Toyota Venza: Open in One Side of CAN Branch Line
DESCRIPTION
If some ECUs and sensors are not displayed on the "CAN Bus Check" screen of the Techstream and some ECUs and sensors repeatedly appear and disappear from the screen when the CAN main bus wires are normal (there is no open, short, short to B+ or short to GND in the main bus wires), there may be an open circuit in either of the CAN branch wires.
HINT:
If some ECUs and sensors repeatedly appear and disappear from the "CAN Bus Check" screen, communication between the normal ECUs (sensors) and the Techstream may be affected by the incomplete signals that are output from the ECU that has an open circuit in either of its CAN branch wires. In this case, the CAN branch wires for the ECUs and sensors that repeatedly appear and disappear from the screen are normal and the ECU that is not displayed on the screen may be the main cause of the problem (this ECU may have an open circuit in either of its CAN branch wires).
|
Symptom |
Trouble Area |
|---|---|
|
2 or more ECUs and/or sensors do not appear on the Techstream "Communication Bus Check" screen. |
One side of CAN branch wire is open, or output signals are incomplete.
|
*1: for AWD
*2: w/ Smart key system
*3: w/o Smart key system
*4: for Navigation system
*5: for Audio and visual system
CAUTION / NOTICE / HINT
HINT:
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below will help determine the cause of the malfunction.
PROCEDURE
|
1. |
CHECK FOR OPEN IN ONE SIDE OF CAN NO. 1 BUS BRANCH WIRE |
(a) Confirm the systems (ECUs and sensors), which use CAN communication, equipped
on the vehicle (See page .gif)
).
(b) Using the Techstream, select and perform "CAN Bus Check" (See page
).
(c) Observe the screen for approximately 1 minute to check the ECUs and sensors that are not displayed on the screen and also those that repeatedly appear and disappear from the screen.
(d) Check that the ECUs and sensors, which are connected to the ECUs or sensors that are not displayed on the screen.
(e) Check that the ECUs and sensors, which repeatedly appeared and disappeared from the "CAN Bus Check" screen, are constantly displayed.
| NEXT | .gif) |
GO TO CORRESPONDING COMMUNICATION STOP MODE |
Check CAN Bus Line for Short to GND
DESCRIPTION
There may be a short circuit between the CAN bus main wire and GND when there
is no resistance between terminals 6 (CANH) and 4 (CG) or 14 (CANL) and 4 (CG) of
the DLC3.
S ...
Other materials about Toyota Venza:
Installation
INSTALLATION
PROCEDURE
1. INSTALL DISCHARGE HEADLIGHT BULB
HINT:
Use the same procedure for the RH side and LH side (See page
).
2. INSTALL LIGHT CONTROL ECU (for LH Side)
(a) Turn the socket of the light control ECU in the direction indicat ...
Headlight switch
The headlights can be operated manually or automatically.
Turning the end of the lever turns on the lights as follows.
Type A
The daytime running lights turn
on.
The headlights, parking lights, daytime running lights and so on turn on and
off auto ...
Vsc Off Switch
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable
is reconnected (See page ).
2. REMOVE FR ...
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