Related Tests, Information and Procedures

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 list function of the intelligent tester.







a. Turn the ignition switch off and connect the intelligent tester to the DLC3.

Part 1:

Part 2:

b. Turn the ignition switch on. Follow the directions on the intelligent tester 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 on (initial check).

HINT:
- If the status remains on (ERROR displayed), check the continuity between the ECU and the sensors, or between ECUs.
- The ERROR display on the intelligent tester 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.

Result: ERROR display does not change.

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