Mitsubishi Lancer (4A9 engine). Manual — part 99
COMBINATION METER
CHASSIS ELECTRICAL
54A-58
Inspection Procedure 9: The multi information display screen cannot be changed with the operation
of the meter information switch.
CAUTION
Before replacing the combination meter, be sure
to check that the power supply circuit, earth cir-
cuit, and communication circuit are normal.
COMMENTS ON TROUBLE SYMPTOM
When the signal from the meter information switch is
received, the combination meter switches the multi
information display screen. If the multi information
display screen does not switch normally, the meter
information switch, wiring harness, connector(s), or
combination meter may have a problem.
PROBABLE CAUSES
• Malfunction of meter information switch
• Malfunction of combination meter
• Damaged harness wires and connectors
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 :
Refer to .
NO :
Go to Step 2.
Meter Information Switch Circuit
INTERFACE
CIRCUIT
COMBINATION
METER
CPU
METER
INFORMATION
SWITCH
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
AC701093 BB
Connectors: C-01, C-37 <LHD>
C-01
C-37
AC701122 BQ
Connectors: C-01, C-37 <RHD>
C-01
C-37
COMBINATION METER
CHASSIS ELECTRICAL
54A-59
STEP 2. Connector check: C-37 meter
information switch connector
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the connector.
STEP 3. Meter information switch check
Check the meter information switch. Refer to .
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the meter information switch.
STEP 4. Resistance measurement at the C-37
meter information switch connector
(1) Disconnect the meter information switch
connector, and then measure at the wiring
harness side.
(2) Measure the resistance from C-37 meter
information switch connector terminal No. 4 to
body earth.
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Go to Step 5.
STEP 5. Check the wiring harness between the C-
37 meter information switch connector terminal
No. 4 and the body earth.
Check the earth wires for open circuit.
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the wiring harness.
STEP 6. Connector check: C-01 combination
meter connector
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the connector.
STEP 7. Check the wiring harness between the C-
01 combination meter connector terminal No. 3
and the C-37 meter information switch terminal
No. 1.
Check the output lines for open circuit and short cir-
cuit.
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the wiring harness.
STEP 8. Retest the system
Check that the multi information display screen
switches normally when the meter information switch
is operated.
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 10: Fuel Gauge does not work (other meters work).
COMMENTS ON TROUBLE SYMPTOM
If only the fuel gauge does not operate, the fuel
pump and gauge assembly, the fuel gauge unit (sub)
or the combination meter may be defective.
PROBABLE CAUSES
• Malfunction of fuel pump and gauge assembly
• Malfunction of the fuel gauge unit (sub)
• Malfunction of combination meter
DIAGNOSIS PROCEDURE
STEP 1. Check the diagnosis code.
Check if diagnosis code No. B1201 is set.
Q: Is the diagnosis code No. B1201 set?
YES :
Perform the troubleshooting of when the
diagnosis code is set (Refer to ).
NO :
Go to Step 2.
STEP 2. fuel pump and gauge assembly and fuel
gauge unit check
Check the fuel pump and gauge assembly and fuel
gauge unit. Refer to .
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Replace the fuel pump and gauge assembly
and fuel gauge unit.
COMBINATION METER
CHASSIS ELECTRICAL
54A-60
STEP 3. Retest the system.
Check that the fuel gauge works normally.
Q: Is the check result normal?
YES :
The procedure is complete.
NO :
Replace the combination meter.
Inspection Procedure 11: Seat belt reminder function does not work normally.
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
COMMENTS ON TROUBLE SYMPTOM
If the seat belt reminder function does not work nor-
mally, the seat belt switch input circuit, the combina-
tion meter or centre panel unit may be defective.
PROBABLE CAUSES
• Malfunction of the seat belt switch (driver’s side)
• Malfunction of the seat belt switch (passenger’s
side)
• Malfunction of the combination meter
• Malfunction of the centre panel unit
• Damaged harness wires and connectors
ACA00891
AD
Connector: C-01 <LHD>
ACA00895AS
Connector: C-01 <RHD>
ACA00892
Connector: C-10 <LHD>
AC
C-10
ACA00895AD
Connector: C-10 <RHD>
ACB02656
Connectors: D-29, D-33 <LHD>
AB
D-29
D-33
ACB02658
Connectors: D-29, D-33 <RHD>
AB
D-33
D-29
COMBINATION METER
CHASSIS ELECTRICAL
54A-61
DIAGNOSIS PROCEDURE
STEP 1. Connector check: D-29 seat belt switch
(driver’s side) connector, D-33 seat belt switch
(passenger’s side) connector
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Repair the defective connector.
STEP 2. Check the seat belt switch.
Refer to GROUP 52A
− Front Seat Belt .
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Replace the seat belt switch.
STEP 3. Resistance measurement at the D-29
seat belt switch (driver’s side) connector, D-33
seat belt switch (passenger’s side) connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Measure the resistance between the seat belt
switch connector terminal No. 2 and the body
earth.
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 4.
STEP 4. Wiring harness check from D-29 seat
belt switch (driver’s side) connector, D-33 seat
belt switch (passenger’s side) connector terminal
No. 2 to body earth.
NOTE: Prior to the wiring harness inspection, check
joint connector D-47, and repair if necessary.
• 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 5. Connector check: C-01 combination
meter connector
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
STEP 6. Check the wiring harness from C-01
combination meter connector terminal No.5
<driver’s side> or 16 <passenger’s side> to D-29
seat belt switch (driver’s side) connector, D-33
seat belt switch (passenger’s side) connector
terminal No. 1.
NOTE: Prior to the wiring harness inspection, check
intermediate connector C-27, and repair if necessary.
• Check the input line for open and short circuit.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the wiring harness.
STEP 7. Connector check: C-10 centre panel unit
connector
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the defective connector.
STEP 8. Check the wiring harness from C-10
centre panel unit connector terminal No.3 to C-01
combination meter connector terminal No.19.
• Check the input line for open and short circuit.
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Repair the wiring harness.
STEP 9. Retest the system.
The seat belt reminder function should work nor-
mally.
Q: Is the check result normal?
YES <The seat belt reminder function works
normally.> :
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 <Buzzers do not sound.> :
Replace the
combination meter.
NO <The indicator (driver’s side) does not
illuminate.> :
Replace the combination meter.
NO <The indicator (passenger’s side) does not
illuminate.> :
Replace the centre panel unit.
SERVICE DATA
M1540201000871
NOTE: Some items are not displayed on M.U.T.-III
according to the information in the ECU.
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