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:
Symptom confirmation and diagnostic trouble code
HINT:
The diagnostic system in the SIENNA has various
functions.
The first function is the Diagnostic Trouble Code
(DTC) check. A DTC is a code stored in the ECU
memory whenever a malfunction in the signal circuits
to the ECU occurs. In a DTC check, a previous
malfunction's DTC can be ...
Back door courtesy switch
INSPECTION
1. BACK DOOR LOCK ASSEMBLY (WITH OUT POWER BACK DOOR)
Inspect back door courtesy light switch operation.
Check that there is resistance between the
terminal 5 and the terminal 6 when the back
door is open and closed.
Resistance:
Back door is open:
10 k& ...
Problem symptoms table
WINDOW DEFOGGER SYSTEM
Symptom
Suspected area
w/ Deicer: Front window deicer does not operate.
(indicator light ON)
FR DEF fuse
Front window deicer relay
Front window deicer wire
Wire harness
w/ deicer: Front window deicer ...