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:
Rear Occupant Classification Sensor LH Collision
Detection
DTC B1787 Rear Occupant Classification Sensor LH Collision
Detection
DESCRIPTION
DTC B1787 is output when the occupant classification ECU receives a collision
detection signal sent by
the rear occupant classification sensor LH if an accident occurs.
DTC B1787 is also output when the front s ...
Disposal
HINT:
On the RH side, use the same procedures as on the LH side.
1. DISPOSE OF BACK DOOR STAY SUB-ASSEMBLY LH
Horizontally fix the stay in a vise with the piston-rod
pulled out.
Wearing safety glasses, gradually cut a part
between A and B as shown in the illustration using a
metal ...
Sliding doors
Vehicles without power sliding doors
The sliding doors can be opened and closed using the sliding
door handle. The sliding door can be locked and unlocked using
the wireless remote control, door lock switch or inside lock
knob.
Vehicles with power sliding doors
...
