Mitsubishi Evolution X. Manual — part 605
DIAGNOSIS
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WIRELESS CONTROL MODULE (WCM)
42C-37
DTC B2352: Antenna fail
.
DTC SET CONDITION
WCM sets DTC B2352 when open or short circuit to
the ground in the antenna is detected.
.
TECHNICAL DESCRIPTION (COMMENT)
When the ignition switch is turned ON, WCM trans-
mits signal to the antenna. When the antenna is
found faulty, WCM determines that the abnormality is
present.
.
TROUBLESHOOTING HINT
Malfunction of WCM (Open circuit in antenna)
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
Recheck for diagnostic trouble code.
Check again if the DTC is set to the WCM.
CAUTION
To prevent damage to scan tool (MB991958), always turn
the ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"
position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Replace WCM and register the ID codes (Refer to
NO : The procedure is complete.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
DIAGNOSIS
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WIRELESS CONTROL MODULE (WCM)
42C-38
DTC B2401: Keyless/KOS key ID not register
CAUTION
• If DTC B2401 is set, be sure to diagnose the
CAN bus line.
• When replacing the ECU, always check that
the communication circuit is normal.
.
DTC SET CONDITION
If the keyless ID registered transmitter is not regis-
tered to the WCM, the WCM sets the DTC No.
B2401.
.
TECHNICAL DESCRIPTION (COMMENT)
If the number of keyless ID registered transmitter is
zero, the WCM determines that there is a problem.
.
TROUBLESHOOTING HINTS
• Malfunction of CAN bus line
• Failure of transmitter registration process
• Malfunction of WCM
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
CAUTION
To prevent damage to scan tool (MB991958), always turn
the ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES : Go to Step 2.
NO : Repair the CAN bus line (Refer to GROUP 54C,
).
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
DIAGNOSIS
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WIRELESS CONTROL MODULE (WCM)
42C-39
STEP 2. Register the keyless ID and recheck the
diagnostic trouble code.
Register the keyless ID (Refer to
), and recheck if the
DTC is set.
(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 WCM and register the ID codes (Refer to
NO : The procedure is complete.
DTC B2415: RA module power voltage
CAUTION
• If DTC B2415 is set, diagnose the CAN bus
lines.
• When replacing the ECU, always check that
the communication circuit is normal.
AC709290
JOINT
CONNECTOR (6)
RECEIVER
KEYLESS
ENTRY
TRANSMITTER
WIRELESS
CONTROL
MODULE
RECEIVER
ANTENNA
ASSEMBLY
Wireless Control Module System Input Signal
AB
RED
RED
GREEN -RED
GREEN -RED
YELLOW
-GREEN
YELLOW
-GRAY
YELLOW
-GRAY
BROWN -WHITE
BROWN -WHITE
RED- WHITE
RED- WHITE
RED
GREEN -RED
BROWN -WHITE
RED- WHITE
DIAGNOSIS
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WIRELESS CONTROL MODULE (WCM)
42C-40
.
DTC SET CONDITION
If an open circuit or short to ground occurs in the
receiver antenna assembly, WCM sets DTC B2415.
.
TECHNICAL DESCRIPTION (COMMENT)
The receiver antenna assembly receives the trans-
mitter signal. The receiver antenna assembly trans-
mits the received signal to the WCM. If an open
circuit or short to ground occurs on the wiring har-
ness between WCM and receiver antenna assembly
at this time, WCM determines that there is a prob-
lem.
.
TROUBLESHOOTING HINTS
• Malfunction of CAN bus line
• Malfunction of the receiver antenna assembly
• Malfunction of the WCM
• Damaged wiring harness and connectors
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
AC708951AY
Connectors: C-07, C-16
C-16 (B)
C-07
AC708950BA
Connector: C-41
AC708955AM
Connector: D-14
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