How to Troubleshoot a VTEC Cam Solenoid
- 1). Observe signs of an improperly connected VTEC cam solenoid. A car may perform sluggish, like it's not getting enough power, if there's a disruption in the connection between the VTEC solenoid and ECU.
- 2). Ensure a proper connection between the VTEC solenoid and ECU "A." ECU "A" is located to the left of ECU "B" and ECU "C." Two solenoid wires should connect to ECU "A."
- 3). Verify correct wiring between the VTEC solenoid and ECU "A." The yellow solenoid wire must connect to connector "A17" on ECU "A." The red solenoid wire must connect to connector "A8" on ECU "A."
- 4). Drive the vehicle. If shifts do not occur at proper speeds, or the vehicle continues to perform in a sluggish manner, this may be an indication of a problem with the solenoid.
- 5). Bring the vehicle to a mechanic for diagnostic testing. The mechanic will test solenoid valves and their electrical circuitry, as well as terminal voltage and gear position. These tests can help the mechanic identify and resolve problems related to a sticking solenoid, an open circuit to the solenoid or a faulty solenoid.