Toyota Sienna Service Manual: Indicator Circuit
DESCRIPTION
The indicator displays the location of the obstacle and the approximate distance between the vehicle and the obstacle either by blinking or turning on.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - AIR CONDITIONER AMPLIFIER)
- Disconnect the connectors from the clearance warning ECU C9 and air conditioner amplifier connector A10 or A11.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
2 INSPECT INDICATOR
- Remove the integration control & panel assembly with the connectors being connected.
- Using a service wire, ground each terminal of the integration control & panel assembly connector.
- Turn the ignition switch ON.
- Check that each LED comes on.
Result
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3 INSPECT PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY
- Check the malfunction disappears when a known good printed wire integration board sub-assembly is installed
OK: Malfunction disappears.
REPLACE PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY
4 INSPECT INTEGRATION PANEL SUB-ASSEMBLY
- Check that the malfunction disappears when a known good integration panel sub-assembly is installed.
OK: Malfunction disappears
REPLACE INTEGRATION PANEL SUB-ASSEMBLY
No. 2 Clearance Warning Buzzer Circuit
DESCRIPTION
The clearance warning ECU receives the ultrasonic sensor signal to sound the
rear warning buzzer.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (CLEARANCE WAR ...
Horn
...
Other materials:
Input instructions
(a) The general VIN input instructions using the
intelligent tester are shown below:
(b) The arrow buttons (UP, DOWN, RIGHT and LEFT)
and numerical buttons (0 to 9) are used to input the
VIN.
(c) Cursor Operation
To move the cursor around the tester screen, press
the RIGHT and LEFT buttons. ...
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
INSPECTIO ...
Ignition key cylinder light
ON-VEHICLE INSPECTION
1. KEY CYLINDER LIGHT ASSEMBLY
Connect the battery positive (+) lead to the terminal
1 and the battery negative (-) lead to the terminal 2,
and check that the indicator light comes on.
2. TRANSPONDER KEY AMPLIFIER
Inspect key cylinder light o ...