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:
Short to B+ in Front Passenger Side Squib 2nd
Step Circuit
DTC B1188/56 Short to B+ in Front Passenger Side Squib 2nd
Step Circuit
DESCRIPTION
The front passenger side squib 2nd step circuit consists of the center airbag
sensor assembly and the
front passenger airbag assembly.
The circuit instructs the SRS to deploy when deployment conditions are m ...
Capacity and distribution
Cargo capacity depends on the total weight of the occupants.
(Cargo capacity) = (Total load capacity) - (Total weight of occupants)
Steps for Determining Correct Load Limit
Locate the statement “The combined weight of occupants and
cargo should never exceed XXX kg or XXX lbs.” on your ...
Safety Connect LED light Indicators
When the engine switch is turned to the “ON” position (vehicles without
a smart key system) or IGNITION ON mode (vehicles with a smart
key system), the red indicator light comes on for 2 seconds then turns
off. Afterward, the green indicator light comes on, indicating that the
service is act ...
