Open-circuit, intermittent faults
An open-circuit in a cable will be indicated by the loss of a function (or functions).
Chafed and broken leads are common causes of faults.
Checks:
- Disconnect the connectors at both ends of the cable.
Check the cables visually according to Inspect terminals visually .
Connect an ohmmeter between the ends of the cable.
The ohmmeter should read approximately 0 Ω if there is no open-circuit in the cable.
Shake the cable lightly and pull on connectors during measurement to locate the damage.
If the reading is not correct. Replace the cable and / or continue according to Contact resistance and oxidation .
Always check the control module and control module box connectors to ensure that their pins and sockets are not bent or damaged, this may cause faults.
Check pins and terminals particularly carefully.