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:
ECM / PCM Internal Engine Off Timer Performance
DTC SUMMARY
DESCRIPTION
To ensure the accuracy of the EVAP (Evaporative Emission) monitor values, the
soak timer, which is built
into the ECM, measures 5 hours (+/- 15 minutes) from when the ignition switch is
turned off, before the
monitor is run. This allows the fuel to cool down, whic ...
Ambient temperature sensor
ON-VEHICLE INSPECTION
1. INSPECT A/C AMBIENT TEMPERATURE SENSOR
(a) Remove the A/C ambient temperature sensor.
(b) Disconnect the connector from A/C ambient
temperature sensor.
(c) Measure the resistance according to the value(s) in
the table below.
Standard resistance
NOTICE:
E ...
Camshaft Position "A" Actuator Circuit
DESCRIPTION
The Variable Valve Timing (VVT) system includes the ECM, Oil Control Valve
(OCV) and VVT controller.
The ECM sends a target duty-cycle control signal to the OCV. This control signal
regulates the oil
pressure supplied to the VVT controller. Camshaft timing control is perform ...
