COMBINATION METER
TSB Revision
CHASSIS ELECTRICAL
54A-57
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the combination meter.
(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.
NO : The trouble can be an intermittent malfunction such
as a poor connection or open circuit in the CAN bus
lines between the SRS-ECU and the combination
meter (Refer to GROUP 00, How to Cope with
Intermittent Malfunction
P.00-15
).
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is set to the combination meter.
(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 combination meter.
NO : The trouble can be an intermittent malfunction such
as a poor connection or open circuit in the CAN bus
lines between the SRS-ECU and the combination
meter (Refer to GROUP 00, How to Cope with
Intermittent Malfunction
P.00-15
).
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 combination meter sets DTC
U0154.
.
JUDGMENT CRITERIA
With the ignition switch in the ON position, system
voltage between 10
− 16 volts (data from
ETACS-ECU), power supply fuse (IOD fuse) is OK,
or odometer value is 80.5 km (50 miles) or more, and
the communications with occupant classifica-
tion-ECU cannot be established for 2,500 ms or
more, the combination meter determines that a prob-
lem has occurred.
.
TROUBLESHOOTING HINTS
• The CAN bus line may be defective.
• The combination meter may be defective.
• The occupant classification-ECU may be defec-
tive.