Automatic Transmission CAN Communication Circuit
Table of contents
P1718 SUBARU Possible Causes
- Faulty Transmission Control Module (TCM)
- Transmission Control Module harness is open or shorted
- Transmission Control Module circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How do I fix code P1718 SUBARU?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1718 SUBARU code
The cost of diagnosing the P1718 SUBARU code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1718 SUBARU Description
The Controller Area Network (CAN) bus is used in vehicles as a form of data transfer between control units. On a CAN Bus network, each control unit is capable of transmitting and receiving information. Information packets or messages carry a certain priority; messages with a higher priority are transmitted before lower priority messages. This ensures that safety-critical data is not held up by less important messages.
Vehicle wiring and components can be reduced with the addition of CAN Bus because signals required by multiple control units are only wired to a single control unit. The signal is then put on the network as a data message for all control units to use. Additional features can be easily fitted to vehicles when CAN Bus is used, such as priority lighting, automatic wipers, etc.
The Diagnostic Trouble Code (DTC) will set when CAN communication with the Transmission Control Module (TCM) cannot be established
