Mitsubishi Grandis. Manual — part 388

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-171

COMMENTS ON TROUBLE SYMPTOM

The CAN bus line wiring harness, connector(s), or
the engine-ECU <M/T> or engine-A/T-ECU <A/T>,
combination meter may be defective. But it is no
problem that "

−" is displayed when the average fuel

consumption display or the possible cruising
distance display is reset.

POSSIBLE CAUSES

• Malfunction of centre display unit

• Malfunction of combination meter

• Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

Step 1. MUT-III CAN bus diagnostics

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

Q: Is the check result satisfactory?

YES :

Go to Step 2.

NO :

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

− Can Bus Diagnostic Table

P.54D-16

). After diagnosing the CAN bus

lines, go to Step 4.

Step 2. MUT-III other system diagnosis code

Check if an combination meter diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Refer to

P.54A-35

and then go to Step 4.

NO :

Replace combination meter and then go to
Step 3.

Step 3. MUT-III other system diagnosis code

Check if an MPI system diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Refer to GROUP13A, Troubleshooting

P.13A-20

and then go to Step 4.

NO :

Replace combination meter and then go to
Step 4.

Step 4. Retest the system

Check if the driving information displays normally.

Q: Is the check result satisfactory?

YES :

The procedure is complete.

NO :

Go to Step 1.

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-172

Inspection Procedure 5: "

−" is displayed on the ambient temperature display.

COMMENTS ON TROUBLE SYMPTOM

The CAN bus line wiring harness, connector(s), or

the A/C-ECU may be defective.

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

CENTER
DISPLAY

A/C-ECU

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

Circuit of Time-out During CAN Communication with A/C-ECU

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-173

POSSIBLE CAUSES

• Malfunction of A/C-ECU

• Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

Step 1. MUT-III CAN bus diagnostics

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

Q: Is the check result satisfactory?

YES :

Go to Step 2.

NO :

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

− Can Bus Diagnostic Table

P.54D-16

). After diagnosing the CAN bus

lines, go to Step 3.

Step 2. MUT-III other system diagnosis code

Check if an A/C system diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Refer to GROUP 55, Troubleshooting

P.55-8

and then go to Step 3.

NO :

Replace A/C-ECU and then go to Step 3.

Step 3. Retest the system

Check if the ambient temperature displays normally.

Q: Is the check result satisfactory?

YES :

The procedure is complete.

NO :

Go to Step 1.

Inspection Procedure 6: The radio and CD player information cannot be displayed or the display is
not normal.

COMMENTS ON TROUBLE SYMPTOM

The radio and CD player operation screen will be
frozen if the centre display have received abnormal
data from the radio and CD player and via M-bus
communication.

POSSIBLE CAUSES

• Malfunction of radio and CD player

• Damaged wiring harness and connectors

AUDIO

CENTER
DISPLAY

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

M-BUS Line Circuit

CENTRE DISPLAY

CHASSIS ELECTRICAL

54A-174

DIAGNOSTIC PROCEDURE

Step 1. Connector check: Radio and CD player
connector C-22 and centre display unit
connector C-07.

Q: Is radio and CD player connector C-22 and centre

display unit connector C-07 in good condition?

YES :

Go to Step 2.

NO :

Repair the defective connector.

Step 2. Check the wiring harness between radio
and CD player connector C-22 (terminal26, 27
and 34) and centre display unit connector C-07
(terminal 7, 17 and 8).

Q: Is the wiring harness between radio and CD player

connector C-22 (terminal26, 27 and 34) and centre
display unit connector C-07 (terminal 7, 17 and 8)
in good condition?

YES :

Go to Step 3.

NO :

Repair the wiring harness.

AC310614

BR

Connectors: C-07, C-22 <LHD>

C-07

C-22

C-07 (B)

C-22

Harness side

Harness side

AC310632BL

Connectors: C-07, C-22 <RHD>

C-07

C-22

C-07 (B)

C-22

Harness side

Harness side

AC310614

BR

Connectors: C-07, C-22 <LHD>

C-07

C-22

C-07 (B)

C-22

Harness side

Harness side

AC310632BL

Connectors: C-07, C-22 <RHD>

C-07

C-22

C-07 (B)

C-22

Harness side

Harness side