Clearance Warning ECU Power Source Circuit

DESCRIPTION

This circuit provides power to the clearance warning ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - AIR CONDITIONER AMPLIFIER)

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

Standard resistance

2 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - BODY GROUND)

1. Measure the resistance according to the value(s) in the table below.

Standard resistance

3 INSPECT CLEARANCE WARNING ECU

1. 1
   Disconnect the clearance warning ECU connector.
2. 2
   Turn the ignition switch ON.
3. 3
   Turn the clearance sonar main switch ON.
4. 4
   Measure the voltage between terminals +B and E of the ECU.

Standard voltage: 10 to 14 V

Result

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

4 INSPECT PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY

1. Check that 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

5 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