Code No.B1731 Engine-ECU communication timeout
caution |
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DIAGNOSTIC FUNCTION
JUDGMENT CRITERIA
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of KOS-ECU
- Malfunction of engine-ECU
- Damaged wiring harness and connectors
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Q.
Is the check result normal?
![](/outlander-2008/button/03btn001.png)
![](/outlander-2008/button/03btn002.png)
![](/outlander-2008/button/03btn007.png)
STEP 2. M.U.T.-III other system diagnosis code
Q.
Is the diagnosis code set?
![](/outlander-2008/button/03btn001.png)
![](/outlander-2008/button/03btn007.png)
![](/outlander-2008/button/03btn007.png)
![](/outlander-2008/button/03btn007.png)
![](/outlander-2008/button/03btn007.png)
![](/outlander-2008/button/03btn002.png)
STEP 3. Check whether the diagnosis code is reset.
(1)Turn the ignition switch from the LOCK (OFF) position to the ON position. |
(2)Check if the diagnosis code is set. |
Q.
Is the diagnosis code set?
![](/outlander-2008/button/03btn001.png)
![](/outlander-2008/button/03btn007.png)
![](/outlander-2008/button/03btn002.png)
![](/outlander-2008/button/03btn007.png)
STEP 4. Check whether the diagnosis code is reset.
(1)Turn the ignition switch from the LOCK (OFF) position to the ON position. |
(2)Check if the diagnosis code is set. |
Q.
Is the diagnosis code set?
![](/outlander-2008/button/03btn001.png)
![](/outlander-2008/button/03btn007.png)
![](/outlander-2008/button/03btn002.png)