brake sensor MITSUBISHI LANCER EVOLUTION VI 1999 Workshop Manual

MPI – Troubleshooting13-35
INSPECTION PROCEDURE 23
Low alternator output voltage (approx. 12.3 V)
Probable cause
The alternator may be defective, or malfunctions, which are listed in the right column,
may be suspected.
Malfunction of charging system

Short circuit in harness between alternator G terminal
and engine-ECU

Malfunction of engine-ECU
Measure at the alternator connector
side. A-05

Connect the connector.
(Test harness: MB991519)

Voltage between 1 (black clip) and
earth
Engine: at idle
Radiator fan: does not run
Headlamp: OFF → ON
Brake lamp: OFF → ON
Rear defogger switch:
OFF → ON
OK:Voltages rises
by 0.2 – 3.5 V.NGMeasure at the alternator connector.
A-05

Disconnect the connector, and
measure at the harness side.

Disconnect the engine-ECU con-
nector.

Continuity between 1 and earth
OK:No continuityNGCheck the harness wire between the
alternator and the engine-ECU connec-
tor, and repair if necessary.
OK
Check the alternator.
OK
Check the harness wire between the
alternator and the engine-ECU connec-
tor.NG
Repair
OK
Replace the engine-ECU.
INSPECTION PROCEDURE 24
Power supply system and ignition switch-IG system
Probable cause
When an ignition switch ON signal is input to the engine-ECU, the engine-ECU turns
the control relay ON. This causes system voltage to be supplied to the engine-ECU,
injectors and air flow sensor.
Malfunction of the ignition switch

Malfunction of the control relay

Improper connector contact, open or short-circuited
harness wire

Disconnected engine-ECU earth wire

Malfunction of the engine-ECU
Check the control relay. (Refer to P.13-68.)NG
Replace
OK
Measure at the control relay connector B-27.

Disconnect the connector, and measure at the harness side.

Voltage between 3, 4 and earth
OK:System voltageNGCheck the following
connector: A-28NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between battery and control relay connector,
and repair if necessary.
OK
Check the engine-ECU power supply and earth circuit.
(Refer to P.13-53, INSPECTION PROCEDURE 45.)

MPI – Troubleshooting13-65
Terminal
No.Normal condition Check condition (Engine condition) Check item
41Alternator FR terminal
Engine: Warm, idle (radiator fan: OFF)

Headlamp: OFF to ON

Brake lamp: OFF to ON

Rear defogger switch: OFF to ONVoltage drops by 0.2 –
3.5 V.
45A/C switchEngine: Idle speedTurn the A/C switch OFF0 – 3 V
Turn the A/C switch ON
(A/C compressor is oper-
ating)System voltage
60Oxygen sensor heater
<EVOLUTION V VI>
Engine: Idling0 – 3 V
<EVOLUTION-V, VI>
Engine speed: 5,000 r/minSystem voltage
71Ignition switch-STEngine: Cranking8 V or more
72Intake air temperature
sensorIgnition switch: ONWhen intake air tempera-
ture is 0C3.2 – 3.8 V
When intake air tempera-
ture is 20C2.3 – 2.9 V
When intake air tempera-
ture is 40C1.5 – 2.1 V
When intake air tempera-
ture is 80C0.4 – 1.0 V
76Oxygen sensorEngine: Running at 2,000 r/min after having been
warmed up (Check using a digital type voltmeter)0 ↔ 0.8 V
(Changes repeatedly)
80Backup power supplyIgnition switch: OFFSystem voltage
81Sensor impressed
voltageIgnition switch: ON4.5 – 5.5 V
82Ignition switch-IGIgnition switch: ONSystem voltage
83Engine coolant
temperature sensorIgnition switch: ONWhen engine coolant
temperature is 0C3.2 – 3.8 V
When engine coolant
temperature is 20C2.3 – 2.9 V
When engine coolant
temperature is 40C1.3 – 1.9 V
When engine coolant
temperature is 80C0.3 – 0.9 V
84Throttle position sensorIgnition switch: ONSet throttle valve to idle
position0.3 – 1.0 V
Fully open throttle valve4.5 – 5.5 V
85Barometric pressure
sensor
Ignition switch: ONWhen altitude is 0 m3.7 – 4.3 V
sensor
When altitude is 1,200 m3.2 – 3.8 V
86Vehicle speed sensor
Ignition switch: ON

Move the vehicle slowly forward0 ↔ 5 V
(Changes repeatedly)

FRONT AXLE – General / Axle Hub and Knuckle <EVOLUTION-VI>26-1
GROUP 26
FRONT AXLE
GENERAL
OUTLINE OF CHANGE

The installation method of the ball joint between the knuckle and the lower arm has been changed,
and accordingly the removal and installation procedures of the axle hub and the knuckle have been
revised. <EVOLUTION-VI>
AXLE HUB AND KNUCKLE <EVOLUTION-VI>
REMOVAL AND INSTALLATION
Caution
(1) For vehicles with AYC, be careful when handling the pole piece at the tip of the speed sensor so as
not to damage it by striking against other parts.
(2) For vehicles with AYC, be careful not to damage the rotors installed to B.J. outer race during removal
and installation of the drive shaft.
Post-installation Operation

Check the Dust Cover for Cracks or Damage by
Pushing it with Finger.
1
23
4 5 6 7
8
12 1415
1388 Nm 108 – 127 Nm
90 – 110 Nm
15 – 33 Nm177 – 275 Nm 25 Nm
25 Nm
9 Nm
103 Nm
74 –87
Nm
11 910
1610
11
Ball joint kit
Removal steps
1. Front speed sensor<Vehicles with
AYC>
A2. Caliper assembly
3. Brake disc
4. Split pin
BA5. Drive shaft nut
6. Front hub assembly
7. Dust shield
8. Connection for lower arm ball joint
9. Connection bolt for lower arm joint10. Lower arm ball joint
11. Dust cover
12. Split pin
C13. Connection for tie rod end
D14. Front drive shaft
15. Front strut mounting bolt
16. Knuckle
NOTE
Follow the conventional procedures for removal
and installation service points.

REAR AXLE – Troubleshooting <AYC>27-13
Code No. 52: Longitudinal acceleration sensor systemProbable cause
This code is output when the longitudinal acceleration exceeds a predetermined value
while the vehicle is running with both ABS and brakes being inactive.
Defective longitudinal acceleration sensor

Defective harness or connector

Defective AYC-ECU
NG
Check and repair the harness between
longitudinal acceleration sensor and
AYC-ECU.
OK
Check the trouble symptom.
NG
Replace AYC-ECU.
OK
Check the trouble symptom.
OK
Check the following connector:
B-95NG
Repair
OK
Measure at B-95 AYC-ECU connector.

Connector connected

Ignition switch: ON

Voltage across 3 and body ground
OK:2.4 V to 2.6 V (where vehicle
in horizontal position)NGCheck the following connectors:
B-95, B-52, D-20
Check the acceleration sensor.
(Refer to P.27-42.)NG
Replace
NG
Repair
Code No. 61: Stop lamp switch systemProbable cause
This code is output under either of the following conditions:

Stop lamp switch remains ON for 15 min. or more.

There is an open-circuit in the harness between AYC-ECU and stop lamp switch.
Defective stop lamp switch

Defective harness or connector

Defective AYC-ECU
NG
Replace AYC-ECU.
OK
Check the trouble symptom.
OK
Check the following connector:
B-95NG
Repair
OK
Measure at the B-95 AYC-ECU con-
nector.

Disconnect the connector and
measure at the harness side.

Voltage across 11 and body ground

Brake pedal not depressed.
OK:1 V or lessNGCheck and repair the harness between
AYC-ECU and stop lamp switch.
Check the stop lamp switch.NG
Replace

REAR AXLE – On-vehicle Service <Vehicles with AYC>27-37
WHEEL SPEED SENSOR OUTPUT VOLTAGE
MEASUREMENT <VEHICLES WITHOUT ABS>
1. Lift up the vehicle and release the parking brake.
2. Disconnect the AYC-ECU harness connector and take
measurements on the harness side connector.
Caution
Insert the probe from the harness side with the double
lock of the connector unlocked. Inserting it to the
terminal side could result in poor contact.
3. Turn the wheel to be tested at about 1/2 to one
revolution/sec. and check for the output voltage using
a circuit tester (AC mV range) or oscilloscope.
Terminal nos.
Front LHFront RHRear LHRear RH
7698
20192221
Output voltage:
When circuit tester is used: 70 mV or more
When oscilloscope is used: 200 mVp-p or more
(4) If the output voltage is lower than the above value, it
is probably attributable to the following faults. Check or
replace the wheel speed sensor as necessary.

Excessive clearance between the pole piece and rotor
of the wheel speed sensor

Defective wheel speed sensor
Waveform Check Using Oscilloscope
Check the harness and connector of the wheel speed sensor
for connection. Then, use an oscilloscope to check for output
voltage waveform of each sensor as follows.
Start the engine and monitor the sensor by turning the wheel;
for a driving wheel, let it turn by shifting into the 1st gear
and for a driven wheel turn it manually at a constant speed.
NOTE
(1) Waveform may be observed by actually running the
vehicle.
(2) The output voltage is low when the wheel speed remains
low and builds up as the wheel speed increases.
AYC-ECU connector harness side
When turned manually
At idle (5 to 6 km/h)
1st gear

BASIC BRAKE SYSTEM – Master Cylinder and Brake Booster35A-5
MASTER CYLINDER AND BRAKE BOOSTER
<L.H. DRIVE VEHICLES>
REMOVAL AND INSTALLATION
Pre-removal Operation

Brake Fluid Draining

Air Intake Hose RemovalPost-installation Operation

Brake Fluid Supplying

Brake Line Bleeding

Brake Pedal Adjustment (Refer to P.35A-2.)

Air Intake Hose Installation
15–18 Nm 15 Nm
Sealant: 3M ATD Part No.
8661 or equivalent
6
7 3
14
2
8
5
4
14 Nm
5 9
1
10 Nm
Removal steps
1. Brake pipe connection
2. Brake fluid level sensor connector
3. Master cylinder assembly
B
Clearance adjustment between brake
booster push rod and primary piston
A4. Vacuum hose
(With built-in check valve)5. Fitting
6. Snap pin
7. Clevis pin assembly
8. Brake booster
9. Sealer

BASIC BRAKE SYSTEM – Master Cylinder and Brake Booster35A-7
MASTER CYLINDER
DISASSEMBLY AND REASSEMBLY
Master cylinder kit
11
14
1312
141315 1
4 2
3
6
8
9 5
7
10
12
15
13
14Brake fluid: DOT3 or DOT4
11
Disassembly steps
1. Reservoir cap assembly
2. Reservoir cap
3. Diaphragm
4. Filter
5. Brake fluid level sensor
6. Float
7. Reservoir stopper bolt8. Reservoir tank
9. Reservoir seal
A10. Piston stopper bolt
11. Gasket
B12. Piston stopper ring
13. Primary piston assembly
14. Secondary piston assembly
15. Master cylinder body

– Engine Compartment WIRING HARNESS
CONFIGURATION DIAGRAMS
Connector
symbol
–01
thru
–50
A
Earth cable
C-4
WIRING HARNESS CONFIGURATION DIAGRAMS
ENGINE COMPARTMENT
A-01 (2-B) Brake fluid level switch
A-03 (1-B) Noise condenser
A-04 (1) Alternator
A-05 (4-GR) Alternator
A-09 (1-B) Starter
A-10 (1) Starter
A-12 (2-B) Fuel pressure solenoid valve
A-16 (4-B) Throttle position sensor
A-18 (6-B) Idle speed control servo
A-19 (3-B) Vehicle speed sensorA-20 (4-B) Windshield wiper motor
A-21 (8-B) Hydraulic unit <vehicles with ABS>
A-22 (2-B) Hydraulic unit <vehicles with ABS>
A-23 (2-B) Waste gate solenoid valve
A-25 (7-B) Air flow sensor
A-26 (2-B) Front speed sensor (LH) <vehicles with
ABS>
A-28 (10-B) Control harness and front harness
combination

– Floor and Roof WIRING HARNESS
CONFIGURATION DIAGRAMS
NOTE
The connectors with framed
number are newly introduced.
C-13
D-19 (2-B) Rear speed sensor (RH)
<vehicles with ABS>
D-20 (3-B) Acceleration sensor <vehicles with ABS>
D-21 (1-B) Parking brake switch
D-27 (2) Body harness and rear harness combina-
tion <vehicles with AYC>D-31 (2) Water spray switch
D-32 (3-B) Acceleration sensor (lateral)
<vehicles with AYC>