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:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If a trouble code is stored during the DTC check, inspect the trouble areas listed
for that code. For details of the code, refer to the "See page" below.
Certification ECU (Smart Key ECU Assembly)
...
Disposal
DISPOSAL
CAUTION / NOTICE / HINT
HINT:
The tire pressure warning valve and transmitter is powered by a lithium battery.
When disposing of the tire pressure warning valve and transmitter, remove the battery
and dispose of it correctly.
PROCEDURE
1. DIS ...
Vehicle Speed Sensor "A" (P0500)
DESCRIPTION
The speed sensors detect the wheel speed and send the appropriate signals to
the skid control ECU. The skid control ECU converts these wheel speed signals into
a 4-pulse signal and outputs it to the TCM via the combination meter. The TCM deter ...
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