Toyota Sienna Service Manual: Terminals of ecm
1. Ecm
Hint: each ecm terminal's standard voltage is shown in the table below.
In the table, first follow the information under "condition".
Look under "symbols (terminal no.)" For the terminals to inspected. The standard voltage between the terminals is shown under "specific condition".
Use the illustration above as a reference for the ecm terminals.
(a) Waveform 1
Reference: 
(b) Waveform 2
Reference: 
(c) Waveform 3
Reference: 
(d) Waveform 4
Reference: 
(e) Waveform 5
Reference: 
(f) Waveform 6
Reference: 
(g) Waveform 7
Reference:
(h) Waveform 8
Reference: 
Problem symptoms table
HINT:
If a normal code is displayed during the diagnostic trouble
code check although the trouble still occurs, check the
electrical circuits for each symptom in the order given in
the chart ...
Diagnosis system
1. DESCRIPTION
(a) When troubleshooting OBD II vehicles, the only
difference from the usual troubleshooting procedure
is to connect an OBD II scan tool complying with
SAE J1987 or a intelligen ...
Other materials:
DVD Error/ Excess Current/ Tray Insertion / Ejection Error
DTC 44-44 DVD Error
DTC 44-48 Excess Current
DTC 44-50 Tray Insertion / Ejection Error
DESCRIPTION
DTC No.
DTC Detection Condition
Trouble Area
44-44
Operation error in the DVD mechanism
Television display assembly
44-48
Excess current is prese ...
Precaution
1. INSPECTION PROCEDURE FOR VEHICLE INVOLVED
IN ACCIDENT
Perform the zero point calibration and sensitivity
check if any of the following conditions occur.
The occupant classification ECU is replaced.
Accessories (seatback tray and seat cover, etc.)
are installed.
...
Brake Switch
DTC P0504 Brake Switch "A" / "B" Correlation
DTC P0724 Brake Switch "B" Circuit High
DESCRIPTION
The stop light switch is a duplex system that transmits two signals: STP and
ST1-. These two signals are
used by the ECM to monitor whether or not the brake system is ...
