DESCRIPTION
When the CAN bus main lines are normal (no open, short to ground, short to +B or short between lines) and there is an ECU or sensor on the "Communication Bus Check" screen that is indicated as not communicating or whose connection status on the "Communication Bus Check" screen changes intermittently, an open in one of the wires of a CAN bus branch line is suspected.
HINT:
If there is an ECU or sensor whose connection status changes intermittently while checking the "Communication Bus Check" screen, there may be an open circuit in one of the wires of a branch line of an ECU or sensor in the bus. If an open occurs in one of the wires of a CAN branch line, it may interfere with the communication of other ECUs or sensors resulting in an incorrect state being displayed.
Symptom |
Trouble Area |
---|---|
There is an ECU or sensor that is indicated as not communicating on the "Communication Bus Check" screen or whose connection status on the "Communication Bus Check" screen changes intermittently. |
One side of CAN branch line is open, or output signals are incomplete.
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CAUTION / NOTICE / HINT
NOTICE:
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DTC check procedure: Turn the ignition switch to ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch), turn the LDA main switch on and wait for approximately 52 seconds or more.
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PROCEDURE
1. |
CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH LINE |
(a) Based on the vehicle equipment and specifications, confirm the systems that use CAN communication.
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(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Using the Techstream, perform "CAN Bus Check".
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(f) Observe the screen for approximately 2 minutes to check for ECUs and sensors that are displayed as not communicating.
(g) Perform the inspection as specified in the Problem Symptoms Table for the ECUs or sensors that are not communicating.
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GO TO CORRESPONDING COMMUNICATION STOP MODE
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Toyota CH-R Service Manual > Power Window Control System: Front Passenger Side Power Window Auto Up / Down Function does not Operate with
Front Passenger Side Power Window Switch
DESCRIPTION
If the manual up and down functions operate normally but the auto up and down
functions do not, the power window control system may be in fail-safe mode.
If power window initialization has not been performed, the auto up and down functions
will not operate.
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WIRING ...
Toyota CH-R Service Manual > Lin Communication System: Front Passenger Side Door ECU Communication Stop (B2322)
DESCRIPTION
This DTC is stored when LIN communication between the power window regulator
motor assembly (for front passenger door) and main body ECU (multiplex network body
ECU) stops for 10 seconds or more.
DTC No.
Detection Item
DTC Detection Condition
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