Check For Intermittent Problems
WARNING: This page is about a different car, the 2006 Toyota Tundra and 2005 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
- 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 monitor function of the hand-held tester.
- Turn the ignition switch off and connect the hand-held tester to the DLC3.
- Turn the ignition switch on. Follow the on-screen directions on the hand-held 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 ignition switch is turned on (initial check).
DATA LIST REFERENCEItem Measurement Item / Range (Display) Normal Condition Diagnostic Note SPD SEN FR FR speed sensor open detection / OPEN or NORMAL OPEN: Momentary interruption NORMAL: Normal - SPD SEN FL FL speed sensor open detection / OPEN or NORMAL OPEN: Momentary interruption NORMAL: Normal - SPD SEN RR RR speed sensor open detection / OPEN or NORMAL OPEN: Momentary interruption NORMAL: Normal - SPD SEN RL RL speed sensor open detection / OPEN or NORMAL OPEN: Momentary interruption NORMAL: Normal - HINT:
- If the hand-held tester's status remains open, check the continuity between an ECU and sensors, or between ECUs.
- The OPEN display on the hand-held tester remains on for 1 second after the harness signal changes from momentary interruption (open circuit) to normal condition.
- While observing the screen, gently jiggle the connector or wire harness between an ECU and sensors, or between ECUs.
Result: The OPEN display does not change.
HINT:
The connector and/or wire harness will be in momentary interruption (open circuit) if the display fluctuates. Repair or replace the connector and/or wire harness as one of them is faulty.