Mitsubishi Colt Ralliart. Manual — part 478
COMBINATION METER
CHASSIS ELECTRICAL
54A-57
Inspection Procedure 10: Engine Coolant Temperature Gauge does not Work (Other Meters Work).
Engine Coolant Temperature Gauge Circuit
DIAGNOSIS
CONNECTOR
INPUT SIGNAL
FRONT SIDE
COMBINATION
METER
CPU
T/GA
SECONDARY SPEED SENSOR
ENGINE-ECU <M/T>
ENGINE-CVT-ECU <CVT>
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
Main
Index
Group
TOC
COMBINATION METER
CHASSIS ELECTRICAL
54A-58
COMMENTS ON TROUBLE SYMPTOM
If only the engine coolant temperature gauge does
not operate, the engine-ECU <M/T> or
engine-CVT-ECU <CVT> system, the combination
meter, the wiring harness or its connector may be
defective.
POSSIBLE CAUSES
• Damaged harness wires and connectors
• Malfunction of engine-ECU <M/T> or
engine-CVT-ECU <CVT>
• 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 satisfactory?
YES :
Go to Step 2.
NO :
Repair the CAN bus lines (Refer to GROUP
54D, Diagnosis - Can Bus Diagnostics Table
). After diagnosing the CAN bus
lines, go to Step 5.
STEP 2. M.U.T.-III other system diagnosis code
Check if an MPI system diagnosis code is set.
Q: Is the diagnosis code set?
YES :
Diagnose MPI system. (Refer to GROUP
, or
GROUP 13B <4G1>, Troubleshooting
.) After diagnosing the MPI
system, go to Step 5.
NO :
Go to Step 3.
STEP 3. M.U.T.-III data list
• Item No.8C: Water thermometer (Refer to
.)
• Item No.8E: Water thermometer definite flag
Q: Is the check result satisfactory?
YES :
Go to Step 4.
NO :
Diagnose MPI system. (Refer to GROUP
13A <4A9>, Troubleshooting
, or
GROUP 13B <4G1>, Troubleshooting
.) After diagnosing the MPI
system, go to Step 5.
STEP 4. M.U.T.-III actuator test
• Item No.88: Water temperature gauge: 0 °C
• Item No.89: Water temperature gauge: 85 °C
• Item No.8A: Water temperature gauge: 126 °C
OK: The water thermometer operates.
Q: Is the check result satisfactory?
YES :
Go to Step 5.
NO :
Replace combination meter and then go to
step 5.
STEP 5. Retest the system.
Check to see that the engine coolant temperature
gauge operates normally.
Q: Is the check result satisfactory?
YES :
The procedure is complete.
NO :
Go to Step 1.
Main
Index
Group
TOC
COMBINATION METER
CHASSIS ELECTRICAL
54A-59
DATA LIST REFERENCE TABLE
M1543007300916
The following items of the ECU input data can be
read using M.U.T.-III.
Item No.
Check items
Check conditions
Normal conditions
80
Speedometer
Perform a test run of the
vehicle.
Speedometer displayed value and
M.U.T.-III displayed value agree with
each other.
*
81
Speedometer (target
value)
Perform a test run of the
vehicle.
Speedometer displayed value and
M.U.T.-III displayed value agree with
each other.
*
82
Vehicle speed sensor
malfunction flag
Ignition switch : ON
Without
83
Vehicle speed sensor
definite flag
Ignition switch : ON
Set
84
Vehicle stopped flag
• Ignition switch : ON
• Vehicle speed 0 km/h
Set
87
Tachometer
Start the engine.
Tachometer displayed value and
M.U.T.-III displayed value agree with
each other.
89
Fuel gauge
−
Fuel gauge unit resistance value and
M.U.T.-III displayed value agree with
each other.
8A
Fuel gauge (target value) −
Fuel gauge and M.U.T.-III displayed
values agree with each other.
8C
Water thermometer
Ignition switch : ON
Water thermometer and M.U.T.-III
displayed values agree with each
other.
8E
Water thermometer
definite flag
Ignition switch : ON
Set
90
Odometer
−
Odometer displayed value and
M.U.T.-III displayed value agree with
each other.
A0
Door-ajar warning light
All doors are closed
OFF
Any door is open
ON
A1
SRS warning lamp
−
OFF
A2
ABS warning lamp
−
OFF
A3
Hydraulic pressure
warning lamp
−
OFF
A4
Charging warning lamp
−
OFF
A5
Engine warning lamp
−
OFF
A6
Fuel reserve warning
lamp
−
OFF
Main
Index
Group
TOC
COMBINATION METER
CHASSIS ELECTRICAL
54A-60
A7
Brake warning lamp
• Ignition switch : ON
• Parking brake : At
release
OFF
• Ignition switch : ON
• Parking brake :
OPERATION
ON
A8
Seat belt warning lamp
• Ignition switch : ON
• Driver's seatbelt :
fastened
OFF
• Ignition switch : ON
• Driver's seatbelt : Not
fastened
ON
A9
Electric power steering
warning lamp
−
OFF
B1
Turn-signal indicator
(RH)
Turn signal lamp : OFF
or only left side lamp
illuminates
OFF
Turn signal lamp : Right
side lamp illuminates
ON
B2
Turn-signal indicator
(LH)
Turn signal lamp : OFF
or only right side lamp
illuminates
OFF
Turn signal lamp : Left
side lamp illuminates
ON
B3
Front fog lamp indicator
Fog lamp : OFF
OFF
Fog lamp : ON
ON
B4
High-beam indicator
Headlamps : OFF or low
beam illuminates
OFF
Headlamps : High beam
illuminates
ON
C1
CVT indicator: P
Shift position : Other than
P position
OFF
Shift position : P position ON
C2
CVT indicator: R
Shift position : Other than
R position
OFF
Shift position : R position ON
C3
CVT indicator: N
Shift position : Other than
N position
OFF
Shift position : N position ON
C4
CVT indicator: D
Shift position : Other than
D position
OFF
Shift position : D position ON
C5
CVT indicator: Ds
Shift position : Other than
Ds position
OFF
Shift position : Ds
position
ON
Item No.
Check items
Check conditions
Normal conditions
Main
Index
Group
TOC
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