Toyota Tercel 90-94 1.5L 3E-E OBD1 Codes

Accessing Trouble Codes

Switch ignition ON. Do NOT start engine.
Jump DLC terminals T and E1 with a short lead 1
Count MIL flashes and compare with trouble code table (below)
First flashes of .5 second duration indicate ‘tens’, after a 1.5 second pause, next flashes of .5 second duration indicate ‘units’
A 2.5 second pause occurs between codes
After a 4.5 second pause, trouble codes will be repeated
Switch ignition OFF
Remove jump lead

90-94 1.5L Engine Code: 3E-E
Trouble code	Fault location	Probable cause
12	Engine speed (RPM) sensor -circuit	Wiring, RPM sensor, ECM
13	Engine speed (RPM) sensor -above 1000 rpm	Wiring, RPM sensor, ECM
14	Ignition reference signal -no signal	Wiring, ignition module/coil, ECM
21	Heated oxygen sensor (H02S) -circuit	Wiring, H02S, ECM
22	Engine coolant temperature (ECT) sensor circuit	Wiring, ECT sensor, ECM
24	lntake air temperature (lAT) sensor-circuit	Wiring, lAT sensor, ECM
25	Mixture control -continuously lean	Wiring, injector, H02S, ECT/MAP sensor, intake/fuel/ignition system, ECM
26	Mixture control -continuously rich	Wiring, injector, fuel system, cold start injector, H02S, ECT/MAP sensor, ECM
31	Manifold absolute pressure (MAP) sensor circuit	Wiring, MAP sensor, ECM
41	Throttle position (TP) sensor-circuit	Wiring, TP sensor, ECM
42	Vehicle speed sensor (VSS) -circuit	Wiring, VSS, ECM
43	Starter signal -circuit	Wiring, ignition switch, ECM
51	Switch signal -A/C switch ON during diagnosis	Wiring, A/C switch, A/C amplifier, ECM
51	Switch signal -closed throttle position (CTP) switch OFF during diagnosis	Wiring, CTP switch, ECM
51	Switch signal -park/neutral position (PNP) switch not in P or N during diagnosis	Wiring, PNP switch, ECM
71	Exhaust gas recirculation (EGR) system -malfunction	Hose leak/blockage, wiring, EGRT sensor, EGR solenoid, ECM