Mitsubishi Evolution X. Manual — part 561
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-151
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) 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 KOS-ECU and register the ID codes (Refer
to
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00
− How to use
Troubleshooting/inspection Service Points
− How to
Cope with Intermittent Malfunction
DTC U0151: SRS-ECU CAN timeout
CAUTION
• If DTC U0151 is set, be sure to diagnose the
CAN bus line.
• When replacing the ECU, always check that
the communication circuit is normal.
.
DIAGNOSTIC FUNCTION
If no signal from SRS-ECU can be received,
KOS-ECU sets diagnostic trouble code No. U0151.
.
TROUBLESHOOTING HINTS
• The CAN bus line may be defective
• The SRS-ECU may be defective
• Malfunction of 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
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-152
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 con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
Scan Tool (M.U.T.-III)
(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,
).
STEP 2. Using scan tool MB991958, read the SRS-ECU
diagnostic trouble code
Check again if the DTC is set to the SRS-ECU.
Q: Is the DTC set?
YES : Troubleshoot the SRS (Refer to GROUP 52B
− SRS,
).
NO : Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) 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 KOS-ECU and register the ID codes (Refer
to
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00
− How to use
Troubleshooting/inspection Service Points
− How to
Cope with Intermittent Malfunction
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-153
DTC U0154: Occupant classification-ECU CAN timeout
CAUTION
• If DTC U0154 is set, be sure to diagnose the
CAN bus line.
• When replacing the ECU, always check that
the communication circuit is normal.
.
DIAGNOSTIC FUNCTION
When the signals from occupant classification-ECU
cannot be received, the KOS-ECU sets DTC U0154.
.
TROUBLESHOOTING HINTS
• The CAN bus line may be defective.
• The KOS-ECU may be defective.
• The occupant classification-ECU may be defec-
tive.
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, diagnose the CAN bus
line
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 the
Scan Tool (M.U.T.-III)
(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,
).
STEP 2. Using scan tool MB991958, read the SRS-ECU
diagnostic trouble code.
Check if DTC is set to the SRS-ECU.
Q: Is the DTC set?
YES : Troubleshoot the SRS (Refer to GROUP 52B
− SRS,
).
NO : Go to Step 3.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-154
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.
(1) 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 KOS-ECU and register the ID codes (Refer
to
NO : The trouble can be an intermittent malfunction (Refer
to GROUP 00
− How to use
Troubleshooting/inspection Service Points
− How to
Cope with Intermittent Malfunction
DTC U0155: Combination meter CAN timeout
CAUTION
• If DTC U0155 is set, be sure to diagnose the
CAN bus line.
• When replacing the ECU, always check that
the communication circuit is normal.
.
TROUBLE JUDGMENT
If no signal from the combination meter can be
received, KOS-ECU sets DTC U0155.
.
TROUBLESHOOTING HINTS
• Malfunction of CAN bus line
• Combination meter malfunction
• Malfunction of 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
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