Toyota Sienna Service Manual: Ignition Switch Circuit
DESCRIPTION
The Multiplex network body ECU receives the ACC and IG signals from the ignition switch.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
- Connect the intelligent tester to DLC3.
- Turn the ignition switch ON and push the intelligent tester main switch ON.
- Select the items below in the DATA LIST, and read the displays on the intelligent tester.
BODY NO.1:
2 INSPECT FUSE
- Inspect the ECU ACC fuse, ECU-IG fuse and AM1 fuse in instrument panel junction block assembly.
3 INSPECT RELAY
- Inspect ACC relay continuity.
Resistance
- Inspect IG1 relay continuity.
Resistance
4 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC, IG)
- Measure the voltage between the terminals as shown in the chart below.
Voltage
5 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (+B)
- Measure voltage between the terminal 1A-1 of the instrument panel junction block assembly and body ground.
Voltage
6 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
- Measure voltage between the terminal 1H-10 of the instrument panel junction block assembly and body ground.
Voltage
REPAIR OR REPLACE HARNESS OR CONNECTOR
Light Sensor Circuit Malfunction
DTC B1244 Light Sensor Circuit Malfunction
DESCRIPTION
This DTC is output when failure in the light sensor circuit is detected.
DTC No.
DTC Detection Condition
Trouble Area ...
Headlight Relay Circuit
DESCRIPTION
The Multiplex network body ECU controls HEAD relay when signal is received
from headlight dimmer
switch assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 PERFORM ACTIVE TEST BY IN ...
Other materials:
Correct use of the seat belts
Make sure that all occupants are wearing their seat belts before driving
the vehicle. Use a child restraint system appropriate for the child until the child
becomes large enough to properly wear the vehicle’s seat belt.
Adjusting the mirrors
Make sure that you can see backward clearly by adjus ...
Vehicle Speed Sensor Malfunction
DTC P0500 Vehicle Speed Sensor Malfunction
DTC P0503 Vehicle Speed Sensor "A" Intermittent / Erratic /
High
DESCRIPTION
The cruise control system uses the same vehicle speed signal that is sent to the
ECM for the SFI system.
If DTC P0500 is detected, perform the diagnosis using th ...
Fastening the seat belt (for the third center seat)
Take the plate out of the holder,
and then pull down the seat
belt.
Push plate “A” into buckle “A”
until a click sound is heard.
Push plate “B” into buckle “B”
until a click sound is heard.
...
