Code 12, 13 - Rpm Signal

Code 12 is caused by loss of "G2", "G1", or "NE" signal (3S-GTE), or no "G" or "NE" signal (all others), from distributor to ECU for at least 2 seconds after starter signal is received at ECU. Check distributor and ignition system components. See I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section. Ensure starter signal exists at ECU. See CELICA TEST NO. 10 OR CODE 43.

Code 13 is caused by loss of "NE" signal from distributor to ECU when engine RPM exceeds 1000-1500 RPM. Check for open or short in distributor wiring to ECU. Check distributor and ignition system components. See I-SYS/COMP TESTS article.

Code 12 is caused by loss of signal "G2", "G1", or "NE" (3S-GTE) or "G" or "NE" (all others) 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. 10 OR CODE 43.

Code 13 is caused by loss of "NE" signal from distributor to ECU when engine RPM exceeds 1000 RPM.