Toyota Venza manuals

Toyota Venza: Check For Intermittent Problems

CHECK FOR INTERMITTENT PROBLEMS

1. 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.

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) 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.
ABS/VSC/TRAC

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

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

-

IG Voltage Value Decreased

IG voltage value decrease detection / Error or Normal

Error: Decrease

Normal: Normal

-

FR Speed Sensor Voltage Open

Front speed sensor RH voltage open detection / Error or Normal

Error: Momentary interruption

Normal: Normal

-

FL Speed Sensor Voltage Open

Front speed sensor LH voltage open detection / Error or Normal

Error: Momentary interruption

Normal: Normal

-

RR Speed Sensor Voltage Open

Rear speed sensor RH voltage open detection / Error or Normal

Error: Momentary interruption

Normal: Normal

-

RL Speed Sensor Voltage Open

Rear speed sensor LH voltage open detection / Error or Normal

Error: Momentary interruption

Normal: Normal

-

(f) 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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