COMBINATION METER ASSEMBLY AND VEHICLE SPEED SENSOR
TSB Revision
CHASSIS ELECTRICAL
54A-67
CAUTION
If DTC U1109 is set in the combination meter,
diagnose the CAN main bus line.
CAUTION
Whenever the ECU is replaced, ensure that the
communication circuit is normal.
.
CIRCUIT OPERATION
The ETACS-ECU communicates with the combina-
tion meter and the powertrain control module via
CAN bus line to obtain necessary information. Both
the combination meter and the powertrain control
module have terminator resistors.
.
DTC SET CONDITION
The combination meter receives signal from the
ETACS-ECU via CAN bus lines. If it can not receive
all the necessary signals from the ETACS-ECU, DTC
U1109 is set.
.
TECHNICAL DESCRIPTION (COMMENT)
Current trouble
• Connector(s) or wiring harness in the CAN bus
lines between the ETACS-ECU and the combina-
tion meter, the power supply system to the
ETACS-ECU, the ETACS-ECU itself, or the com-
bination meter may be defective.
Past trouble
• Carry out diagnosis with particular emphasis on
connector(s) or wiring harness in the CAN bus
lines between the ETACS-ECU and the combina-
tion meter, and the power supply system to the
ETACS-ECU. For diagnosis procedures, refer to
"How to cope with past trouble" (Refer to GROUP
00, How to Use Troubleshooting/Inspection Ser-
vice Points
P.00-6
).
NOTE: For a past trouble, you may not find it by
the MUT-III CAN bus diagnostics even if there is
any failure in CAN bus lines. In this case, refer to
GROUP 00, How to Use Troubleshooting/Inspec-
tion Service Points-How to Cope with Intermittent
Malfunction
P.00-6
.) and check the CAN bus
lines. You can narrow down the possible cause of
the trouble by referring to the DTC, which is set
regarding the CAN communication-linked ECUs
(Refer to GROUP 54C, CAN bus line Diagnostics
Flow
P.54C-6
).
.
TROUBLESHOOTING HINTS
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector.
• Malfunction of ETACS-ECU
• Malfunction of combination meter (incorporating
ECU)
AC305206
CONNECTOR: A-02
AO
A-02 (GR)
AC305216
B-19 (B)
CONNECTOR: B-19
AD
AC305231
C-02
C-29
C-101
DD
CONNECTORS: C-02, C-29, C-101
AC305413AL
CONNECTOR: C-218
C-218 (GR)