Mitsubishi Outlander GS45X. Manual — part 1322
DIAGNOSIS
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ELECTRONIC CONTROL AWD
27C-11
DIAGNOSTIC TROUBLE CODE CHART
M1274000800164
CAUTION
During diagnosis, a DTC associated with other system may be set when the ignition switch is turned
on with connector(s) disconnected. On completion, confirm all systems for DTC(s). If DTC(s) are set,
erase them all.
DTC
Item
Reference
page
C1078
Tire with incorrect diameter equipped
C1456
Wiring harness or coupling coil overcurrent failure
C145A
Wiring harness or coupling coil short circuit failure
C145D
Wiring harness or coupling open circuit failure
C145F
Coupling overload
C1460
Drive mode selector circuit failure
C2100
Abnormal battery voltage (too low)
C2101
Abnormal battery voltage (too high)
C211C
Abnormal IG1 power supply low voltage
C211D
Abnormal IG1 power supply high voltage
C211E
Abnormal power supply voltage (too low)
C211F
Abnormal power supply voltage (too high)
C2208
AWD-ECU internal error
U0001
Bus-off error
U0100
Engine CAN time-out
U0121
ABS CAN time-out
U0141
ETACS CAN time-out
U0401
Engine CAN data error
U0415
ABS CAN data error
U113C
Wheel speed sensor data error
U1415
Variant coding not implemented
DIAGNOSIS
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ELECTRONIC CONTROL AWD
27C-12
DIAGNOSTIC TROUBLE CODE PROCEDURES
DTC C1078: Tire with incorrect diameter equipped
CAUTION
If there is any problem in the CAN bus lines, an
incorrect DTC may be set. Prior to this diagnosis,
always diagnose the CAN bus lines.
.
OPERATION
If the vehicle is driven with a tire with incorrect diam-
eter (high-pressure type spare tire or flat tire)
installed to either wheel in the AWD mode,
AWD-ECU controls the coupling in high torque. If this
is the case, the coupling temperature may rise to
cause a seizure.
.
DTC SET CONDITIONS
If the following conditions are met simultaneously,
AWD-ECU gradually reduces the AWD control
torque to the specified torque, flashes the
AWD/LOCK indicators alternately, and sets the DTC
C1078.
• AWD selector switch: AWD/LOCK
• Difference in rotation speed between the front
and rear wheels exceeds continuously a specific
value.
.
TROUBLESHOOTING HINTS
Current trouble
• Tire with incorrect diameter (high-pressure type
spare tire or flat tire) equipped
• Improper adjusted tire pressure
Past trouble
• Tire with incorrect diameter (high-pressure type
spare tire or flat tire) has been installed.
• The tire pressure has been adjusted due to
improper tire pressure.
DIAGNOSIS
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle Communication Interface
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
STEP 1. Scan tool MB991958 CAN bus diagnostics
Use scan tool MB991958 to diagnose the CAN bus lines.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Repair the CAN bus line (Refer to GROUP 54C
−
Troubleshooting/CAN Bus Diagnostics Table
). On completion, go to Step 2.
STEP 2. Check whether the DTC is reset after repairing the
CAN bus line.
(1) Erase the DTC.
(2) Drive the vehicle straight with throttle opening angle of
approximately 50% or less, and constant vehicle speed of
30 km/h or higher for 20 seconds or longer.
(3) Check if the DTC is set.
Q: Is the DTC C1078 set?
YES : Go to Step 3.
NO : The procedure is complete.
DIAGNOSIS
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ELECTRONIC CONTROL AWD
27C-13
STEP 3. Tire check
Q: Are all installed wheels and tires same in size?
YES : Go to Step 4.
NO : Install the same size wheels and tires. Then go to
Step 4.
STEP 4. Tire pressure check
Check that the tire pressure of the installed tires agrees with
the tire pressure specified on the tire pressure label.
Q: Is the tire pressure normal?
YES : Go to Step 6.
NO : Adjust the tire pressure. Then go to Step 5.
STEP 5. Check whether the DTC is reset.
Drive the vehicle straight with throttle opening angle of approxi-
mately 50% or less, and constant vehicle speed of 30 km/h
(18.6 mph) or higher for 20 seconds or longer.
Q: Is the DTC C1078 set?
YES : Go to Step 6.
NO : This code is set because the tire pressure was
improper or a tire with incorrect diameter is installed.
STEP 6. Scan tool MB991958 data list
Check the following data list (Refer to
).
• Item 16: FL wheel speed sensor
• Item 17: FR wheel speed sensor
• Item 18: RL wheel speed sensor
• Item 19: RR wheel speed sensor
Q: Is the check result normal?
YES : Go to Step 7.
NO : Troubleshoot the ABS system (Refer to GROUP 35B
<Vehicles with
ABS>), the ASC system (Refer to GROUP 35C
−
Troubleshooting/DTC Chart
<Vehicles with
ASC>). Then go to Step 7.
STEP 7. Check whether the DTC is reset.
Drive the vehicle straight with throttle opening angle of approxi-
mately 50% or less, and constant vehicle speed of 30 km/h
(18.6 mph) or higher for 20 seconds or longer.
Q: Is the DTC C1078 set?
YES : Replace AWD-ECU (Refer to
). Then go to
Step 8 .
NO : The procedure is complete.
STEP 8. Check whether the DTC is reset.
Q: Is the DTC C1078 set?
YES : Diagnose again from Step 1.
NO : The procedure is complete.
DIAGNOSIS
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ELECTRONIC CONTROL AWD
27C-14
DTC C1456: Wiring harness or coupling coil overcurrent failure
ELECTRONIC
CONTROL
COUPLING
SOLENOID
ETACS-ECU
FUSIBLE
LINK
34
IGNITION
SWITCH (IG1)
IG1
RELAY
AWD-ECU
ACA02787
AC901227AB
C-128
C-31
C-138
Connectors: C-31, C-128, C-138
AC901229AB
Connectors: D-113, D119
D-113
D-119
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