Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Clearance Warning ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the clearance warning ECU assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY POWER SOURCE)

(a) Disconnect the I24 clearance warning ECU assembly connector.

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

(1) for HEV Model:

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

I24-1 (IG) - Body ground

Ignition switch ON

11 to 14 V

I24-1 (IG) - Body ground

Ignition switch off

Below 1 V

(2) for Gasoline model:

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

I24-1 (IG) - Body ground

Ignition switch ON

10.5 to 16 V

I24-1 (IG) - Body ground

Ignition switch off

Below 1 V

Result

Proceed to

OK

A

NG (for HEV Model)

B

NG (for Gasoline Model)

C

B

REPAIR OR REPLACE HARNESS OR CONNECTOR

C

GO TO STOP AND START SYSTEM

A

2.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I24-31 (E) - Body ground

Always

Below 1 Ω

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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