voltage MITSUBISHI LANCER EVOLUTION VI 1999 Manual Online

SRS – Troubleshooting / SRS Maintenance52B-15
Inspection Procedure 2
Communication with MUT-II is not possible.
(Communication is not possible with SRS only.)
Probable cause
If communication is not possible with the SRS only, the cause is probably an open circuit
in the diagnosis output circuit of the SRS or in the power circuit (including earth circuit).
Malfunction of wiring harnesses or connectors

Malfunction of SRS-ECU
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS-ECU and earth, and
repair if necessary.
OK
Check trouble symptoms.
NG
Check the harness wire between the SRS-ECU and ignition switch
IG
1, and repair if necessary.
Measure at SRS check harness
connector (5).

Disconnect SRS-ECU
connector B-51.

Connect SRS check
harness connector (3).

Continuity between
terminals (20)
OK:ContinuityNGCheck the following
connectors:
B-51, B-78, B-80NG
RepairSRS check harness
(MB991613)
3
5
OK
Replace the SRS-ECU.
OK
Check the harness wire between the SRS-ECU and diagnosis
connector.NG
Repair
OK
Measure at SRS check harness connector (5).

Disconnect SRS-ECU connector B-51.

Connect SRS check harness connector (3).

Ignition switch: ON

Voltage between terminal (13) and body earth
OK:9 V or more

Voltage between terminal (14) and body earth
OK:9 V or moreNGCheck the following
connectors:
B-51, B-78, B-76NG
Repair
SRS MAINTENANCE
The SRS must be inspected by an authorized dealer 10 years
after the date of vehicle registration.
SRS WARNING LAMP CHECK
Turn the ignition key to the “ON” position. Does the SRS
warning lamp illuminate for about 7 seconds, turn off and
then remain extinguished for at least 5 seconds? If yes, SRS
system is functioning properly. If no, consult page 52B-6.
SRS warning lamp

CHASSIS ELECTRICAL – Battery54-4
CHARGING
1. When charging a battery while still installed in the vehicle,
disconnect the battery cables to prevent damage to
electrical parts.
2. The current normally used for charging a battery should
be approximately 1/10th of the battery capacity.
3. When performing a quick-charging due to lack of time,
etc., the charging current should never exceed the battery
capacity as indicated in amperes.
4. Determining if charging is completed.
(1) If the specific gravity of the battery fluid reaches
1.250–1.290 and remains constant for at least one
hour.
(2) If the voltage of each cell reaches 2.5–2.8 V and
remains constant for at least one hour.
Caution
1. Be careful since the battery fluid level may rise
during charging.
2. Keep all sources of fire away while charging
because there is a danger of explosion.
3. Be careful not to do anything that could generate
sparks while charging.
4. When charging is completed, replace the battery
caps, pour clean water over the battery to remove
any sulfuric acid and dry.

CHASSIS ELECTRICAL – Battery54-5
BATTERY TESTING PROCEDURE
TEST STEP
(1) Turn headlamps on for 15 seconds.
(2) Turn headlamps off for 2 minutes to allow battery voltage to
stabilize.
(3) Disconnect cables.
Read open circuit voltage.
OK:Open circuit voltage is more than 12.4 VNGCharge battery at 5 amps. (see LOAD TEST RATE CHART)
RetestOK
(1) Connect a load tester to the battery.
(2) Load the battery at the recommended discharge rate (see LOAD
TEST RATE CHART).
(3) Read voltage after 15 seconds, then remove load.
(4) Compare the measured value with the minimum voltage (see
LOAD TEST CHART).
OK:Higher than minimum voltageNG
Replace battery
OK
Normal
LOAD TEST RATE CHART
Battery type28B19L34B19L44B20L95D31L55D23L55B24L
Charging time when fully discharged h
[5-amp rated current charging]56713108
Load test (Amps)120130160310170170
LOAD TEST CHART
Temperature C21 and
above16 to
2010 to
154 to 9–1 to 3–7 to
–2–12 to
–8–18 to
–13
Minimum voltage V9.69.59.49.39.18.98.78.5

CHASSIS ELECTRICAL – Ignition Switch54-7
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
Key hole illumination lamp remains illuminated.
Probable cause
The cause is probably a harness short or a defective ETACS-ECU or buzzer ECU.
Malfunction of harness wire

Malfunction of ETACS-ECU

Malfunction of buzzer ECU
Disconnect the ignition key cylinder illumination lamp connector
B-84 and measure the continuity:

Between 4 and body earth
OK:ConductingNGCheck the harness wire between the ignition key cylinder illumination
lamp and junction block, and repair if necessary.
OK
Replace the ETACS-ECU or buzzer ECU.
Inspection Procedure 2
Even if driver’s side door is opened, key hole illumination
lamp does not illuminate.
Probable cause
The cause is probably a defective key hole illumination lamp circuit system, or a
defective driver’s side door switch input circuit system if the ignition key reminder
warning buzzer is also faulty.
Malfunction of driver’s side door switch

Malfunction of bulb

Malfunction of connector

Malfunction of harness wire

Malfunction of ETACS-ECU

Malfunction of buzzer ECU
OK
Replace ETACS-ECU or buzzer ECU.

MUT-II Pulse check
Driver’s side door switch input signal
OK:The MUT-II buzzer sounds once
when the driver’s side door switch
is ON.NG
Driver’s side door switch input circuit
system inspection (Refer to Inspection
Procedure 6 on P.54-10.)
OK
Disconncet the key hole illumination
lamp connector B-84, and measure at
the harness side.

Voltage between 3 and body earth
OK:System voltageNGCheck the following connectors:
B-49, B-75, B-73NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between
ETACS-ECU or buzzer ECU and fusible
link 1, and repair if necessary.
Vehicle with buzzer ECU
Remove ETACS-ECU or buzzer ECU
from junction block, and measure at the
junction block connector B-79

Ignition key cylinder illumination
lamp connector connected

Voltage between 12 and body earth
OK:System voltage
OK
OK
NG
Check the following connectors:
B-84, B-49, B-75, B-73NG
Repair
OK
Check trouble symptom.
Check the harness wire between the
ignition key cylinder illumination lamp
and fusible link 1, and repair if neces-
sary.
NG

CHASSIS ELECTRICAL – Ignition Switch54-8
Inspection Procedure 3
While key hole illumination lamp is illuminated, ignition
key is turned to the ON position but key hole illumination
lamp does not switch off. (However, it switch off after 15
seconds.)
Probable cause
While the key reminder warning buzzer is sounding, the
ignition key is turned to the ON position but the sound
dose not stop. (However, it stops when the driver’s side
door is closed.)
The cause is probably a malfunction of the ignition switch input circuit, ETACS-ECU
or buzzer ECU. Furthermore, if there is a malfunction of a multipurpose fuse, the
cause may also be a short circuit in a harness.
Malfunction of fuse

Malfunction of connector

Malfunction of harness

Malfunction of ETACS-ECU

Malfunction of buzzer ECU
OK
Replace ETACS-ECU.

MUT-II Pulse check
Ignition switch input inspection
OK:The MUT-II buzzer sounds once
when the ignition key is turned
to the ON from OFF position.

NG
Disconnect the junction block connector
B-76 and measure at the harness side.

Voltage between the terminal No.
8 and body earth.
OK:System voltageNGCheck the following connectors:
B-76, B-79Repair
OK
Check trouble symptom.
Replace the buzzer ECU.
Replace ETACS-ECU.
Check the harness wire between the
ignition switch (IG1) and junction block
and repair if necessary.
OK
Junction block harness continuity check
NG
NOTE
The stop indicated with a dotted line
applies only to vehicles with buzzer
ECU. OK
NG
Replace NG

CHASSIS ELECTRICAL – Ignition Switch54-10
Inspection Procedure 5
The key reminder warning buzzer dose not sound even if
the driver’s side door is opened while the key is still
inserted. (However, the ignition key should be in the OFF
position.)
Probable cause
The cause is probably a malfunction of the door switch input circuit system, if the
key hole illumination lamp is also faulty. A malfunction of the key reminder switch
input circuit system is also suspected.
Malfunction of door switch

Malfunction of key reminder switch

Malfunction of connector

Malfunction of harness

Malfunction of ETACS-ECU

Malfunction of buzzer ECU
Driver’s side door switch input circuit
system inspection (Refer to Inspection
Procedure 6 on P.54-10.)
OK

MUT-II Pulse check
Key reminder switch input inspection
OK:The MUT-II buzzer sounds once
when the ignition key is removed
from the key cylinder.NGKey reminder switch continuity inspec-
tion (Refer to P.54-12.)NG
Replace
OK
Inspect the harness between the key
reminder switch and junction block.NG
Repair
OK
Replace the ETACS-ECU.OK

MUT-II Pulse check
Driver’s side door switch input signal
OK:The MUT-II buzzer sounds once
when the driver’s side door switch
is turned to the ON position.NG
OK
Junction block harness continuity checkNG
Repair

OK
Inspect the harness between the key
reminder switch and body earth.
Replace the buzzer ECU.
NOTE
The stop indicated with a dotted line
applies only to vehicles with buzzer
ECU.NG
Repair
Inspection Procedure 6
Driver’s side door switch input circuit system inspection
Door switch inspectionNG
Replace
OK
Disconnect the door switch connector
D-03 and measure at the harness side.

Voltage between the terminal No.
2 and body earth
OK:System voltageNGCheck the following connectors.
B-80, B-79NG
Repair
OK
Check trouble symptom.NGCheck the harness between the ETACS-
ECU or buzzer ECU door switch and
repair if necessary.
OK
Check trouble symptom.
NG
Replace the ETACS-ECU or the buzzer
ecu.OK
Check the following connectors.
D-03

CHASSIS ELECTRICAL – Ignition Switch and Immobilizer System54-18
Inspection Procedure 4
Malfunction of the immobilizer-ECU power supply and earth circuit
Measure at the immobilizer-ECU con-
nector B-100.

Disconnect the connector and
measure at the harness side.
(1) Voltage between 2 and body earth
(Ignition switch: ON)
OK: System voltage
(2) Voltage between 1 and body earth
OK: System voltage
(3) Continuity between 8 and body earth
OK: Continuity(1) NGCheck the following connectors:
B-76, B-74, B-100NG
Repair
OK
Check trouble symptoms.
NG
Check the fuse and the harness wire
between the ignition switch (IG) and
immobilizer-ECU.NG
OK
Check trouble symptoms.NGCheck the ignition switch.
(Refer to P.54-20.)
(2) NG
Check the following connectors:
B-65, B-100NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between the
immobilizer-ECU and the engine control
relay, and repair if necessary.
(3) NG
Check the following connectors.
B-50, B-100NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between the
immobilizer-ECU and body earth, and
repair if necessary. Repair
CHECK AT IMMOBILIZER-ECU
TERMINAL VOLTAGE CHECK CHART
Terminal No.SignalChecking requirementsTerminal voltage
1Immobilizer-ECU power supplyIgnition switch: ONSystem voltage
2Ignition switch-IGIgnition switch: OFF0V
Ignition switch: ONSystem voltage
8Immobilizer-ECU earthAlways0V

CHASSIS ELECTRICAL – Combination Meters54-24
TROUBLESHOOTING
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptomInspection
procedureReference
page
Speedometer does not work.154-24
Tachometer does not work.254-25
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
Inspection Procedure 1
Speedometer does not work.
Probable cause
Examine the diagnosis codes registered in the engine-ECU. If no wheel speed
sensor-relating diagnosis code has been output, the wheel speed sensors are in order.
Malfunction of vehicle speed sensor

Malfunction of speedometer

Malfunction of harness or connector

Malfunction of relevant ECU
Disconnect the combination meter con-
nectors B-08 or B-09 and measure at
the harness sides.
1. Continuity between the terminal
No.11 and earth
OK: Continuity
2. Voltage between terminal No.51 and
earth.
OK: 4.7 V or more
3. Voltage between the terminal No.22
and earth
OK: System voltage1. NG
OK
Replace the speedometer.YES
Vehicle speed sensor circuit system
inspection (Refer to Inspection
Procedure 3 on P.54-26.)
OK
Check the following connectors.
B-09, B-50NG
Repair
OK
Check trouble symptom.
Check the harness between the body
earth and combination meter, and repair
if necessary.NG
2. NGCheck the following connectors.
B-08, B-64, A-19NG
Repair
OK
Check trouble symptom.
Check the harness between the com-
bination meter and the vehicle speed
sensor, repair if necessary.NG
3. NGCheck the following connectors.
B-09, B-49, B-75, B-73NG
Repair
OK
Check trouble symptom.
Check the harness between the power
supply and combination meter, and
repair if necessary.NG
MUT-II Self-Diag code
Is the diagnosis code 24 relating to MPI
system output?

CHASSIS ELECTRICAL – Combination Meters54-25
Inspection Procedure 2
Tachometer does not work.
Probable cause
The ignition signal may not be input from the engine, or there may be a malfunction
in the power supply or earth circuit.
Malfunction of tachometer

Malfunction of harness or connector
Disconnect the combination meter con-
nector B-08 and measure at the harness
sides.
1. Measure the voltage between
terminal No.33 and earth.
OK: 5 V
2. Continuity between the terminal
No.34 and earth
OK: Continuity
3. Voltage between the terminal No.42
and earth
OK: System voltage1. NGCheck the following connectors.
B-08, A-36, B-61, B-64, A-41, A-109NG
Repair
OK
Check trouble symptom.NGCheck the harness between the engine-
ECU and combination meter, and repair
if necessary.
2. NGCheck the following connectors.
B-08, B-50, B-64, A-41NG
Repair
OK
Check trouble symptom.NGCheck the harness between the com-
bination meter and the body earth, and
repair if necessary. OK
Replace the tachometer.
3. NG
Check the following connectors.
B-08, B-75, B-76NG
Repair
OK
Check trouble symptom.NGCheck the harness between the power
supply and combination meter, and
repair if necessary.
YESRefer to Group 13 – Troubleshooting,
No. 44 Ignition coils and power
transistors.
OK
MUT-II Self-Diag code
Is the diagnosis code 44 relating to MPI
system output?

CHASSIS ELECTRICAL – Combination Meters54-26
Inspection Procedure 3
Vehicle speed sensor circuit system inspection
Signals from the vehicle speed sensor are utilized both in the speedometer and the engine-ECU.
Vehicle speed sensor inspection (Refer to P.54-27.)NG
Replace
OK
Disconnect the vehicle speed sensor connector A-19 and measure
at the harness side.
1. Voltage between the terminal No.1 and earth
OK: System voltage
2. Continuity between terminal No.2 and earth
OK: Continuity
3. Voltage between the terminal No.3 and earth
OK: 4.5 V or more1. NGCheck the following
connectors. A-19, B-64NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between the vehicle speed sensor and
multi-purpose fuse 4, and repair if necessary.3. NG
Check the following
connectors. A-19, B-64,
B-08NG
Repair
2. NGCheck the following
connector. A-19NG
RepairOK
Check trouble symptom.
NG
Check the harness between the vehicle speed sensor and combina-
tion meter, and repair if necessary.OK
Check trouble symptom.
NG
Check the harness wire between the vehicle speed sensor and
body earth, and repair if necessary.
NOTE
If the trouble symptom still persists even after the above procedures are performed, check the vehicle
speed senosor output signal side circuit (harness, speedometer and engine ECU) for short-circuit.