Mitsubishi Evolution X. Manual — part 534
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-43
DTC B2352: Antenna fail
CAUTION
When replacing the ECU, always check that the
communication circuit is normal.
.
DTC SET CONDITION
If an open circuit or short to ground occurs in the
antenna, KOS-ECU sets DTC B2352.
.
TECHNICAL DESCRIPTION (COMMENT)
When the ignition switch is turned ON with the emer-
gency operation by the inversely-inserted keyless
operation key, KOS-ECU sends signals to the
receiver antenna module. The receiver antenna
transmits random numbers to the keyless operation
key when it receives signals from KOS-ECU. If an
open circuit or short to ground occurs on the wiring
harness between KOS-ECU and receiver antenna at
this time, KOS-ECU determines that there is a prob-
lem.
.
TROUBLESHOOTING HINTS
• Malfunction of the receiver antenna module
• Damaged wiring harness and connectors
• Malfunction of KOS-ECU
Receiver Antenna Module and KOS-ECU Circuit
IMMOBILIZER
ANTENNA
KEYLESS
OPERATION
KEY
RECEIVER ANTENNA
MODULE
KOS-ECU
EMERGENCY
KEY
KEY ID
JOINT
CONNECTOR (6)
AC708950AZ
Connector: C-05
AC708951CG
Connectors: C-08, C-16
C-16 (B)
C-08
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-44
DIAGNOSIS
Required Special Tools:
• 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
STEP 1. Check receiver antenna module connector C-08,
KOS-ECU connector C-05 and joint connector (6) C-16 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is the receiver antenna module connector C-08,
KOS-ECU connector C-05 and joint connector (6) C-16
in good condition?
YES : Go to Step 2.
NO : Repair the defective connector.
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-45
STEP 2. Check the wiring harness between the receiver
antenna module connector C-08 (terminal Nos. 2, 1, 8, 12)
and the KOS-ECU connector C-05 (terminal Nos. 11, 12, 32,
7) for open circuit.
(1) Disconnect reciever anntena module connector C-08 and
KOS-ECU connector C-05, and check the wiring harness.
(2) Check the wiring harness between reciever anntena
module connector C-08 (terminal No.2) and KOS-ECU
connector C-05 (terminal No.11)
OK: Continuity exists (2
Ω or less)
(3) Check the wiring harness between reciever anntena
module connector C-08 (terminal No.1) and KOS-ECU
connector C-05 (terminal No.12)
OK: Continuity exists (2
Ω or less)
(4) Check the wiring harness between reciever anntena
module connector C-08 (terminal No.8) and KOS-ECU
connector C-05 (terminal No.32)
OK: Continuity exists (2
Ω or less)
AC709707
Harness side: C-05
DZ
Harness side: C-08
AC709707
Harness side: C-05
DZ
Harness side: C-08
AC709707
Harness side: C-05
EB
Harness side: C-08
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-46
(5) Check the wiring harness between reciever anntena
module connector C-08 (terminal No.12) and KOS-ECU
connector C-05 (terminal No.7)
OK: Continuity exists (2
Ω or less)
Q: Is the wiring harness between receiver antenna module
connector C-08 (terminal Nos. 2, 1, 8, 12) and the
KOS-ECU connector C-05 (terminal Nos. 11, 12, 32, 7) in
good condition?
YES : Go to Step 3.
NO (receiver antenna module connector C-08 terminal
No.2
− KOS-ECU connector C-05 terminal No.11.) :
Repair the wiring harness between receiver antenna
module connector C-08 (terminal No. 2) and the
KOS-ECU connector C-05 (terminal No. 11).
NO (receiver antenna module connector C-08 terminal
No.1
− KOS-ECU connector C-05 terminal No.12.) :
Repair the wiring harness between receiver antenna
module connector C-08 (terminal No. 1) and the
KOS-ECU connector C-05 (terminal No. 12).
NO (receiver antenna module connector C-08 terminal
No.8
− KOS-ECU connector C-05 terminal No.32.) :
Repair the wiring harness between receiver antenna
module connector C-08 (terminal No. 8) and the
KOS-ECU connector C-05 (terminal No. 32).
NO (receiver antenna module connector C-08 terminal
No.12
− KOS-ECU connector C-05 terminal No.7.) :
Repair the wiring harness between receiver antenna
module connector C-08 (terminal No. 12) and the
KOS-ECU connector C-05 (terminal No. 7).
AC709707EC
Harness side: C-08
Harness side: C-05
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