System Description

Fig 1: Identifying Combination Meter Assembly Components

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT: 

CAN signals are transmitted to or received from the combination meter assembly through the gateway ECU.

1. Meter or Gauge

   Meter or Gauge	Communication Signal	Sender	Communication Line	Receiver
   Speedometer	Vehicle speed	Skid Control ECU	Direct Line	Combination Meter Assembly
   Tachometer	Engine speed	ECM	Direct Line	Combination Meter Assembly
   Fuel receiver gauge	Fuel level	Fuel Sender Gauge Assembly	Direct Line	Combination Meter Assembly
   	Fuel injection	ECM	CAN-BEAN	Combination Meter Assembly
   Engine Coolant Temperature Receiver	Engine coolant temperature	ECM	CAN-BEAN	Combination Meter Assembly
   ODO/TRIP meter	ODO/TRIP change switch	ODO/TRIP change switch	-	Combination Meter Assembly
   	Vehicle speed	Skid Control ECU	Direct Line	Combination Meter Assembly

2. Warning or Indicator

   Warning or Indicator	Communication Signal	Sender	Communication Line	Receiver
   MIL (Check engine warning light)	MIL (Check engine warning light)	ECM	Direct Line	Combination Meter Assembly
   Charge warning light	Charge warning light	Front Controller	BEAN	Combination Meter Assembly
   Brake warning light	Brake warning light	Skid Control ECU	CAN-BEAN	Combination Meter Assembly
   	Brake fluid level warning light	Brake Fluid Level Warning Switch	Direct Line	Combination Meter Assembly
   ABS warning light	ABS warning	Skid Control ECU	CAN-BEAN	Combination Meter Assembly
   SRS warning light	SRS warning light	Center Airbag Sensor Assembly	CAN-BEAN	Combination Meter Assembly
   Open door warning light	Open door warning light	Front Controller	BEAN	Combination Meter Assembly
   Low engine oil pressure warning light	Low engine oil pressure warning light	Front Controller	BEAN	Combination Meter Assembly
   Fuel level warning light	Fuel level	Fuel sender gauge assembly	Direct Line	Combination Meter Assembly
   Turn indicator light	Turn indicator light	Turn Signal Flasher Relay	Direct Line	Combination Meter Assembly
   High beam indicator light	High beam indicator light	Front Controller	BEAN	Combination Meter Assembly
   Cruise indicator light	Cruise indicator light	ECM	CAN-BEAN	Combination Meter Assembly
   Set indicator light	Set indicator light	ECM	CAN-BEAN	Combination Meter Assembly
   Slip indicator light	Slip indicator light	Skid Control ECU	CAN-BEAN	Combination Meter Assembly
   VSC off indicator light	VSC off indicator light	Skid Control ECU	CAN-BEAN	Combination Meter Assembly
   TRAC off*1 or TRC off indicator light	TRAC off*1 or TRC off indicator light	Skid Control ECU	CAN-BEAN	Combination Meter Assembly
   Head*1 indicator light	Head indicator light	Front Controller	BEAN	Combination Meter Assembly
   Tail*2 indicator light	Tail indicator light	Front Controller	BEAN	Combination Meter Assembly
   Shift indicator light	Shift indicator light	ECM	CAN-BEAN	Combination Meter Assembly
   Key indicator light	Key indicator light	Certification ECU	BEAN	Combination Meter Assembly
   Headlight leveling indicator light	Headlight leveling indicator light	Headlight Leveling ECU	Direct Line	Combination Meter Assembly

   • *1: for U.S.A.
   • *2: except U.S.A.
3. Cruise Information Display

   Cruise Information Display	Communication Signal	Sender	Communication Line	Receiver
   Cruise information display	DISP switch	Steering Pad Switch Assembly	Direct Line	Combination Meter Assembly
   Driving range display	Fuel level	Fuel Sender Gauge Assembly	Direct Line	Combination Meter Assembly
   	Vehicle speed	Skid Control ECU	CAN-BEAN	Combination Meter Assembly
   Average fuel consumption display	Vehicle speed	Skid Control ECU	CAN-BEAN	Combination Meter Assembly
   	Fuel injection volume	ECM	CAN-BEAN	Combination Meter Assembly
   Instantaneous fuel consumption display	Fuel injection volume	ECM	CAN-BEAN	Combination Meter Assembly
   Average vehicle speed display	Vehicle speed	Skid Control ECU	CAN-BEAN	Combination Meter Assembly
   Outside temperature display	Outside temperature	A/C Amplifier	BEAN	Combination Meter Assembly

4. Buzzer

   Buzzer	Communication Signal	Sender	Communication Line	Receiver
   Seat belt warning buzzer	Driver side seat belt warning buzzer	Body ECU	BEAN	Combination Meter Assembly
   	Front passenger side seat belt warning buzzer			Combination Meter Assembly
   Key reminder warning buzzer	Key reminder warning buzzer	Smart Key ECU	BEAN	Combination Meter Assembly
   Shift down reject buzzer	Shift down reject buzzer	ECM	CAN-BEAN	Combination Meter Assembly
   Driving with parking brake unreleased buzzer	Driving with parking brake unreleased buzzer	Body ECU	BEAN	Combination Meter Assembly
   Driving with any door opened warning buzzer	Driving with any door opened warning buzzer	Body ECU	BEAN	Combination Meter Assembly
   Speed limit exceeded warning buzzer	Speed limit exceeded warning buzzer	Skid Control ECU	CAN-BEAN	Combination Meter Assembly

1. Check the illumination function of the warning or indicator light listed below when turn the ignition switch on (IG).

   OK

   Indicator or Warning Light	Specified Condition
   Slip, Brake, ABS, VSC off, Leveling, TRAC off, MIL (Check engine warning light), Tire pressure	Indicator or warning light comes on for about 3 seconds after turning the ignition switch on (IG).
   SRS	Indicator or warning light blinks after turning the ignition switch on (IG).
   Oil pressure, Charge	Indicator or warning light comes on after turning the ignition switch on (IG).
   Washer, Maintenance	Indicator or reminder light comes on for about 3 seconds after turning the ignition switch on (IG).