Check for Intermittent Problems

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

CHECK FOR INTERMITTENT PROBLEMS

1. DESCRIPTION

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

(a) Turn the ignition switch off and connect Techstream to the DLC3.
(b) Turn the ignition switch on. Follow the on-screen directions on Techstream to display the Data List and select areas which should be monitored for momentary interruptions.

HINT: A momentary interruption (open circuit) cannot be detected for 3 seconds after the ignition switch is turned on (initial check).

ABS/VSC/TRAC





HINT:
- If Techstream status remains open, check the continuity between the ECU and the sensors, or between ECUs.





- 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 screen, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs. If the display changes, the connector and/or wire harness will be in momentary interruption (open circuit). Repair or replace connector and/or wire harness as one of them is faulty.