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The vehicle has a no crank condition and there is no communication with any modules. There are 5 steps listed to test the CAN network resistance at the Data Link Connector with the key off, check for high resistance that would indicate a module is not on the network, check the resistance from modules to the connector, and isolate modules by unplugging them to find what is shutting down communication.

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Juan Carlos Díaz Cardozo
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101 views7 pages

Red Can PDF

The vehicle has a no crank condition and there is no communication with any modules. There are 5 steps listed to test the CAN network resistance at the Data Link Connector with the key off, check for high resistance that would indicate a module is not on the network, check the resistance from modules to the connector, and isolate modules by unplugging them to find what is shutting down communication.

Uploaded by

Juan Carlos Díaz Cardozo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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2016 Transit-250 3.

2
2016 Transit-250 3.5
2016 Transit-250 3.7
2016 Transit-350 3.2
2016 Transit-350 3.5
2016 Transit-350 3.7
2016 Transit-350 HD 3.2
2016 Transit-350 HD 3.5
2016 Transit-350 HD 3.7

There is no communication with any modules and has a no crank.

Tests/Procedures:

1. Access the Data Link Connector (DLC) and test the CAN network resistance with the
key off. See related documents.

2. If the resistance is 120 ohms, that means either the Powertrain Control Module (PCM)
or the Body Control module (BCM) are not on the network. Unplug the PCM, recheck
the resistance. If there is still 120 ohms, you know it is the PCM that is not on the
network, check all connectors on the network that go to the PCM. If the resistance drops
when the PCM is unplugged, then you know the (BCM) is not on the network, check the
connectors going to the BCM. When the PCM and the BCM are both on the network,
there should be 60 ohms.

3. If the PCM or the BCM are not on the network, then check the resistance of the wiring
from the BCM or PCM to the data link connector. This should be less than 5 ohms. If not
then repair the circuit.

4. If you find very low resistance at all times, the network wires are likely pinched or
one of the modules is shutting down the network. Unplug one module at a time until the
communication returns.

5. If you are getting an open circuit, it is likely that one of the connectors is completely
unplugged on the network, or there is wiring damage.

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