition switch (ACC) circuit or 
the ignition switch (IG1) circuit is suspected to be 
open or defective.

POSSIBLE CAUSES

• Malfunction of the centre display unit

• Damaged wiring harness and connectors

RELAY
BOX

RELAY
BOX

CENTER
DISPLAY

NOTE

: LHD 
: RHD

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

FUSIBLE
LINK

IGNITION
SWITCH (IG1)

IGNITION
SWITCH (ACC)

26

Centre Display Power Supply Circuit

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-162

DIAGNOSTIC PROCEDURE

Step 1. Check the following connector: C-06 
Centre display connector

Q: Is the check result normal?

YES : 

Go to Step 2. 

NO : 

Repair the defective connector.

Step 2. Measure the voltage at C-06 multi-centre 
display connector. 

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Ignition switch: LOCK (OFF) position

(3) Voltage between C-06 centre display connector 

terminal No.26 and body earth

OK: Battery voltage

Q: Is the check result normal?

YES : 

Go to Step 4. 

NO : 

Go to Step 3. 

AC310613

Harness side

BH

Connector: C-06 <LHD>

C-06 (B)

AC310631

Harness side

BC

Connector: C-06 <RHD>

C-06 (B)

AC310613

Harness side

BH

Connector: C-06 <LHD>

C-06 (B)

AC310631

Harness side

BC

Connector: C-06 <RHD>

C-06 (B)

AC310507DO

Connector C-06 
(Harness side)