Brake. Corolla. Zre142 Aze141
Brake Control Dynamic Control Systems. Corolla. Zre142 Aze141
Vehicle Stability Control System -- 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.
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Follow the directions on the Techstream to display the Data List and 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 the status remains on (Error displayed), check for 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 interruptions (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- EFI Communication Open EFI communication open detection / Error or Normal Error: Momentary interruption
Normal: Normal- Yaw Rate Open Yaw rate sensor open detection / Error or Normal Error: Momentary interruption
Normal: Normal- Deceleration Open Acceleration sensor open detection / Error or Normal Error: Momentary interruption
Normal: Normal- Steering Open Steering angle sensor open detection / Error or Normal Error: Momentary interruption
Normal: Normal- Master Cylinder Open Master cylinder pressure sensor open detection / Error or Normal Error: Momentary interruption
Normal: Normal- IG Voltage Value Decreased IG voltage value decrease detection / Error or Normal Error: Decrease
Normal: Normal- IG Voltage Value Increased IG voltage value increase detection / Error or Normal Error: Increase
Normal: Normal- FR Speed Sensor Voltage Open FR speed sensor voltage open detection / Error or Normal Error: Momentary interruption
Normal: Normal- FL Speed Sensor Voltage Open FL speed sensor voltage open detection / Error or Normal Error: Momentary interruption
Normal: Normal- RR Speed Sensor Voltage Open RR speed sensor voltage open detection / Error or Normal Error: Momentary interruption
Normal: Normal- RL Speed Sensor Voltage Open RL speed sensor voltage open detection / Error or Normal Error: Momentary interruption
Normal: Normal- M/C Pressure Sensor Noise Master cylinder pressure sensor noise detection / Error or Normal Error: Malfunction
Normal: Normal- Yaw Rate Sensor Voltage Open Yaw rate sensor voltage open detection / Error or Normal Error: Momentary interruption
Normal: Normal- EFI Communication Invalid EFI communication invalid detection / Error or Normal Error: Invalid
Normal: Normal- While observing the screen, gently jiggle the connector or wire harness between the ECU 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 connector and/or wire harness as one of them is faulty.
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