Clearance Warning ECU Power Source Circuit

PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: Clearance Warning ECU Power Source Circuit

Clearance Warning ECU Power Source Circuit

DESCRIPTION

This circuit provides power to the clearance warning ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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





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






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - BODY GROUND)





(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. INSPECT CLEARANCE WARNING ECU





(a) Disconnect the clearance warning ECU connector.
(b) Turn the ignition switch ON.
(c) Turn the clearance sonar main switch ON.
(d) Measure the voltage between terminals +B and E of the ECU.
Standard voltage:
10 to 14 V
Result:






C -- INSPECT INTEGRATION PANEL SUB-ASSEMBLY
B -- INSPECT PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY
A -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
4. INSPECT PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY
(a) Check that the malfunction disappears when a known good printed wire integration board sub-assembly is installed.
OK:
Malfunction disappears.
NG -- REPLACE AIR CONDITIONER AMPLIFIER
OK -- REPLACE PRINTED WIRE INTEGRATION BOARD SUB-ASSEMBLY
5. INSPECT INTEGRATION PANEL SUB-ASSEMBLY
(a) Check that the malfunction disappears when a known good integration panel sub-assembly is installed.
OK:
Malfunction disappears.
NG -- REPLACE AIR CONDITIONER AMPLIFIER
OK -- REPLACE INTEGRATION PANEL SUB-ASSEMBLY