Mitsubishi Lancer (4A9 engine). Manual — part 97

COMBINATION METER

CHASSIS ELECTRICAL

54A-50

SYMPTOM PROCEDURES

Inspection Procedure 1: Power supply circuit check

Inspection Procedure 2: The odometer and the trip meter are not displayed.

Inspection Procedure 3: No needle meters work.

Inspection Procedure 4: If the ignition switch is turned to the ON position, the indicator and warning
lamps do not illuminate normally.

COMBINATION METER

CHASSIS ELECTRICAL

54A-51

Combination Meter Power Source Circuit

FUSIBLE
LINK

36

38

IGNITION
SWITCH (IG1)

IG1
RELAY

LED DRIVE
CIRCUIT

COMBINATION
METER

ETACS-
ECU

CPU

LCD
ODO/TRIP
T/GA F/GA

FUSIBLE
LINK

34

44

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

RELAY BOX

ENGINE
COMPARTMENT

NOTE

: EXCEPT 1800-DIESEL
: 1800-DIESEL
: LHD
: RHD

COMBINATION METER

CHASSIS ELECTRICAL

54A-52

COMMENTS ON TROUBLE SYMPTOM
If the odometer and trip meter is not displayed or no
needle meters work, power supply to the combina-
tion meter, or the combination meter itself may have
a problem.

PROBABLE CAUSES

• Damaged harness wires and connectors

• Malfunction of combination meter

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check if diagnosis code is set to the combination
meter.

Q: Is the diagnosis code set?

YES :

Troubleshoot the combination meter. Refer

to .

NO :

Go to Step 2.

STEP 2. Connector check: C-01 combination
meter connector

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Repair the defective connector.

STEP 3. Voltage measurement at the C-01
combination meter connector
(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Turn the ignition switch to the LOCK (OFF)

position.

(3) Measure the voltage between the C-01

combination meter connector terminal No. 1 and
the body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Go to Step 4.

STEP 4. Check the wiring harness between the
fusible link No. (36) <Except 1800-Diesel> or (38)
<1800-Diesel> and the C-01 combination meter
connector terminal No. 1.
Check the power supply line for open circuit.
NOTE: Before the wiring harness check, check the
ETACS-ECU connectors C-307 and C-317, and
repair them if necessary.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction ).

NO :

Repair the wiring harness.

STEP 5. Voltage measurement at the C-01
combination meter connector
(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between the C-01

ACA00891

AD

Connector: C-01 <LHD>

ACA00895AS

Connector: C-01 <RHD>

ACA00886

BD

Connectors: C-307, C-309, C-317 <LHD>
ETACS-ECU

C-317

C-309 (B)

C-307 (B)

ACA00887

BE

Connectors: C-307, C-309, C-317 <RHD>
ETACS-ECU

C-317

C-309 (B)

C-307 (B)

COMBINATION METER

CHASSIS ELECTRICAL

54A-53

combination meter connector terminal No. 2 and
the body earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Go to Step 6.

STEP 6. M.U.T.-III other system service data
Check the input signal from the ignition switch (IG1)
in the ETACS-ECU.

• Turn the ignition switch to the ON position.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Troubleshoot the ETACS-ECU. Refer to
Inspection Procedure 2 "The ignition switch
(IG1) signal is not received." .

STEP 7. Check the wiring harness between the
fusible link No. (34) <Except 1800-Diesel> or (44)
<1800-Diesel> and the C-01 combination meter
connector terminal No. 2.
Check the power supply line for open circuit.
NOTE: Before the wiring harness check, check the
ETACS-ECU connectors C-309, C-317 and joint con-
nector C-150, and repair them if necessary.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/Inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

Repair the wiring harness.

STEP 8. Resistance measurement at the C-01
combination meter connector
(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Measure the resistance between the C-01

combination meter connector terminal No. 13 and
the body earth.

OK: Continuity exists (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 10.

NO :

Go to Step 9.

STEP 9. Wiring harness check between the C-01
combination meter connector terminal No. 13
and the body earth
Check the earth wires for open circuit.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/Inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

Repair the wiring harness.

STEP 10. Retest the system

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/Inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

Replace the combination meter.

Inspection Procedure 5: The speedometer does not work (the other meters work).

COMMENTS ON TROUBLE SYMPTOM
If only the speedometer does not operate, the ABS
<vehicles with ABS> or ASC <vehicles with ASC>
system and combination meter may have a problem.

PROBABLE CAUSES

• Malfunction of ABS-ECU <vehicles with ABS>

• Malfunction of ASC-ECU <vehicles with ASC>

• Malfunction of combination meter

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the CAN bus line (Refer to GROUP
54C

− Troubleshooting ). Complete the CAN

troubleshooting, and then go to Step 6.

Item No.

Item name

Normal
condition

Item 254

IG voltage

System voltage