Mitsubishi Evolution X. Manual — part 548
DIAGNOSIS
TSB Revision
KEYLESS OPERATION SYSTEM (KOS)
42B-99
STEP 3. Check the wiring harness between the inside
transmitter antenna assembly (rear) connector F-02
(terminal Nos. 3, 2, 1) and the ground for short circuit.
(1) Disconnect inside transmitter antenna assembly (rear)
connector F-02, and check the wiring harness.
(2) Check the wiring harness between inside transmitter
antenna assembly (rear) connector F-02 (terminal No.3)
and ground
OK: No continuity
(3) Check the wiring harness between inside transmitter
antenna assembly (rear) connector F-02 (terminal No.2)
and ground
OK: No continuity
(4) Check the wiring harness between inside transmitter
antenna assembly (rear) connector F-02 (terminal No.1)
and ground
OK: No continuity
Q: Is the wiring harness between inside transmitter
antenna assembly (rear) connector F-02 (terminal Nos.
3, 2, 1) and the ground in good condition?
YES : Go to Step 4.
NO [inside transmitter antenna assembly (rear)
connector F-02 terminal No.3
− ground.] : Repair the
wiring harness between inside transmitter antenna
assembly (rear) connector F-02 (terminal No.3) and
ground.
NO [inside transmitter antenna assembly (rear)
connector F-02 terminal No.2
− ground.] : Repair the
wiring harness between inside transmitter antenna
assembly (rear) connector F-02 (terminal No.2) and
the ground.
NO [inside transmitter antenna assembly (rear)
connector F-02 terminal No.1
− ground.] : Repair the
wiring harness between inside transmitter antenna
assembly (rear) connector F-02 (terminal No.1) and
the ground.
AC709707IO
Harness side: F-02
AC709707IP
Harness side: F-02
AC709707IQ
Harness side: F-02
DIAGNOSIS
TSB Revision
KEYLESS OPERATION SYSTEM (KOS)
42B-100
STEP 4. Keyless operation system communication test
Check that the communication with the inside transmitter
antenna assembly (rear) is normal (Refer to Antenna Test
).
Antennas to be checked
• rear antenna (interior)
OK: Normal is displayed.
Q: Is the check result normal?
YES : Go to Step 5.
NO : Replace the inside transmitter antenna assembly
(rear).
STEP 5. Check whether the diagnostic trouble code is
reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the LOCK (OFF) position to the
ON position.
(3) Check if the DTC is set.
Q: Is the DTC set?
YES : Replace KOS-ECU and register the ID codes (Refer
to
NO : The procedure is complete.
DIAGNOSIS
TSB Revision
KEYLESS OPERATION SYSTEM (KOS)
42B-101
DTC B2412: LF antenna power voltage
CAUTION
• If DTC No. B2412 is set, diagnose the CAN
bus lines.
• When replacing the ECU, always check that
the communication circuit is normal.
AC609427
KOS-ECU
KEYLESS
OPERATION
KEY
OUTSIDE TRANSMISSION
ANTENNA ASSEMBLY
(TRUNK LID)
INSIDE TRANSMISSION
ANTENNA ASSEMBLY
(REAR)
OUTSIDE TRANSMISSION
ANTENNA ASSEMBLY
(DRIVER'S SIDE)
INSIDE TRANSMISSION
ANTENNA ASSEMBLY
(FRONT)
OUTSIDE TRANSMISSION
ANTENNA ASSEMBLY
(PASSENGER'S SIDE)
SKY BLUE
RED- BLA
CK
RED- YELLO
W
RED- YELLO
W
SKY BLUE
SKY BLUE
SKY BLUE
BLUE
BLUE
SKY BLUE
RED- BLA
CK
RED- BLA
CK
RED- BLA
CK
RED- BLA
CK
YELLO
W
YELLO
W
SKY BLUE
SKY BLUE
SKY BLUE
SKY BLUE
RED- BLA
CK
RED- BLA
CK
RED- BLA
CK
RED- BLA
CK
BLA
CK
-BLUE
BLA
CK
-WHITE
BLA
CK
-BLUE
ORANGE
ORANGE
ORANGE
Transmission Antenna assembly Circuit
AC
DIAGNOSIS
TSB Revision
KEYLESS OPERATION SYSTEM (KOS)
42B-102
.
DTC SET CONDITION
If KOS-ECU detects an abnormality in power supply
of the outside or inside antennas, KOS-ECU sets the
DTC No. B2412.
.
TECHNICAL DESCRIPTION (COMMENT)
If an abnormality in power supply of the outside or
inside transmitter antenna is detected when power
supply of it is turned on, KOS-ECU determines that
there is a problem.
.
TROUBLESHOOTING HINTS
• Damaged wiring harness and connectors
• Malfunction of the KOS-ECU
DIAGNOSIS
Required Special Tools:
• MB992006: Extra fine probe
• MB991223: Harness set
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
AC708950AZ
Connector: C-05
AC708951BA
C-121
C-23
Connectors: C-23, C-121
AC708955AS
D-17 (BR)
D-11
D-23
Connectors: D-11, D-17, D-23
AC708954 AP
Connector: D-42
AC708970AM
Connectors: F-02, F-20
F-20
F-20 (GR)
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