Toyota Sienna Service Manual: Terminals of ECU
1. COMBINATION METER ASSEMBLY
*1: with Power Rear No. 2 Seat with Stowing Function
*2: with Theft Deterrent System
- Waveform 1 (Reference) : Using an oscilloscope:
OK:
HINT: As vehicle speed increases, the cycle of the signal waveform narrows.
- Waveform 2 (Reference) : Using an oscilloscope:
OK:
2. ACCESSORY METER ASSEMBLY
3. COMBINATION METER INNER CIRCUIT
*1: for Optitron Meter, Power Rear No. 2 Seat with
Stowing Function
*2: for Optitron Meter, with Theft Deterrent System
*3: without VSC
*4: with VSC
Problem symptoms table
ENTIRE SYSTEM
METER GAUGES
WARNING LIGHTS
INDICATOR LIGHTS
BUZZER
ACCESSORY METER ASSEMBLY
...
Diagnosis system
1. CHECK DLC3
The ECU uses the ISO 15765-4 for communication
protocol. The terminal arrangement of the DLC3
complies with SAE J1962 and matches the ISO
15765-4 format.
NOTICE:
...
Other materials:
Mass or Volume Air Flow Circuit
DESCRIPTION
The Mass Air Flow (MAF) meter is a sensor that measures the amount of air
flowing through the throttle
valve. The ECM uses this information to determine the fuel injection time and to
provide appropriate airfuel
ratio. Inside the MAF meter, there is a heated platinum wire whic ...
Installation
1. INSTALL SEAT POSITION AIRBAG SENSOR
Check that the ignition switch is off.
Check that the negative battery (-) terminal is
disconnected.
CAUTION:
After disconnecting the negative battery
terminal, wait for at least 90 seconds before
starting the operation.
...
Removal
1. REMOVE BACK DOOR GARNISH CENTER
2. REMOVE BACK DOOR SIDE GARNISH LH
3. REMOVE BACK DOOR SIDE GARNISH RH
4. REMOVE BACK DOOR STRAP COVER
5. REMOVE BACK DOOR PULL STRAP
6. REMOVE BACK DOOR TRIM BOARD ASSEMBLY
7. REMOVE BACK DOOR SERVICE HOLE PLATE
8. REMOVE REAR SPOILER COVER (W/ REAR
SPOIL ...