Mitsubishi Montero (2002-2004). Manual — part 1105
M-ASTC DIAGNOSIS
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MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-37
STEP 11. Replace the steering wheel sensor.
Replace the steering wheel sensor, and check that the DTC
sets.
Q: Does the M-ASTC-ECU set any DTC?
YES : Replace the M-ASTC-ECU, and then go to Step 12.
NO : The procedure is complete.
STEP 12. Recheck for diagnostic trouble code.
Q: Does DTC 66, 68 or 83 reset?
YES : Return to Step 1.
NO : The procedure is complete.
M-ASTC DIAGNOSIS
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MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-38
DTC 67: Communication error in steering wheel sensor
CAUTION
If the diagnostic trouble code(s), which indicate a
communication error in the steering wheel sen-
sor, has been set, diagnose the CAN main bus
line.
AC205072
Steering Wheel Sensor Communication Circuit
AB
M-ASTC DIAGNOSIS
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MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-39
.
CIRCUIT OPERATION
The M-ASTC-ECU gathers information regarding the
steering operation, through the CAN bus line from
the steering wheel sensor.
.
M-ASTC DTC SET CONDITION
DTC 67 is set if the M-ASTC-ECU cannot gather
information from the steering wheel sensor at all.
.
TROUBLESHOOTING HINTS
The most likely causes for DTC 67 to set are:
• The CAN bus line is defective.
• Damaged connector(s)
• The steering wheel sensor is defective.
• The M-ASTC-ECU is defective.
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991502: Scan Tool (MUT-II)
STEP 1. Diagnose CAN main bus line.
CAUTION
If DTC 67 is set, diagnose the CAN main bus line.
Diagnose the CAN main bus line. Refer to
Q: Have you completed checking or repairing the CAN
main bus line?
YES :
• If the CAN main bus line is repaired, go to Step 11
.
• If the CAN main bus line is not defective, go to
Step 2.
NO : Diagnose the CAN main bus line. Refer to
.
AC204170
CONNECTORS: D-02, D-28
BI
D-28
D-02
AC204172
CONNECTOR: D-225
AH
AC204173
CONNECTORS: D-208, D-210
D-208
D-210
AR
M-ASTC DIAGNOSIS
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MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-40
STEP 2. Using scan tool MB991502, check data list item 25.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector
(16-pin).
(2) Turn the ignition switch to the "ON" position.
(3) When the steering wheel is turned, data list item 25 should
change.
Q: When the steering wheel is turned, does data list item
25 change?
YES : Go to Step 10.
NO : Go to Step 3.
STEP 3. Check steering wheel sensor connector D-225.
Q: Is steering wheel sensor connector D-225 in good
condition?
YES : Go to Step 11.
NO : Repair or replace the connector, and then go to Step
AC204172
CONNECTOR: D-225
HARNESS SIDE
AD
3 2
1
4
5
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