Mitsubishi Evolution X. Manual — part 706
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-271
STEP 2. Using scan tool MB991958, read the ETACS-ECU
diagnostic trouble code
Check again if the DTC is set to the ETACS-ECU.
Q: Is the DTC set?
YES : Diagnose the ETACS-ECU.
NO : Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the SRS-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 the SRS-ECU (Refer to
).
NO : There is an intermittent malfunction such as poor
engaged connector(s) or open circuit (Refer to
GROUP 00, How to use Troubleshooting/inspection
Service Points
DTC U0154: Occupant Classification-ECU CAN Timeout
CAUTION
• If the DTC U0154 is set, be sure to diagnose
the CAN main 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 SRS-ECU sets the DTC
U0154.
.
JUDGMENT CRITERIA
Because of the CAN-B bus circuit malfunction, if
SRS-ECU becomes unable to perform the normal
data transmission, SRS-ECU determines that an
abnormality is present.
.
TROUBLESHOOTING HINTS
• The CAN bus line may be defective
• The occupant classification-ECU may be defec-
tive
• The SRS-ECU may be defective
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 (Vehicles with
CAN communication system)
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-272
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
."
(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 occupant
classification-ECU diagnostic trouble code.
Check if the DTC is set to the occupant classification-ECU.
Q: Is the DTC set?
YES : Diagnose the occupant classification-ECU.
NO : Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the SRS-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 the SRS-ECU (Refer to
).
NO : There is an intermittent malfunction such as poor
engaged connector(s) or open circuit (Refer to
GROUP 00, How to use Troubleshooting/inspection
Service Points
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-273
DTC U0155: Combination Meter CAN Timeout
CAUTION
• If the DTC U0155 is set, be sure to diagnose
the CAN main bus line.
• When replacing the ECU, always check that
the communication circuit is normal.
.
TROUBLE JUDGMENT
If the signal from combination meter cannot be
received, the SRS-ECU sets the DTC U0155.
.
JUDGMENT CRITERIA
Because of the CAN-B bus circuit malfunction, if
SRS-ECU becomes unable to perform the normal
data transmission, SRS-ECU determines that an
abnormality is present.
.
TROUBLESHOOTING HINTS
• The CAN bus line may be defective
• The combination meter may be defective
• The SRS-ECU may be defective
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 (Vehicles with
CAN communication system)
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
."
(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
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-274
STEP 2. Using scan tool MB991958, read the combination
meter diagnostic trouble code
Check if DTC is set to the combination meter.
Q: Is the DTC set?
YES : Diagnose the combination meter.
NO : Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set to the SRS-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 the SRS-ECU (Refer to
).
NO : There is an intermittent malfunction such as poor
engaged connector(s) or open circuit (Refer to
GROUP 00, How to use Troubleshooting/inspection
Service Points
DTC U0164: A/C-ECU CAN Timeout
CAUTION
• If the DTC U0164 is set, be sure to diagnose
the CAN main bus line.
• When replacing the ECU, always check that
the communication circuit is normal.
.
DIAGNOSTIC FUNCTION
If the signal from A/C-ECU cannot be received, the
SRS-ECU sets the DTC U0164.
.
JUDGMENT CRITERIA
Because of the CAN-B bus circuit malfunction, if
SRS-ECU becomes unable to perform the normal
data transmission, SRS-ECU determines that an
abnormality is present.
.
TROUBLESHOOTING HINTS
• The CAN bus line may be defective
• The A/C-ECU may be defective
• The SRS-ECU may be defective
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 (Vehicles with
CAN communication system)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст