Check for Intermittent Problems

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: CHECK FOR INTERMITTENT PROBLEMS

CHECK FOR INTERMITTENT PROBLEMS

1. CHECK FOR INTERMITTENT PROBLEMS

HINT: A momentary interruption (open circuit) in the connectors and/or wire harness between the sensors and ECUs can be detected in the ECU data monitor function of Techstream.

(a) Turn the ignition switch off and connect Techstream to the DLC3.





(b) Turn the ignition switch to ON. Follow the on-screen directions on Techstream to display the Data List and select areas where momentary interruption should be monitored.





HINT:
- A momentary interruption (open circuit) cannot be detected for 3 seconds after the ignition switch is turned to ON (initial check).
- If OPN DET is displayed on Techstream, check the wire harness and connectors between the ECU and sensors.
- The OPN DET display on Techstream remains on for 1 second after the harness signal changes from momentary interruption (open circuit) to normal condition.





(c) While observing the combination meter display, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs.
Result:
OPN DET display does not change.

HINT: The connector and/or wire harness are in momentary interruption (open circuit) if the display changes. Repair or replace the connector and/or wire harness as one of them is faulty.