Check For Intermittent Problems [05/2019 - ]
- CHECK FOR INTERMITTENT PROBLEMS
HINT:
A momentary interruption (open circuit) in the connectors and/or wire harnesses between the sensors and ECUs can be detected using the ECU Data List function of the Techstream.
- Turn the engine switch off.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- 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 engine switch is turned on (IG) (initial check).
- If the Error display remains displayed, measure the resistance between the ECUs and sensors, or between ECUs.
- The Error display on the Techstream will remain displayed for 1 second after the harness signal changes from momentary interruption (open circuit) to the normal condition.
Chassis > Brake > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note FR Speed Open Front speed sensor RH open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C0506-14, C0506-1F
FL Speed Open Front speed sensor LH open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C0500-14, C0500-1F
RR Speed Open Rear speed sensor RH open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C0512-14, C0512-1F
RL Speed Open Rear speed sensor LH open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C050C-14, C050C-1F
EFI Communication Open ECM communication open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related Vehicle Control History (RoB): X2079
- Related DTC: U0100-87
Yaw Rate Open Yaw rate sensor open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: U0125-87
Deceleration Open Acceleration sensor open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: U0125-87
Steering Open Steering sensor open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: U0126-87
Master Cylinder Open Master cylinder pressure sensor open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C0540-31
FR Speed Sensor Voltage Open Front speed sensor RH voltage open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C0506-14
FL Speed Sensor Voltage Open Front speed sensor LH voltage open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C0500-14
RR Speed Sensor Voltage Open Rear speed sensor RH voltage open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C0512-14
RL Speed Sensor Voltage Open Rear speed sensor LH voltage open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C050C-14
M/C Pressure Sensor Noise Master cylinder pressure sensor noise detection Under intermittent or Normal Under intermittent: Noise detected
Normal: Noise not detected- After noise occurs, if there is no noise for 5 seconds, it switches from "Under intermittent" to "Normal".
- Related DTC: C0540-49
Yaw Rate Sensor Voltage Open Yaw rate sensor voltage open detection Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C14D7-1C
EFI Communication Invalid ECM communication invalid detection Under intermittent or Normal Under intermittent: ECM communication invalid state detected
Normal: ECM communication invalid state not detected- After ECM communication invalid state occurs, if there no further invalid state occurs, it switches from "Under intermittent" to "Normal".
- Related Vehicle Control History (RoB): X2079
- Related DTC: U0100-87
Master Cylinder Pressure Sensor Power Supply Open Master cylinder pressure sensor power supply voltage status Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C0540-49
Solenoid Power Supply Open Solenoid power supply voltage status Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C143A-7F
Motor Power Supply Open Motor power supply voltage status Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C052F-14
Stop Switch Open Momentary interruption (open circuit) status in wire harness between skid control ECU (brake actuator assembly) and stop light switch assembly status Under intermittent or Normal Under intermittent: 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 "Under intermittent" to "Normal".
- Related DTC: C0540-17, C1380-7E, C1380-7F, P0571-13
- 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, the connector and/or the wire harness has caused a momentary interruption of the circuit. Repair or replace the connector and/or wire harness as one of them is faulty.
- While observing the screen, gently jiggle the connector or wire harness between the ECU and each sensors, or between ECUs.
OK
Normal is displayed.
HINT:
- If a momentary interruption occurs and Under intermittent is displayed on the Techstream, Under intermittent will remain displayed on the Techstream for 1 second after the circuit returns to normal.
- 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.
- If a momentary interruption occurs and Under intermittent is displayed on the Techstream, Under intermittent will remain displayed on the Techstream for 1 second after the circuit returns to normal.