Lexus IS250 IS220d GSE20 ALE20 - BRAKE CONTROL
VEHICLE STABILITY CONTROL SYSTEM (w/o VDIM) - 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 in the ECU data list function of the intelligent tester.
Turn the engine switch off and connect the intelligent tester to the DLC3.
Turn the engine switch on (IG). 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 engine switch is turned on (IG) (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 intelligent tester remains on for 1 second after the harness signal changes from momentary interruption (open circuit) to normal condition.
| Item (Display) | Measurement Item / Range (Display) | 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 | - |
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 the connector and/or wire harness as one of them is faulty.
LEXUS IS250, IS220d / GSE20 ALE20