54A-BUZZER DOES NOT WORK.

Inspection Procedure 6: Tone alarms do not sound normally.

caution

Before replacing the combination meter, be sure to check that the power supply circuit, ground circuit, and communication circuit are normal.

TECHNICAL DESCRIPTION (COMMENT)

When the following signals are received via the CAN communication or signal line, the combination meter sounds the incorporated tone alarm according to the each pattern.

Seat belt reminder function

Electric motor switch ON signal
Driver’s seat belt switch signal
Passenger’s seat belt switch signal
Vehicles speed signal

FCM collision warning tone alarm, FCM approaching warning tone alarm, ACC approaching warning tone alarm, ACC automatic cancelling tone alarm, ACC vehicle stop/ACC vehicle-travelling-ahead missing indication tone alarm, ACC_FCM set/FCM set/ACC_FCM deactivation/cruise control set indication tone alarm

Sounding request signal from the ACC-ECU, ECM, FCM/LDW/AHB-ECU

LDW warning tone alarm

Sounding request signal from the FCM/LDW/AHB-ECU

Theft-alarm tone alarm

Electric motor switch ON signal
Sounding request signal from the ETACS-ECU

Electric steering wheel lock malfunction warning tone alarm

Sounding request signal from the OSS-ECU (The OSS-ECU uses the following input signals to send a sounding request signal)

Electric motor switch signal
LIN bus line (local) for electrical steering lock
Actuator driving permission monitoring signal

OSS-related malfunction warning tone alarm

Electric motor switch signal
When the following conditions are met, and 1 second or more has elapsed.

+B1 is detected to be ON and +B2 is detected to be OFF.
When +B1 is OFF and +B2 is ON, OSS-ECU detects that the IOD fuse is mounted.

Electric motor switch reminder tone alarm

OSS-ECU (ON) signal
Driver's door switch ON signal

Light reminder tone alarm

Electric motor switch OFF signal
Lighting switch ON signal
Driver's door switch ON signal

Door-ajar warning tone alarm

Electric motor switch ON signal
Any door switch or liftgate switch ON signal
Vehicles speed signal

Freeze warning tone alarm

Electric motor switch ON signal
Ambient temperature signal

Meter information switch or rheostat illumination switch operation tone alarm

ON signal for multi-information display switch

Turn-signal light tone alarm

Turn-signal light switch ON signal

ETACS-ECU function customize tone alarm

Sounding request signal from the ETACS-ECU

A/C operation tone alarm

Sounding request signal from the A/C-ECU

Audio operation tone alarm

Sounding request signal from the Multivision display

Parking brake reminder tone alarm

Follow trouble symptom procedure 10 when the parking brake reminder tone alarm does not sound.Refer to .

Vacuum warning tone alarm

Sounding request signal from the PHEV-ECU

Gear shift reminder tone alarm

Power supply mode ON signal of the electric motor switch
Selector position signals other than "P"

Shift cancelling tone alarm

Sounding request signal from the ETACS-ECU

READY reminder tone alarm

Power supply mode ON signal of the electric motor switch
Signal indicating that driver's door switch is open.

READY tone alarm

Sounding request signal from the PHEV-ECU

Rest reminder tone alarm

When the time to take a rest which was set on the multi information display is reached.

Meter LCD interrupt display tone alarm

A message interrupts another message shown on the multi-information display.

TPMS setting tone alarm

Ignition switch ON signal
Sounding request signal from the KOS or ETACS-ECU

Electric Parking brake warning tone alarm

Sounding request signal from the electric parking brake ECU

Brake auto hold warning tone alarm

Sounding request signal from the ASC-ECU

Brake auto hold switch cancel tone alarm

Sounding request signal from the ASC-ECU

Blind spot warning tone alarm

Sounding request signal from the BSW-ECU

Rear cross traffic alert tone alarm

Sounding request signal from the BSW-ECU

EV mode not available tone alarm

Sounding request signal from the PHEV-ECU

If the tone alarm 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.

TROUBLESHOOTING HINTS

The combination meter may be defective
The ECUs may be defective
The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line.

(1)

caution

To prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).

Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE)

(2) Press the electric motor switch to turn on the power supply mode.

(3) Diagnose the CAN bus line.

(4) Press the electric motor switch to turn off the power supply mode.

Is the CAN bus line found to be normal?

Go to Step 2

Repair the CAN bus line (Refer to GROUP 54C, Diagnosis

STEP 2. Using scan tool (M.U.T.-IIISE), read the DTC.

Check if DTC is set in the combination meter.

Is the DTC set?

Troubleshoot the combination meter. Refer to

Go to Step 3.

STEP 3. Using scan tool (M.U.T.-IIISE), read the other system DTC.

Check if DTC is set in the ECM, ASC-ECU, ACC-ECU, KOS-ECU, OSS-ECU, ETACS-ECU, PHEV-ECU and heater controller assembly (A/C-ECU), electric parking brake ECU, FCM/LDW/AHB-ECU and BSW-ECU.

Is the DTC set in the any of the above?

: Troubleshoot the engine (Refer to GROUP 13A - Diagnosis Code Chart

: Troubleshoot the ASC. Refer to GROUP 35C - Troubleshooting

: Troubleshoot the ACC. Refer to GROUP 17 - Troubleshooting

: Troubleshoot the KOS. Refer to GROUP 42B - Troubleshooting

: Troubleshoot the OSS. Refer to GROUP 42B - Troubleshooting

: Troubleshoot the ETACS (Refer to

: Troubleshoot the PHEV-ECU (Refer to GROUP 54Da - Troubleshooting

: Troubleshoot the A/C. Refer to GROUP 55 - Troubleshooting

: Troubleshoot the Electric parking brake. Refer to GROUP 36 - Troubleshooting

: Troubleshoot the FCM, LDW and automatic high beam system, refer to

: Troubleshoot the BSW/RCTA. Refer to

: Go to Step 4

STEP 4. Using scan tool (M.U.T.-IIISE), perform Special Function.

Using scan tool (M.U.T.-IIISE), select "Test" from the special function of the combination meter. Execute the following item to check the tone alarm.

Item No.3: Buzzer (AUTO)

Is the check result normal?

Go to Step 5

Replace the combination meter.

STEP 5. Retest the system

Check that the tone alarms sound normally.

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

Replace the combination meter.