ignition MITSUBISHI LANCER EVOLUTION 2007 Service Repair Manual

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-10
Code No.16 ABS-ECU power supply system (abnormal
voltage drop or rise)Probable cause
This code is output if the ABS-ECU power supply voltage drops below or rises above
the rated values.
Furthermore, turning the ignition switch to ACC will erase this code.DMalfunction of battery
DMalfunction of wiring harness or connector
DMalfunction of hydraulic unit and ABS-ECU
Caution
If battery voltage drops or rises during inspection, this code will be output as well. If the voltage
returns to standard value, this code is no longer output.
Before carrying out the following inspection, check the battery level, and refill it if necessary.
NGNG
Repair
NG
Replace the hydraulic unit and ABS-ECU.
NG
Repair
Check the harness wire, and repair if necessary.
DBetween ignition switch (IG2) and ABS-ECU
OK
Check the trouble
symptom.
OK
Check the trouble
symptom.
OK
Check the following connector:B-123
NGCheck the following connectors:B-123, C-128 vehicles>, C-130 , C-209, C-210Measure at the ABS-ECU connector B-123.
DDisconnect the connector, and measure at the harness side
connector.
DStart the engine. Voltage between 10 and body earth
OK:System voltage

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-17
Inspection Procedure 2
Communication between MUT-IIand the ABS-ECU is not
possible.
Probable cause
The cause may be an open circuit in the ABS-ECU power supply circuit or an open
circuit in the diagnosis output circuit.DBlown fuse
DMalfunction of wiring harness or connector
DMalfunction of hydraulic unit and ABS-ECU
NG OK
NG
NG NG
Repair
Check the harness wire, and repair if necessary.
DBetween ABS-ECU and diagnosis connector
OK
NG
Repair
NG
Check the harness wire, and repair if necessary.
DBetween ignition switch (IG2) and ABS-ECU
OK
NG
Repair
NG
Check the harness wire, and repair if necessary.
DBetween ABS-ECU and earth
NG
Repair
NG
Replace the hydraulic unit and ABS-ECU.
OK
Check the trouble
symptom.
OK
Check the trouble
symptom.
OK
Check the following connector:B-123
Measure at the ABS-ECU connector B-123.
DDisconnect the connector, and measure at the harness side
connector.
DContinuity between 12 and body earth, and between 34 and
body earth
OK:ContinuityCheck the following connector:B-123
OK
Check the trouble
symptom.
Measure at the ABS-ECU connector B-123.
DDisconnect the connector, and measure at the harness side
connector.
DIgnition switch: ON
DVoltage between 10 and body earth
OK:System voltageCheck the following connectors:B-123, C-128 vehicles>, C-130 , C-209, C-210
Check the trouble
symptom.
Measure at the diagnosis connector C-22 and the ABS-ECU
connector B-123.
DDisconnect the connectors, and measure at the harness side
connectors.
DContinuity between the following terminals
ABS-ECU side - Diagnosis connector side
5-1
2-7
OK:ContinuityNGCheck the following connectors:
B-123, C-22, C-26, C-28 , C-102 vehicles>, C-108, C-128 , C-130

ABS <4WD> -Troubleshooting35B-18
Inspection Procedure 3
When the ignition key is turned to “ON” (engine stopped),
the ABS warning lamp does not illuminate.
Probable cause
The cause may be an open circuit in the lamp power supply circuit, a blown lamp,
or an open circuit between the ABS warning lamp and the earth.DBlown fuse
DBurn out ABS warning lamp bulb
DMalfunction of combination meter
DMalfunction of wiring harness or connector
DMalfunction of hydraulic unit and ABS-ECU
NO
NG
Replace the ABS warning lamp bulb.
Check the harness wire.
DBetween combination meter and ABS-ECU
DBetween ignition switch (IG1) and combination meter
DBetween combination meter and earth
Replace the hydraulic unit and ABS-ECU.
OKNG
OK
Check the following connectors:
B-123, C-01, C-29 , C-128, C-210, C-213
OK
Check whether the ABS warning lamp bulb is burnt out.
Does the ABS warning lamp illuminate when the ABS-ECU
connector B-123 is disconnected and the ignition switch is turned
to ON?YES
Repair
Replace the combination meter. (Refer to GROUP 54A.)NG
Repair
Inspection Procedure 4
Even after the engine is started, the ABS warning lamp
remains illuminated.
Probable cause
The cause is probably a short-circuit in the ABS warning lamp illumination circuit.DMalfunction of combination meter
DMalfunction of wiring harness (short circuit)
DMalfunction of hydraulic unit and ABS-ECU
NOTE
This trouble symptom is limited to cases where communication with the MUT-IIis possible (ABS-ECU
power supply is normal) and the diagnosis code is a normal diagnosis code.
YES
NG
Check the harness wire.
DBetween combination meter and ABS-ECU
Replace the hydraulic unit and ABS-ECU.
OK
NG
OK
Check the trouble symptom.
Does the ABS warning lamp stay illuminated when the ABS-ECU
connector B-123 is disconnected and the ignition switch is turned
to ON?NO
Repair
Replace the combination meter. (Refer to GROUP 54A.)NG
Repair
Check the following connectors:B-123, C-01, C-128

ABS <4WD> -Troubleshooting35B-22
DATA LIST REFERENCE TABLE
The following items can be read by the MUT-IIfrom the ABS-ECU input data.
1. When the system is normal
Item No.Check itemChecking requirementsNormal value
11Front-right wheel speed sensorPerform a test runVehicle speeds
displayedonthe
12Front-left wheel speed sensor
displayedonthe
speedometer and
MUTIIareidentical13Rear-right wheel speed sensorMUT-IIareidentical.
14Rear-left wheel speed sensor
21Power supply voltageIgnition switch: ON10 - 16 V
29Parking brake switchPull the parking brake lever.ON
Release the parking brake lever.OFF
36Stop lamp switchDepress the brake pedal.ON
Release the brake pedal.OFF
37Steering wheel sensor neutral
position learningAfter driving straightly with vehicle speed more
than 10km/hON
Before driving with ignition switch ONOFF
71Lateral G sensorWhen vehicle stops2.4 - 2.6 V
When vehicle drives1.0 - 4.0 V
74Steering wheel sensor (ST-N)Ignition switch: ONSteering:
Neutral position and
position near by±
360_ON
Steering:
Except for aboveOFF
75Steering wheel sensor (ST-1)Ignition switch: ONSteering:
Turnlaterallyslowly
Display ON and OFF
alternately
76Steering wheel sensor (ST-2)
Turnlaterallyslowlyalternately
86Steering degreeIgnition switch: ON
Steering wheel sensor
tlitili
Steering: Steer by
90_to the right+90_
g
neutral position learning
is finished (service data
N37di lON)
Steering: NeutralOFF(
No. 37 displays ON)Steering: Steer by
90_to the left-90_
2. When the ABS-ECU shut off ABS operation
When the diagnosis system stops the ABS-ECU, the MUT-IIdisplay data will be unreliable.

ABS <4WD> -Troubleshooting35B-24
CHECK AT ABS-ECU
Use the following steps to remove the connector cover and
measure the terminal voltage.
1. Move the lock lever of the ABS-ECU connector as shown
in the illustration, and then disconnect the ABS-ECU
connector.
2. Push up and unlock the hooks of the ABS-ECU connector
shown in the illustration, then remove the connector cover.
TERMINAL VOLTAGE CHECK CHART
1. Measure the voltage between each terminal and earth
(terminal No.12).
2. The terminal layout is shown in the illustration.
Terminal No.Check itemChecking requirementsNormal condition
1Parking brake switch
input
Parking brake switch: ON1 V or less
input
Parking brake switch: OFFSystem voltage
2MUT-IIWhen the MUT-IIis connectedSerial communication with MUT-II
When the MUT-IIis not connected1 V or less
3ABS ON output to
4WD ECU
With ABS active (reference)(0.5 V or less)
4WD-ECU
With ABS not activeSystem voltage
4Steering wheel sensor
(ST-N) inputIgnition
switch: ONSteering wheel: Neutral
position and position
near by±360_0.8 - 2.1 V
Steering wheel: Except
for above2.7 - 4.4 V
5Diagnosis changeover
input
When the MUT-IIis connected0V
input
When the MUT-IIis not connectedApprox. 12 V
Lock lever