BEFORE BLACK

Code	Circuit	1981	1982	1983
12	No Distributor Reference Pulse (normal)	X	X	X
13	Open Oxygen Sensor Circuit	X	X	X
14	Shorted Coolant Sensor Circuit	X	X	X
15	Open Coolant Sensor Circuit	X	X	X
21	Throttle Position Sensor High	X	X	X
22	Throttle Position Sensor Low		X
23	M/C Solenoid Open or Grounded	X	X	X
24	Vehicle Speed Sensor	X	X	X
32	Baro Sensor	X	X	X
33	MAP Sensor		X
34	MAP Sensor Circuit	X	X	X
35	Shorted Idle Speed Control Circuit	X	X	X
41	No Distributor Reference Signal		X	X
42	Electronic Spark Timing	X	X	X
43	Electronic Spark Control		X	X
44	Lean Exhaust Condition	X	X	X
44&45	At Same Time; Faulty Oxygen Sensor	X	X
45	Rich Exhaust Condition	X	X	X
51	Faulty PROM	X	X	X
52&53	At Same Time; Faulty ECM	X
54	M/C Solenoid Shorted	X	X	X
55	Faulty Oxygen Sensor	X	X	X