Toyota Parking Assist-Sensor System - Ecu Power Source Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BATTERY AND BODY GROUND)
TOYOTA PARKING ASSIST-SENSOR SYSTEM - ECU Power Source Circuit
DESCRIPTION
This circuit is the power source circuit to operate the parking assist ECU. The parking assist ECU controls the TOYOTA parking assist-sensor system, parking assist monitor system (w/ Side Monitor System), side monitor system and wide view front monitor system. When a malfunction occurs in this circuit, each system will be abnormal.
WIRING DIAGRAM

INSPECTION PROCEDURE
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - BATTERY AND BODY GROUND) |
Disconnect the parking assist ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection | Condition | Specified Condition |
F75-4 (GND1) - Body ground | Always | Below 1 Ω |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection | Condition | Specified Condition |
F75-1 (+B) - F75-4 (GND1) | Always | 11 to 14 V |
F75-8 (IG) - F75-4 (GND1) | Engine switch on (IG) | 11 to 14 V |
F75-9 (ACC) - F75-4 (GND1) | Engine switch on (ACC) | 11 to 14 V |
Text in Illustration*a | Front view of wire harness connector (to Parking Assist ECU) |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
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OK | |
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PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE ()
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