Mitsubishi Lancer Evolution IX. Manual — part 592
TROUBLESHOOTING <ACD>
MANUAL TRANSMISSION (FF)
22A-51
STEP 5. Connectors check: C-26 4WD-ECU
connector, C-122, C-134, F-21 intermediate
connector, F-26 pressure sensor connector.
Check for the contact with terminals.
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
AC311002
4WD-ECU
Harness side
C-26 (Y)
AC
Connector: C-26
4WD-ECU
C-26 (Y)
Rear console
assembly
<LH drive vehicles>
<RH drive vehicles>
AC311015AC
Connector: C-122 <LH drive vehicles>
C-122
AC311016AE
Connector: C-122 <RH drive vehicles>
C-122 (L)
AC311015AG
Connector: C-134 <LH drive vehicles>
C-134 (B)
AC311016AD
Connector: C-134 <RH drive vehicles>
C-134 (GR)
AC311042
F-21 (B)
AB
Connector: F-21, F-26
F-26 (B)
Sensor side
F-21
F-26
TROUBLESHOOTING <ACD>
MANUAL TRANSMISSION (FF)
22A-52
STEP 6. Check the harness between 4WD-ECU
connector C-26 terminal No.43 and pressure
sensor connector F-26 terminal No.1.
Check the power supply line for short or open circuit.
Q: Is the check result normal?
YES :
Replace the pressure sensor.
NO :
Repair the wiring harness.
AC311002
4WD-ECU
Harness side
C-26 (Y)
AC
Connector: C-26
4WD-ECU
C-26 (Y)
Rear console
assembly
<LH drive vehicles>
<RH drive vehicles>
AC311042
AC
Connector: F-26
F-26 (B)
Sensor side
F-26
TROUBLESHOOTING <ACD>
MANUAL TRANSMISSION (FF)
22A-53
Code No.51 Longitudinal G-sensor system (open circuit or short circuit)
IGNITION
SWITCH (IG2)
ABS-ECU
4WD-ECU
G-SENSOR
(LONGITUDINAL)
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
G-sensor (longitudinal) system circuit <LH drive vehicles>
TROUBLESHOOTING <ACD>
MANUAL TRANSMISSION (FF)
22A-54
OPERATION
The 4WD-ECU receives the acceleration level in the
forward/reverse direction of the vehicle from the lon-
gitudinal G-sensor.
DIAGNOSIS CODE SET CONDITIONS
Code No.51 is set when the output signal of the lon-
gitudinal G-sensor is less than 0.5 V or above 4.5 V.
PROBABLE CAUSES
• Malfunction of the longitudinal G-sensor
• Damaged harness wires and connectors
• Malfunction of the ABS-ECU
• Malfunction of the 4WD-ECU
DIAGNOSIS
STEP 1. M.U.T.-II/III data list
Item 14: Longitudinal G-sensor voltage (Refer to data
list reference table
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
− How to Cope with Intermittent
).
NO :
Go to Step 2.
IGNITION
SWITCH (IG2)
ABS-ECU
4WD-ECU
G-SENSOR
(LONGITUDINAL)
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
G-sensor (longitudinal) system circuit <RH drive vehicles>
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