Brake. Yaris. Ncp93, 131
Brake Control Dynamic Control Systems. Yaris. Ncp93, 131
Anti-Lock Brake System (For Sedan) -- Check For Intermittent Problems |
| 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 using the ECU Data List function of the Techstream.
Turn the ignition switch off and connect the Techstream to the DLC3.
Turn the ignition switch to ON. 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 the status remains on (error displayed), check the continuity between the ECU and the sensors, or between ECUs.
- The "Error" display on the Techstream remains on for 1 second after the harness signal changes from momentary interruption (open circuit) to normal condition.
ABS/VSC/TRAC Tester Display Measurement Item/Range Normal Condition Diagnostic Note FR Speed Open FR speed sensor open detection / Error or Normal Error: Momentary interruption
Normal: Normal- FL Speed Open FL speed sensor open detection / Error or Normal Error: Momentary interruption
Normal: Normal- RR Speed Open RR speed sensor open detection / Error or Normal Error: Momentary interruption
Normal: Normal- RL Speed Open RL speed sensor open detection / Error or Normal Error: Momentary interruption
Normal: Normal- While observing the screen, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs.
- OK:
- Error display does not change.
- HINT:
- If the display changes, the connector and/or the wire harness has caused a momentary interruption of the circuit. Repair or replace the connector and/or wire harness because one of them is faulty.
| SYMPTOM SIMULATION |