Trouble Code Id Chart

1983 PROGRAMMED ECM TROUBLE CODES

Code	Circuit Affected
12	No tach signal
13	Oxygen sensor not ready
14	Shorted coolant sensor circuit
15	Open coolant sensor circuit
16	Generator voltage out of range
18	Open crank signal circuit
19	Shorted fuel pump circuit
20	Open fuel pump circuit
21	Shorted TPS circuit
22	Open TPS circuit
23	EST/By-pass circuit problem
24	Speed sensor circuit
26	Shorted throttle switch circuit
27	Open throttle switch circuit
28	Open 4th gear circuit
29	Shorted 4th gear circuit
30	ISC circuit
31	Shorted MAP sensor circuit
32	Open MAP sensor circuit
33	MAP/BARO sensor correlation
34	MAP signal too high
35	Shorted BARO sensor circuit
36	Open BARO sensor circuit
37	Shorted MAT sensor circuit
38	Open MAT sensor circuit
39	TCC engagement
44	Lean exhaust signal
45	Rich exhaust signal
51	PROM error
52	ECM memory reset indicator
60	Transmission not in "DRIVE"
63	Car speed exceeds maximum limit
64	Car exceeds maximum acceleration limit
65	Coolant temperature exceeds maximum limit
66	Engine RPM exceeds maximum limit
67	Shorted "SET" or "RESUME" circuit
.7.0	System ready for further tests
.7.1	Cruise control brake circuit test
.7.2	Throttle switch circuit test
.7.3	Drive (ADL) circuit test
.7.4	Reverse circuit test
.7.5	Cruise on/off circuit test
.7.6	Set/coast circuit test
.7.7	Resume/acceleration circuit test
.7.8	Instant/average circuit test
.7.9	Reset circuit test
.8.0	A/C clutch circuit test
1.8.8	Display check
.9.0.	System ready to display engine data
.9.5	System ready for output cycling or in fixed spark mode
.9.6	Output cycling
.0.0	All diagnostics complete

NOTE: After diagnosing trouble codes; switch tests, engine data displays and output cycling tests can be used to isolate "intermittent failures". DO NOT perform any adjustment or repairs on any component until malfunction has been positively located.