| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001XNN8 |
| Model Year Start: 2022 | Model: Avalon | Prod Date Range: [08/2021 - ] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): CHECK FOR INTERMITTENT PROBLEMS; 2022 MY Avalon [08/2021 - ] | ||
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 Data List function of the Techstream.
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / Brake/EPB / Data List.
(f) Check the data related to power supply fluctuations.
HINT:
A momentary interruption (open circuit) cannot be detected for 3 seconds after the engine switch is turned on (IG) (initial check).
Chassis > Brake/EPB > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
EFI Communication Open |
EFI communication open detection |
Normal / Under intermittent |
Normal: Normal Under intermittent: Momentary interruption |
Related DTC: U010087 |
|
Yaw Rate Open |
Yaw rate sensor (airbag ECU assembly) open detection |
Normal / Under intermittent |
Normal: Normal Under intermittent: Momentary interruption |
Related DTC: U012587 |
|
Deceleration Open |
Acceleration sensor (airbag ECU assembly) open detection |
Normal / Under intermittent |
Normal: Normal Under intermittent: Momentary interruption |
Related DTC: U012587 |
|
Steering Open |
Steering angle sensor open detection |
Normal / Under intermittent |
Normal: Normal Under intermittent: Momentary interruption |
Related DTC: U012687 |
(g) Push the line graph button to display the line graph.
(h) Check for intermittent shorts, etc.
OK:
Normal is displayed.
HINT:
If "Under intermittent" remains displayed on the Techstream, measure the resistance between the skid control ECU (brake actuator assembly) and the each sensor or ECM.
(i) 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.
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