Inspection Procedure
7: Buzzers do not sound normally.
caution
Before replacing the combination
meter, be sure to check that the power supply circuit, earth circuit, and communication circuit
are normal.
COMMENTS ON TROUBLE SYMPTOM
When the following signals are received via the CAN communication or signal line, the
combination meter sounds the incorporated buzzer according to the each pattern. Reverse (R) position reminder buzzer
Ignition switch ON signal
Selector lever R position signal
Electric steering wheel lock malfunction warning buzzer (vehicles
with KOS)
Ignition switch signal
LIN bus line (local) for electrical steering lock
Actuator driving permission monitoring signal
OSS-related malfunction warning buzzer (vehicles with KOS)
Engine switch signal
When the following conditions are met, and 1 second or more has elapsed.
IOD is detected to be ON and +B is detected to
be OFF.
When IOD is OFF and +B is ON, KOS&OSS-ECU detects that the IOD
fuse is mounted.
Engine switch reminder buzzer (vehicles with KOS)
Engine switch ON signal
Driver’s door switch ON signal
Keyless operation key reminder buzzer (vehicles with KOS)/ignition
key reminder buzzer (vehicles without KOS)
Ignition switch OFF signal
IG knob push switch ON signal
Driver’s door switch ON signal
Lamp reminder buzzer
Ignition switch OFF signal
Lighting switch ON signal
Driver’s door switch ON signal
Door-ajar warning buzzer
Ignition switch ON signal
Any door switch or tailgate switch ON signal
Vehicles speed signal
Freeze warning buzzer
Ignition switch ON signal
Ambient temperature signal
Parking brake reminder buzzer
Ignition switch ON signal
Parking brake switch
Vehicles speed signal
Multi-information display switch operation buzzer
ON signal for multi-information display switch
Turn-signal lamp buzzer
Turn-signal lamp switch ON signal
ETACS-ECU function customise buzzer
Sounding request signal from the ETACS-ECU
A/C operation buzzer
Sounding request signal from the A/C-ECU
If the buzzer does not sound normally, the connector(s) and wiring harness in the CAN
bus lines, or the ETACS-ECU or the combination meter may have a problem.
PROBABLE CAUSES
Malfunction of combination meter
Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C -
Troubleshooting ).
STEP 2. M.U.T.-III diagnosis code
Check if diagnosis code is set in the combination meter.
Q.
Is the diagnosis code set?
Refer to .
Go to Step 3.
STEP 3. M.U.T.-III other system diagnosis code
Check if diagnosis code is set in the engine-ECU, CVT-ECU, ABS-ECU, KOS&OSS-ECU,
ETACS-ECU or A/C-ECU or heater control unit.
Q.
Is the diagnosis code set in the any of the above?
Set in the engine-ECU. : Troubleshoot the engine (Refer to GROUP 13A -
Troubleshooting ).
Set in the CVT-ECU. : Troubleshoot the CVT. Refer to GROUP 23A -
Diagnosis code chart .
Set in the ABS-ECU. : Troubleshoot the ABS. Refer to GROUP 35B -
Troubleshooting .
Set in the KOS&OSS-ECU. : Troubleshoot the KOS. Refer to GROUP 42B -
Troubleshooting .
Set in the ETACS-ECU. : Troubleshoot the ETACS. Refer to .
Set in the A/C-ECU/Heater control unit. : Troubleshoot the A/C-ECU/Heater control unit. Refer to GROUP
55B -
Troubleshooting .
The diagnosis code is not set. : Go to Step 4.
STEP 4. Check by M.U.T.-III "Special Function"
Using M.U.T.-III, select "Test" from the special function of the combination meter. Execute
the following item to check the buzzer.
Item 3: Buzzer(AUTO)
Q.
Is the check result normal?
Go to Step 5.
Replace the combination meter.
STEP 5. Retest the system
Check that the buzzers sound normally.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How
to use Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunction ).