Check For Intermittent Problems
WARNING: This page is about a different car, the 2008 Toyota FJ Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
- 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.
- Turn the ignition switch off and connect the Techstream to the DLC3.
- Turn the ignition switch to ON. Follow the on-screen directions on the 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 to ON (initial check).
DATA LIST REFERENCETester Display Measurement Item / Range Normal Condition Diagnostic Note FR Speed Open FR speed sensor open detection / OPN_DET or NORMAL OPN_DET : Momentary interruption
NORMAL: Normal- FL Speed Open FL speed sensor open detection / OPN_DET or NORMAL OPN_DET: Momentary interruption
NORMAL: Normal- RR Speed Open RR speed sensor open detection / OPN_DET or NORMAL OPN_DET: Momentary interruption
NORMAL: Normal- RL Speed Open RL speed sensor open detection / OPN_DET or NORMAL OPN_DET : Momentary interruption
NORMAL: Normal- EFI Open EFI communication open detection / OPN_DET or NORMAL OPN_DET: Momentary interruption
NORMAL: Normal- Yaw Rate Open Yaw rate sensor open detection / OPN_DET or NORMAL OPN_DET : Momentary interruption
NORMAL: Normal- Deceleration Open Deceleration sensor open detection / OPN_DET or NORMAL OPN_DET : Momentary interruption
NORMAL: Normal- Steering Open Steering angle sensor open detection / OPN_DET or NORMAL OPN_DET: Momentary interruption NORMAL: Normal - Accumulator Open Accumulator pressure sensor open detection / OPN_DET or NORMAL OPN_DET : Momentary interruption
NORMAL: Normal- Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
- If the Techstream status remains open, check the continuity between the ECU and the sensors, or between ECUs.
- The OPEN display on the Techstream remains on for 1 second after the harness signal changes from momentary interruption (open circuit) to normal condition.
- While observing the screen, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs.
OK:
OPEN-screen display does not change.