Engine Control System

Check Engine Light blinks eight times:

A problem in the Top Dead Center (TDC) Sensor Circuit.

DTC 8: Top Dead Center (TDC) Sensor (Part 1 Of 2):

DTC 8: Top Dead Center (TDC) Sensor (Part 2 Of 2):

The sensor consists of a pair of rotors, TDC and CYL, and a pickup for each rotor. Since the rotors are coupled to the camshaft, they turn together as a unit as the camshaft rotates. The CYP sensor detects the position of the No. 1 cylinder as the base for the Sequential injection whereas the TDC sensor serves to determine the injection timing for each cylinder. The TDC sensor also supplies the RPM signal to the ECU.

The Check Engine warning light may come on, indicating a system problem, when, in fact, there is a poor or intermittent electrical connection. First, check the electrical connections, clean or repair connections if necessary.