Toyota Sienna Service Manual: Ignition Switch Circuit
DESCRIPTION
When the ignition switch is turned to the ON position, battery positive voltage is applied to terminal IG of the ECU. When battery positive voltage is applied to terminal IG of the ECU while the theft deterrent system is operating, the warning stops.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT FUSES (ECU-IG, AM1)
- Remove the ECU-IG and AM1 fuses from the instrument panel J/B.
- Measure the resistance.
Standard resistance: Below 1 Ω
2 INSPECT RELAY (IG1)
- Remove the IG1 relay from the instrument panel J/B.
- Check the operation of the IG1 relay.
Standard resistance
3 INSPECT IGNITION OR STARTER SWITCH ASSEMBLY
- Disconnect the I15 switch connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
4 CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE)
- Disconnect the 1A J/B connector.
- Turn the ignition switch ON.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
REPLACE INSTRUMENT PANEL J/B ASSEMBLY
Security Horn Circuit
DESCRIPTION
During the alarm sounding state, the relay in the ECU turns on and off in a
cycle of approximately 0.2
seconds, causing the security horn to sound.
WIRING DIAGRAM
INSPECTION PROC ...
Security Indicator Light Circuit
DESCRIPTION
Even when the theft deterrent system is in the disarmed state, the security
indicator blinks due to a signal
output from the immobiliser system. The security indicator blinks continuou ...
Other materials:
For vehicles equipped with catalytic converter
CAUTION: If a large amount of unburned gasoline or gasoline vapors flow
into the converter, it may cause overheating and create a fire hazard. To
prevent this, observe the following precautions:
(a) Use only unleaded gasoline.
(b) Avoid idling the engine for more than 20 minutes.
(c) ...
Location of the spare tire, jack and tools
Spare tire
Jack handle
Tire bag
Jack
Wheel nut wrench
Adapter socket
Tire strap
WARNINGUsing the tire jack
Observe the following precautions.
Improper use of the tire jack may cause the vehicle to suddenly fall off
the jack, leading to death or serious injury. ...
Lubrication system
On-vehicle inspection
1. CHECK ENGINE OIL LEVEL
(a) Warm up the engine, stop it and wait 5 minutes. The
oil level should be between the dipstick's low level
mark and full level mark.
If the engine oil level is low, check for leakage and
add oil up to the full level mark.
NOTICE:
D ...
