Check For Intermittent Problems [08/2017 - 08/2019]

HINT: 

A momentary interruption (open circuit) in the connectors and/or wire harness between the sensors and ECUs can be detected using the Data List function of the Techstream.

1. Turn the ignition switch off.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON.
4. Turn the Techstream on.
5. Follow the directions on the 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 Error remains displayed for one of the items on the Techstream, check for continuity between the ECU and the item for which Error is displayed.
   • If a momentary interruption occurs and Error is displayed on the Techstream, Error will remain displayed on the Techstream for 1 second after the circuit returns to normal.
   ABS/VSC/TRAC
   
   

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   EFI Communication Open	EFI communication open detection	Error or Normal	Error: Momentary interruption detected Normal: Momentary interruption not detected	After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
   Yaw Rate Open	Yaw rate sensor open detection	Error or Normal	Error: Momentary interruption detected Normal: Momentary interruption not detected	After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
   Deceleration Open	Acceleration sensor open detection	Error or Normal	Error: Momentary interruption detected Normal: Momentary interruption not detected	After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
   Steering Open	Steering angle sensor open detection	Error or Normal	Error: Momentary interruption detected Normal: Momentary interruption not detected	After a momentary interruption occurs, if there is no momentary interruption for 1 second, it switches from "Error" to "Normal".
   IG Voltage Value Decreased	+BS voltage value decrease detection	Error or Normal	Error: Low voltage detected Normal: Low voltage not detected	After low voltage occurs, if there is no low voltage error for 1 second, it switches from "Error" to "Normal". Error: 9.8 V or less
   IG Voltage Value Increased	+BS voltage value increase detection	Error or Normal	Error: High voltage detected Normal: High voltage not detected	After high voltage occurs, if there is no high voltage error for 1 second, it switches from "Error" to "Normal". Error: 17.4 V or higher

6. While observing the screen, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs.

   OK

   Normal is displayed.

   HINT: 

   If the display changes, this indicates that there has been a momentary interruption (open circuit) in the connector and/or wire harness. In this case, repair or replace the connectors and/or wire harnesses as one of them is faulty.