Toyota Sienna Service Manual: On-vehicle inspection
1. INSPECT BACK WINDOW (DEFOGGER WIRE)
NOTICE:
- When cleaning the glass, wipe the glass along the wire using a soft and dry cloth. Take care not to damage the wires.
- Do not use detergents or glass cleaners including abrasive ingredients.
- When measuring voltage, wrap a piece of tin foil around the tip of the negative probe and press the foil against the wire with your finger, as shown in the illustration.
- Turn the ignition switch ON.
- Turn the defogger switch ON.
- Inspect the voltage at the center of each defogger wire, as shown in the illustration.
Standard voltage
HINT: If there is approximately 10 V, the wire may be broken between the center of the wire and the end on the battery side. If there is no voltage, the wire may be broken between the center of the wire and the end on the ground side.
- Place the voltmeter positive (+) lead against the defogger wire on the battery side.
- Place the voltmeter negative (-) lead with the foil strip against the wire on the ground side.
- Slide the positive (+) lead from the battery side to the ground side.
- The point where the voltmeter deflects from approx 10 V to 0 V is the place where the defogger wire is broken.
HINT: If the defogger wire is not broken, the voltmeter indicates 0 V at the positive (+) end of the defogger wire but gradually increases to about 12 V as the meter probe moves to the other end.
2. INSPECT WIRE HARNESS (FRONT WINDOW DEICER WIRE)
- Inspect the resistance of the deicer wire.
Standard resistance
If the result is not as specified, replace the window.
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 re ...
Repair
1. REPAIR REAR WINDOW DEFOGGER WIRE
Clean the broken wire tips with grease, wax and
silicone remover.
Place the masking tape along the both sides of the
wire.
Thoroug ...
Other materials:
Diagnostic trouble code chart
If a malfunction code is displayed during the DTC check,
check the circuit listed for that code in the table below.
(Proceed to the page given for that circuit.)
POWER BACK DOOR SYSTEM
DTC No.
Detection Item
Trouble Area
B2222
PBD Pulse Sensor Malfuncti ...
System description
1. GENERAL
In conjunction with impact absorbing structure for a
frontal collision, the SRS (Supplemental Restraint
System) driver airbag and front passenger airbag
were designed to supplement seat belts in the event
of a frontal collision in order to help reduce shock to
the head and c ...
ECM Power Source Circuit
DESCRIPTION
When the ignition switch is turned to the ON position, the battery voltage is
applied to terminal IGSW of
the ECM. The ECM MREL output signal causes a current to flow to the coil,
closing the contacts of the EFI
relay and supplying power to terminal +B of the ECM.
If the igniti ...
