Mitsubishi Colt Ralliart. Manual — part 524
MB991910
MB991826
MB991955
MB991911
MB991824
MB991827
MB991825
A
B
C
D
E
F
DO NOT USE
SPECIAL TOOL
HEATER, AIR CONDITIONER AND VENTILATION
55A-4
MB991955
A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991825
F: MB991826
M.U.T.-III sub-assembly
A: Vehicle
Communication
Interface (V. C. I.)
B: USB cable
C: M.U.T.-III main
harness A (applicable to
vehicles with CAN
communication)
D: M.U.T.-III main
harness B (applicable to
vehicles without CAN
communication)
E: Measurement adapter
F: Trigger harness
Check the A/C (The
M.U.T.-III diagnosis
codes display, service
data display and
actuator test)
CAUTION
For vehicles with CAN
communication, use
M.U.T.-III main harness
A to send simulated
vehicle speed. If you
connect M.U.T.-III main
harness B instead, the
CAN communication
does not function
correctly.
Tool
Number
Name
Use
Main
Index
Group
TOC
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-5
TROUBLESHOOTING
DIAGNOSIS TROUBLESHOOTING FLOW
M1554004700232
Refer to GROUP 00, How to Use Troubleshoot-
ing/Inspection Service Points
.
DIAGNOSIS FUNCTION
M1554004800251
HOW TO READ DIAGNOSIS CODE
Connect the M.U.T.-III to the 16-pin diagnosis con-
nector to read diagnosis code (Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points
HOW TO ERASE DIAGNOSIS CODE
Refer to GROUP 00, How to Use Troubleshoot-
ing/Inspection Service Points
.
DIAGNOSIS CODE CHART
M1554004900377
Code No.
Diagnostic item
Reference
page
Service data
display
contents when
diagnosis
code is set
B1011
Ambient temperature sensor system (short circuit)
20
°C
B1012
Ambient temperature sensor system (open circuit)
B1021
Air thermo sensor system (short circuit)
−6°C
B1022
Air thermo sensor system (open circuit)
B1082
Automatic/manual types abnormal error
−
U1073
Bus off error
Refer to
GROUP 54A,
COMBINATION
METER
−
U1100
Engine-CVT-ECU time-out
U1101
U1102
ABS-ECU time-out
U1106
EPS-ECU time-out
U1109
ETACS-ECU time-out
U1120
Failure information on engine-CVT-ECU (related to
engine)
U1206
Flag invalid
Main
Index
Group
TOC
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-6
DIAGNOSTIC TROUBLE CODE
PROCEDURES
Code No. B1011,B1012: Ambient temperature sensor system
AMBIENT
TEMPERATURE
SENSOR
COMBINATION
METER
SENSOR CIRCUIT
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
METER AND A/C-ECU
Ambient Temperature Sensor Circuit
DIAGNOSIS CODE SET CONDITION
This code is set when the ambient temperature sen-
sor circuit is open (Code No.B1012) or is short (Code
No.B1011).
POSSIBLE CAUSES
• Malfunction of the ambient temperature sensor
• Damaged the wiring harness and connectors
• Malfunction of the combination meter (meter and
A/C-ECU)
DIAGNOSIS PROCEDURE
Step 1. M.U.T.-III data list
Check that the following service data display con-
tents are normal. (Refer to
.)
• Item 02: Ambient temperature sensor
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Go to Step 2.
Main
Index
Group
TOC
TROUBLESHOOTING
HEATER, AIR CONDITIONER AND VENTILATION
55A-7
Step 2. Connector check: A-19 ambient
temperature sensor connector and B-15
combination meter connector
AC313811
Connector: A-19
A-19 (B)
AB
Harness side
AC401055
AE
Connector: B-15
B-15 (B)
Harness side
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the connector.
Step 3. Check the wiring harness between A-19
ambient temperature sensor connector
(terminals 1 and 2) and B-15 A/C-ECU connector
(terminals 15 and 10).
AC313811
Connector: A-19
A-19 (B)
AB
Harness side
AC401055
AE
Connector: B-15
B-15 (B)
Harness side
NOTE:
AC401053
AD
Connector: B-41
Prior to the wiring harness inspection, check interme-
diate connector B-41, and repair if necessary.
• Check the sensor signal line and earth line for
open or short circuit.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the wiring harness.
Step 4. Check the ambient temperature sensor.
Refer to
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the ambient temperature sensor.
Step 5. Check whether the diagnosis code is
reset.
Q: Is the diagnosis code set?
YES :
Replace the combination meter (meter and
A/C-ECU).
NO :
The trouble can be an intermittent
malfunction (Refer to GROUP 00, How to
Cope with Intermittent Malfunction
Main
Index
Group
TOC
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