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

IGNITION
SWITCH (IG1)

IG1
RELAY

LED DRIVE
CIRCUIT

COMBINATION
METER

ETACS-
ECU

CPU

LCD
ODO/TRIP
T/GA F/GA

FUSIBLE
LINK

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

Connector: C-01 <LHD>

ACA00895AS

Connector: C-01 <RHD>

ACA00886

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

C-317

C-309 (B)

C-307 (B)

ACA00887

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

Content .. 95 96 97 98 ..