Check for Intermittent Problems

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: 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 the Techstream.

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.

(f) Select areas where momentary interruptions 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 Error is displayed, check for continuity between the ECUs and the sensors or between ECUs.
* Error remains displayed on the Techstream for 1 second after the harness signal changes from a momentary interruption (open circuit) to normal.

ABS/VSC/TRAC





(g) While observing the screen, gently jiggle the connectors or wire harnesses between the ECUs and sensors or between ECUs.

OK:

Normal display appears.

HINT
The connector and/or wire harness has a momentary interruption (open circuit) if the display changes. Repair or replace the connectors and/or wire harnesses as one of them is faulty.