Power Source Circuit

PRE-COLLISION: PRE-COLLISION SYSTEM: Power Source Circuit
- Power Source Circuit

DESCRIPTION

This circuit supplies power to the seat belt control ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (GND CIRCUIT)

(a) Disconnect the D84 seat belt control ECU connectors.





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

Standard Resistance:





Text in Illustration





(c) Reconnect the seat belt control ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (IG1 CIRCUIT)

(a) Disconnect the D83 and D84 seat belt control ECU connectors.





(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





(d) Reconnect the seat belt control ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (+B CIRCUIT)

(a) Disconnect the D84 seat belt control ECU connectors.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





(c) Reconnect the seat belt control ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (+B CIRCUIT)

OK -- REPLACE SEAT BELT CONTROL ECU Removal