Mitsubishi Lancer Evolution VI. Manual — part 82
BODY –
General / Keyless Entry System
42-2
GENERAL
OUTLINE OF CHANGE
D
The descriptions of the troubleshooting using on MUT-
II
tester have been incorporated.
KEYLESS ENTRY SYSTEM
SPECIAL TOOL
Tool
Number
Name
Use
MB991502
MUT-
II
sub assembly
Recording secret codes
TROUBLESHOOTING
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom
Inspection procedure No.
Reference page
None of the doors can be locked or unlocked using the transmitter.
1
42-2
All of the doors can be locked and unlocked using the transmitter,
but the room lamp does not flash or illuminate. (However, the room
lamp operates normally when the doors are opened and closed.)
2
42-4
Secret codes cannot be registered.
3
42-4
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
None of the doors can be locked or unlocked using the
transmitter.
Probable cause
The cause may be a malfunction of the transmitter, a malfunction of the receiver
or the lock and unlock signals are not being input to the ETACS-ECU.
D
Malfunction of transmitter
D
Malfunction of receiver
D
Malfunction of ETACS-ECU
D
Malfunction of wiring harness or connector
D
Malfunction of key reminder switch
D
Malfunction of door switch
NG
To next page
OK
Replace the transmitter battery. (Refer to P.42-7.)
Yes
Has the secret code been registered properly? *
NG
Re-register the secret code. (Refer to P.42-8.)
Can the doors be locked and unlocked by the driver’s-side door
key cylinder and lock knob?
No
Check the centre door lock system.
NOTE
*: This should be done if a transmitter or receiver has been replaced, and if a secret code has not
been registered properly.
BODY –
Keyless Entry System
42-3
NG
Repair
NG
Check the harness wire, and repair if necessary.
D
Between receiver and earth
NG
Repair
OK
Replace the ETACS-
ECU.
NG
Repair
OK
Replace the transmitter.
NG
Replace the receiver.
NG
Check the harness wire.
D
Between key reminder switch and receiver
D
Between key reminder switch and earth
NG
Repair
OK
Check trouble symptoms.
OK
Check the following connectors:
B-50, B-84, D-01
NG
Repair
OK
Key reminder switch continuity check (Refer to GROUP 54 – Ignition
Switch.)
NG
Replace
NG
Check the harness wire.
D
Between receiver and door switch
NG
Repair
OK
Check trouble symptoms.
OK
Check the following connectors:
D-01, D-03, D-06, D-17, F-12, F-26
NG
Repair
NG
Check the harness wire.
D
Between ETACS-ECU and receiver
OK
Door switch continuity check
NG
Replace
OK
Check trouble symptoms.
OK
Measure at the receiver connector D-01.
D
Disconnect the connector, and measure at harness side.
D
Voltage between 12 and body earth
D
Voltage between 14 and body earth
OK: System voltage
NG
Check the connectors:
B-77, D-01
OK
Check trouble symptoms.
OK
Measure at the receiver connector D-01.
D
Disconnect the connector, and measure at the harness side.
D
Continuity between 20 and body earth
OK: Continuity
NG
Check the following connectors:
B-50, D-01
NG
Repair
NG
Check the harness wire, and repair if necessary.
D
Between ignition switch and receiver
D
Between fusible link No.1 and receiver
OK
Check trouble symptoms.
Measure at the receiver connector D-01.
D
Disconnect the connector, and measure at the harness side.
D
Voltage between 9 and body earth
D
Voltage between 10 and body earth
OK: System voltage
NG
Check the following connectors:
B-49, B-73, B-75, B-76
From previous page
BODY –
Keyless Entry System
42-4
INSPECTION PROCEDURE 2
All of the doors can be locked and unlocked using the
transmitter, but the room lamp does not flash or
illuminate. (However, the room lamp operates normally
when the doors are opened and closed.)
Probable cause
If the room lamp operates normally when the doors are opened and closed, the cause
of the problem may be a malfunction of the receiver or a malfunction of the harness
between the room lamp the receiver.
D
Malfunction of receiver
D
Malfunction of connector or wiring harness
NG
Repair
NG
Check the harness wire between room lamp and receiver, and
repair if necessary.
OK
Replace the receiver.
OK
Check trouble symptoms.
Measure at the receiver connector D-01.
D
Disconnect the connector, and measure at the harness side.
D
Voltage between 11 and body earth
OK: System voltage
NG
Check the following connectors:
B-80, D-01
INSPECTION PROCEDURE 3
Secret codes cannot be registered.
Probable cause
The cause may be a malfunction of the diagnosis connector, a malfunction of the
power supply or earth circuit of the receiver, a malfunction of the earth circuit or
a malfunction of the diagnosis output circuit.
D
Malfunction of receiver
D
Malfunction of MUT-
II
D
Malfunction of connector or wiring harness
NG
Repair
NG
Check the harness wire, and repair if necessary.
D
Between receiver and diagnosis connector
NG
Repair
NG
Check the harness wire, and repair if necessary.
D
Between fusible link No.1 and diagnosis connector
OK
Check trouble symptoms.
NG
Check the harness wire, and repair if necessary.
D
Between diagnosis connector and earth
Yes
To next page
NG
Check the following
connectors:
B-22, B-50
NG
Repair
OK
Measure at the diagnosis
connector B-22.
D
Continuity between 4
and body earth
D
Continuity between 5
and body earth
OK: Continuity
OK
Replace MUT-
II
.
OK
Check trouble symptoms.
No
Measure at the diagnosis
connector B-22
D
Voltage between 16
and body earth
OK: System voltage
NG
Check the following connectors:
B-22, B-49, B-75
OK
Can the MUT-
II
communicate with other systems?
OK
Check trouble symptoms.
Measure at the diagnosis connector B-22 and the receiver connector
D-01.
D
Disconnect the connector, and measure at harness side.
D
Continuity between following terminals:
OK: Continuity
7 <Receiver side> – 1 <Diagnosis connector side>
NG
Check the following connectors:
B-22, D-01
BODY –
Keyless Entry System
42-5
NG
Repair
NG
Check the harness wire, and repair if necessary.
D
Between fusible link No.1 and receiver
D
Between ignition switch and receiver
NG
Repair
NG
Check the harness wire, and repair if necessary.
D
Between receiver and earth
OK
Replace the receiver.
OK
Check trouble symptoms.
OK
Measure at the receiver connector D-01.
D
Disconnect the connector, and measure at the harness side.
D
Between 20 and body earth
OK: Continuity
NG
Check the following connectors:
B-50, D-01
OK
Check trouble symptoms.
Measure at the receiver connector D-01.
D
Disconnect the connector, and measure at the harness side.
D
Voltage between 9 and body earth
D
Voltage between 10 and body earth
OK: System voltage
NG
Check the following connectors:
B-49, B-75, D-01
From previous page
INSPECTION OF RECEIVER TERMINAL VOLTAGE
Terminal
Signal name
Conditions
Terminal voltage
2
Door switch
One or more doors are open (Door switch: ON)
0 V
All doors are closed (Door switch: OFF)
System voltage
6
Door lock actuator
switch (driver’s side)
LOCK
5 V and pulse output*
switch (driver’s side)
UNLOCK
0 V
7
Diagnosis changeover
input
When MUT-
II
is connected
0 V
input
When MUT-
II
is disconnected
System voltage
8
Key reminder switch
OFF (When ignition key is inserted)
5 V and pulse output*
ON (When ignition key is removed)
0 V
9
Ignition switch
Ignition switch: ACC or ON
System voltage
Ignition switch: OFF
0 V
10
Receiver power supply
At all times
System voltage
11
Room lamp output
One or more door are open (Door switch: ON)
0 V
All doors are closed (Door switch: OFF)
System voltage
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