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Diagnosis Circuit








CRUISE CONTROL SYSTEM: Diagnosis Circuit

Diagnosis Circuit

DESCRIPTION

Making a short circuit between terminals TC and CG of the DLC3 will output DTCs from the DLC3.

WIRING DIAGRAM





HINT: When a particular warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in the relevant ECU is suspected.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)





(a) Disconnect the connector from the ECM.





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





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND)





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





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (TC of DLC3 - BODY GROUND)





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





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU
OK -- REPLACE ECM
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