Code 12, 13 - RPM Signal

Code 12 is caused by loss of "NE" signal from distributor to ECU for at least 2 seconds after starter signal is received at ECU. Ensure starter signal exists at ECU. See TEST NO. 9 OR CODE 43. Code 13 is caused by loss of "NE" signal from distributor to ECU when engine RPM exceeds 1500 RPM.