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)

1. Disconnect the connectors from the clearance warning ECU C9 and air conditioner amplifier connector A10 or A11.
2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

2 INSPECT INDICATOR

1. Remove the integration control & panel assembly with the connectors being connected.
2. Using a service wire, ground each terminal of the integration control & panel assembly connector.
3.  Turn the ignition switch ON.
4.  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

1. 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

1. Check that the malfunction disappears when a known good integration panel sub-assembly is installed.

OK: Malfunction disappears

REPLACE INTEGRATION PANEL SUB-ASSEMBLY