Mitsubishi Evolution X. Manual — part 570
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-187
STEP 3. Check the wiring harness between the KOS-ECU
connector C-05 (terminal No.38, 39) and the ground for
short circuit.
(1) Disconnect KOS-ECU connector C-05, and check the
wiring harness.
(2) Check the wiring harness between KOS-ECU connector
C-05 (terminal No.38) and ground
OK: No continuity
(3) Check the wiring harness between KOS-ECU connector
C-05 (terminal No.39) and ground
OK: No continuity
Q: Is the wiring harness between KOS-ECU connector C-05
(terminal No.38, 39) and the ground in good condition?
YES : Go to Step 4.
NO : Repair the wiring harness between KOS-ECU
connector C-05 (terminal No.38, 39) and the ground.
STEP 4. Check the wiring harness between the KOS-ECU
connector C-05 and the ground for open circuit.
(1) Disconnect KOS-ECU connector C-05, and check the
wiring harness.
(2) Check the wiring harness between KOS-ECU connector
C-05 (terminal No.14) and ground.
OK: Continuity exists (2
Ω or less)
Q: Is the wiring harness between KOS-ECU connector C-05
and the ground in good condition?
YES : Go to Step 5.
NO : Repair the wiring harness between KOS-ECU
connector C-07 and ground.
STEP 5. Retest the system
Q: Does the abnormality in KOS-ECU power supply and
ground circuits in good condition?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00, How to use
Troubleshooting/inspection Service Points - How to
Cope with Intermittent Malfunction
NO : Replace KOS-ECU and register the ID codes (Refer
to
AC709707HO
Harness side: C-05
AC709707HN
Harness side: C-05
AC709707
AC709707EM
Harness side: C-05
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-188
Inspection Procedure 4: Keyless operation warning display does not disappear.
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the com-
munication circuit are normal.
.
TROUBLESHOOTING HINTS
• Malfunction of CAN bus line
• Malfunction of combination meter
• Damaged wiring harness and connectors
• Malfunction of the KOS-ECU
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. Using scan tool MB991958, read the diagnostic
trouble code.
Check if DTC B2415 is set to the KOS-ECU.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect
scan too (M.U.T.-III)
(2) Turn the ignition switch to the "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC B2415 set?
.
NO : Go to Step 2.
STEP 2. Using scan tool MB991958, read the combination
meter diagnostic trouble code.
Check if DTC is set in the combination meter.
Q: Is the DTC set?
YES : Troubleshoot the combination meter. (Refer to
GROUP 54A, Diagnosis
NO : Go to Step 3.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-189
STEP 3. Using scan tool MB991958, read the KOS-ECU
trouble code.
Check if DTC is set to the KOS-ECU.
Q: Is the DTC set?
.
NO : Go to Step 4.
STEP 4. Check of the troubles.
Check that the keyless operation warning display turns OFF
unless the flashing or illumination conditions are met.
Q: Does the warning display operate properly?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00
− How to use
Troubleshooting/inspection Service Points
− How to
Cope with Intermittent Malfunction
NO : Replace KOS-ECU and register the ID codes. (Refer
to
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-190
Inspection Procedure 5: IG knob will not turn (keyless operation is not recognized).
CAUTION
Before replacing the ECU, ensure that the com-
munication circuit is normal.
KOS-ECU System Circuit
KOS-ECU
JOINT
CONNECTOR (6)
KEY
REMINDER
SWITCH
WHEN
REMOVING
KEY: ON
(PUSH SWITCH)
ETACS-ECU
FUSIBLE
LINK
36
RELAY
BOX
KEYLESS
OPERATION
KEY
IMMOBILIZER
ANTENNA
RECEIVER
RECEIVER ANTENNA
ASSEMBLY
RECEIVER ANTENNA
MODULE
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