2007 MITSUBISHI LANCER EVOLUTION sensor

ABS <4WD> -Troubleshooting35B-8
Diagnosis code No.Reference page Inspection item
81Steering wheel sensor (ST-1) system (Open circuit or short circuit)35B-14
82Steering wheel sensor (ST-2) system (Open circuit or short circuit)
83Steering wheel sensor (ST-N) system (Open circuit or short circuit)
NOTE: diagnosis code No.16, 52, 63
1. Code No. 16 is cleared from the memory by turning the ignition switch to ACC position. When the system
is properly reset, this code is also cleared from the memory.
2. Code No. 52 and 63 are cleared from the memory by turning the ignition switch to ACC position.

ABS <4WD> -Troubleshooting35B-9
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Code Nos.11, 12, 13 and 14 Wheel speed sensor
(open circuit or short circuit)Probable cause
Code Nos.21, 22, 23 and 24 Wheel speed sensor
Code Nos. 11, 12, 13 and 14 are output if the ABS-ECU detects an open circuit
or short-circuit in the (+) wire or ( - ) wire in any one of the four wheel speed sensors.DMalfunction of wheel speed sensor
DMalfunction of wiring harness or connector
DMalfunction of hydraulic unit and ABS-ECU
Code Nos. 21, 22, 23 and 24 are output in the following cases.
DWhen there is no input from any one of the four wheel speed sensors when travelling
at several km/h or more, even though open circuit can not be verified.
DWhen a chipped or blocked-up ABS rotor is detected and if the anti-lock system
operates continuously because a malfunctioning sensor or a warped ABS rotor
is causing sensor output to drop.DMalfunction of wheel speed sensor
DMalfunction of wiring harness or connector
DMalfunction of ABS rotor
DToo much gap between the sensor and the ABS rotor
DMalfunction of hydraulic unit and ABS-ECU
DMalfunction of wheel bearing
NG
NG
Replace
OK
Check the harness wire, and repair if necessary.
DBetween each wheel speed sensor and ABS-ECU
NG
Repair
OK
Wheel bearing check
(Refer to GROUP 26 and
GROUP 27 - On-vehicle
Service.)
NG
Repair
NG
Replace the hydraulic unit and ABS-ECU.
OK
Check the trouble
symptom.
Check the following connector:B-123
OK
ABS rotor check
(Refer to P.35B-34.)NG
Replace
NG
Wheel speed sensor
check
(Refer to P.35B-34.)NG
Replace
OK
Wheel speed sensor output voltage check (Refer to P.35B-26.)OK
Check the trouble
symptom.
OK
Check the following connectors:
A-03, A-37, A-43 , C-111, C-128, C-136 drive vehicles>, C-146, D-04, D-10, D-30
OK
Measure at the ABS-ECU connector B-123.
DDisconnect the connector, and measure at the harness side
connector.
DResistances between 6 and 7, 8 and 9, 22 and 31, 29 and
30
OK:1.24 - 1.64 kΩNGWheel speed sensor check (Refer to P.35B-34.)
Wheel speed sensor installation checkNG
Repair

ABS <4WD> -Troubleshooting35B-11
Code No.32 Longitudinal G sensor systemProbable cause
This code is output in the following cases.
DIf the longitudinal G sensor output voltage is less than 0.5 V or more than 4.5 V

DIf the longitudinal G sensor output voltage does not change
DMalfunction of longitudinal G sensor
DMalfunction of wiring harness or connector
DMalfunction of hydraulic unit and ABS-ECU
(1) NG
NG
Repair
NG
Check the harness wire, and repair if necessary.
DBetween ignition switch and longitudinal G sensor
OK
Check the trouble
symptom.
Check the following connectors:D-32, C-210, C-213
NG
Repair
NG
OK
Check the trouble
symptom. OK
(2) NG
Measure at the longitudinal G sensor connector D-32.
DDisconnect the connector, and measure at the harness side
connector.
(1) Voltage between 1 and body earth (Ignition switch: ON)
OK:System voltage
(2) Continuity between 3 and body earth
OK:Continuity
Repair
Check the following connectors:B-123, C-128 vehicles>, C-130 , D-32
NGOK
Repair
Check the harness wire.
DBetween longitudinal G sensor and ABS-ECU
Replace the hydraulic unit and ABS-ECU.
MB991348

mark downward>
D-32 Harness
side connector
NG
OK
NG
Repair
NG
OK
Check the trouble
symptom.
Check the following connectors:B-123, C-128, D-32
DRemove the longitudinal G sensor. (Refer to P.35B-35.)
DConnect the special tool between the harness side connector
D-32 and the longitudinal G sensor.
DIgnition switch: ON
DVoltage between 2 and body earth
OK:2.4 - 2.6 V (horizontal position)
3.3 - 3.7 V (with front mark downward)
NGOK
Repair
Check the harness wire.
DBetween longitudinal G sensor and ABS-ECU
Replace the hydraulic unit and ABS-ECU.
Replace the longitudinal G sensor.

ABS <4WD> -Troubleshooting35B-13
Code No.71 Lateral G sensor systemProbable cause
This code is output in the following cases.
DIf lateral G sensor output voltage is less than 0.5 V or more than 4.5 V

DIf the lateral G sensor output voltage do not change
DMalfunction of lateral G sensor
DMalfunction of wiring harness or connector
DMalfunction of hydraulic unit and ABS-ECU
(1) NG
NG
Repair
NG
Check the harness wire, and repair if necessary.
DBetween ignition switch and lateral G sensor
OK
Check the trouble
symptom.
Check the following connectors:D-33, C-210, C-213
NG
Repair
NG
OK
Check the trouble
symptom. OK
(2) NG
Measure at the lateral G sensor connector D-33.
DDisconnect the connector, and measure at the harness side
connector.
(1) Voltage between 1 and body earth (Ignition switch: ON)
OK:System voltage
(2) Continuity between 3 and body earth
OK:Continuity
Repair
Check the following connectors:B-123, C-128, D-33
NGOK
Repair
Check the harness wire.
DBetween lateral G sensor and ABS-ECU
Replace the hydraulic unit and ABS-ECU.
MB991348

mark downward>
D-33 Harness
side connector
NG
OK
NG
Repair
NG
OK
Check the trouble
symptom.
Check the following connectors:B-123, C-128, D-33
DRemove the lateral G sensor. (Refer to P.35B-35.)
DConnect the special tool between the harness side connector
D-33 and the lateral G sensor.
DIgnition switch: ON
DVoltage between 2 and body earth
OK:2.4 - 2.6 V (horizontal position)
OK:3.3 - 3.7 V (with front mark downward)
NGOK
Repair
Check the harness wire.
DBetween lateral G sensor and ABS-ECU
Replace the hydraulic unit and ABS-ECU.
Replace the lateral G sensor.

ABS <4WD> -Troubleshooting35B-14
Code No.81 Steering wheel sensor (ST-1) system (open
circuit or short circuit)Probable cause
Code No.82 Steering wheel sensor (ST-2) system (open
circuit or short circuit)
Code No.83 Steering wheel sensor (ST-N) system (open
circuit or short circuit)
These codes are output if there is a fault in the steering wheel sensor, an open circuit
or short circuit in the steering signal line, or the internal circuit in the hydraulic unit
and ABS-ECU is defective.DMalfunction of steering wheel sensor
DMalfunction of wiring harness or connector
DMalfunction of hydraulic unit and ABS-ECU
NG
Repair
Replace the hydraulic unit and ABS-
ECU. OK NG YES
Repair
NOAre the diagnosis code Nos.81, 82 and
83 output at the same time?
OKCheck the following connectors:
B-123, C-128 ,
C-147 , C-230
YES
NO
Is the ACD system diagnosis code
No.31 output at the same time?
NG
Check the trouble symptom.
(1) NG
(2) NGNG
Repair
NG
OK
Check the trouble
symptom.
Check the following connectors:
C-102, C-209, C-210, C-230
Check the harness wire, and repair if
necessary.
DBetween ignition switch and steering
wheel sensor
NG
OK
Check the trouble
symptom.
Check the following connectors:
C-08, C-230
Check the harness wire, and repair if
necessary.
DBetween steering wheel sensor and
body earth
OK
Measure at the steering wheel sensor
connector C-230.
DDisconnect the connector, and
measure at the harness side
connector.
(1) Voltage between 2 and body earth
(Ignition switch: ON)
OK:System voltage
(2) Continuity between 3 and body earth
OK:Continuity
NG
RepairOK
Check the harness wire.
DBetween ABS-ECU and steering
wheel sensor NG
Repair
NG OK
Check the trouble
symptom.
Check the following connectors:
C-133, C-228, B-109
NG
Repair
Check the harness wire.
DBetween ABS-ECU and steering
wheel sensor
OK
Replace the steering wheel sensor. NG
Time Voltage
2.7 - 4.4 V
0.8 - 2.1 V
Variations in voltage when turning the steering wheel laterally
Measure at the steering wheel sensor connector C-230.
DConnect the connector and measure by turning the steering wheel laterally in the neutral
position.
DIgnition switch: ON
(1) Voltage between 1 and body earth
(2) Voltage between 4 and body earth
(3) Voltage between 5 and body earth
OK:Refer to the figure below

ABS <4WD> -Troubleshooting35B-15
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptomsInspection procedure
No.Reference page
Communication between the MUT-IIand the whole system is not
possible.135B-16
Communication between the MUT-IIand the ABS-ECU is not possible.235B-17
When the ignition key is turned to “ON” (engine stopped), the ABS
warning lamp does not illuminate.335B-18
Even after the engine is started, the ABS warning lamp remains
illuminated.435B-18
In the inspection with MUT-II service data, the parking brake switch is not
turned ON or turn OFF.535B-19
The neutral position learning of the steering wheel sensor is not finished.635B-20
Faulty ABS operation735B-21
Caution
1. If steering movements are made when driving at high speed, or when driving on road surfaces
with low frictional resistance, or when passing over bumps, the ABS may operate even though
sudden braking is not being applied. Because of this, when getting information from the customer,
check if the problem occurred while driving under such conditions as these.
2. During ABS operation, the brake pedal may vibrate or may not be able to be depressed. Such
phenomena are due to intermittent changes in hydraulic pressure inside the brake line to prevent
the wheels from locking and is not an abnormality.

ABS <4WD> -Troubleshooting35B-20
Inspection Procedure 6
The neutral position learning of the steering wheel sensor
is not finished.
Probable cause
The diagnosis is difficult because it depends on driving condition and road surface,
if the diagnosis code displays the normal code, carry out the following check.DEquipment the odd diameter tyre
DMalfunction of suspension
DMalfunction of steering wheel sensor installation
DMalfunction of stop lamp switch system
DMalfunction of hydraulic unit and ABS-ECU
NG
NG
NG
NG
Check the harness wire, and repair if necessary.
DBetween battery and stop lamp switch
DBetween stop lamp switch and ABS-ECU
OK
Check the trouble
symptom.
OK
Check the following connectors:B-123, C-103, C-108, C-130,
C-135
OK
Check the stop lamp switch. (Refer to GROUP 35A - Brake Pedal.)
Check the stop lamp switch installation condition.
(Refer to GROUP 35A - On-vehicle Service.) NO
Repair
OKNG
RepairOKNG
RepairReplace
NG
Replace the hydraulic unit
and ABS-ECU.
NG
Check the harness wire,
and repair if necessary.
DBetween stop lamp
switch and ABS-ECURepair
Check the trouble
symptom.
NG
Check the following
connectors:
C-108, C-130
Check the trouble
symptom.
OK
Check the following
connector:B-123
YES
Measure at the ABS-ECU connector B-123.
DDisconnect the connector, and measure at the harness side
connector.
DStop lamp switch: ON
DVoltage between 19 and body earth
OK:System voltage
Does the stop lamp turn on and off normally?
YES
Repair
NO
Is the odd diameter tire equipped?
YES
Repair
NO
Is the suspension abnormal?
NO
YES
When the steering wheel position is neutral, does the steering wheel
sensor (ST-N) turn ON in the MUT-II service data?Check the steering wheel sensor and the steering wheel installation
condition.

ABS <4WD> -Troubleshooting35B-21
Inspection Procedure 7
Faulty ABS operation
Probable cause
This varies depending on the driving conditions and the road surface conditions, so
problem diagnosis is difficult. However, if a normal diagnosis code is displayed, carry
out the following inspection.DImproper installation of wheel speed sensor
DMalfunction of wiring harness or connector
DMalfunction of wheel speed sensor
DMalfunction of ABS rotor
DForeign material adhering to wheel speed sensor
DMalfunction of wheel bearing
DMalfunction of hydraulic unit and ABS-ECU
OK
OK
Check the following connector:B-123
NG
Measure at the ABS-ECU connector B-123.
DDisconnect the connector, and measure at the harness side
connector.
DResistances between 6 and 7, 8 and 9, 22 and 31, 29 and
30
OK:1.24 - 1.64 kΩ
(The sensor harness and connector should be moved while
these inspections are carried out.)NG
OK
Check the trouble symptom.
OK
NG
Repair
OK
Wheel bearing check (Refer to GROUP 26 and GROUP 27 -
On-vehicle Service.)NG
Repair
OK
ABS rotor check (Refer to P.35B-34.)NG
Repair
NG
Wheel speed sensor check (Refer to P.35B-34.)NGReplace the wheel speed sensor.
OK
Wheel speed sensor output voltage check (Refer to P.35B-26.)OKHydraulic unit check (Refer to P.35B-28.)
Wheel speed sensor installation checkNG
Repair
Check the harness wire.
DBetween each wheel speed sensor and ABS-ECU
NG
Repair
NG
NG
RepairOK
Check the following connectors:B-123, C-128 vehicles>, C-43
NG
Check the trouble symptom.
RepairNG
OK
Check the harness wire.
DBetween 4WD-ECU and ABS-ECU OK
Measure at the 4WD-ECU connector C-43.
DDisconnect the connector, and measure at the harness side
connector.
DCarry out the ABS signal of the actuator test from the ABS
menu of the MUT-II.
DVoltage between 49 and body earth
OK:Less than 1.0V for initial 10 seconds, then system voltage
NGABS signal check
DDisplay the ABS signal of the service data from ACD (4WD)
menu of MUT-II.
OK:Displays OFF
DBrake in safety area, operate the ABS (possible to inspect
in first velocity of approx. 30km/h)
OK:Displays ON (in operating ABS)
NG
Check the trouble symptom.
Replace the hydraulic unit and ABS-ECU.
Check the following connectors:
A-03, A-37, A-43 , C-111, C-128, C-136 drive vehicles>, C-146, D-04, D-10, D-30