Toyota 91-95 MR2 5S-FE or 92-95 Paseo 5E-FE

Preparatory Conditions

Battery voltage 11 Volt minimum
Closed throttle position (CTP) switch full closed
Transmission in neutral position
All auxiliary equipment, including air conditioning, switched OFF
Engine at normal operating temperature

Accessing Trouble Codes

Switch ignition ON. Do NOT start engine.
Check MIL illuminates
Switch ignition OFF
Paseo – Jump DLC terminals TE1 and E1 with a short lead 1
MR2 – Jump DLC terminals TE1 and E1 with a short lead 2
Switch ignition ON
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

Clearing Trouble Codes

Ensure ignition switched OFF
Paseo – remove EFI fuse (15A) from underhood fusebox 5
MR2 – remove EFI fuse (15A) from underhood fusebox 6
Wait 30 seconds
Reinstall fuse
Repeat accessing procedure to ensure no data remains in ECM fault memory

Trouble Codes

91-95 MR2 2.2L Engine Code: 5S-FE
92-95 Paseo 1.5L Engine Code: 5E-FE
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, ECM
16	Transmission control signal -malfunction	ECM
21	Heated oxygen sensor (H02S)-front-circuit	Wiring, H02S, ECM
22	Engine coolant temperature (ECT) sensor circuit	Wiring, ECT sensor, ECM
24	lntake air temperature (lAT) sensor -circuit	Wiring, IAT sensor, ECM
25	Mixture control -continuously lean	Wiring, injector, H02S, ECT/MAP sensor, intake fuel/ignition/EGR system, ECM
26	Mixture control -continuously rich	Wiring, injector, fuel system, H02S, ECT/MAP sensor, ECM
27	Heated oxygen sensor (H02S)-rear -circuit	Wiring, H02S, ECM
31	Manifold absolute pressure (MAP) sensor -circuit	Wiring, MAP sensor, ECM
33	ldle air control (lAC) valve-circuit	Wiring, IAC valve, 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, engine control retay, 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
52	Knock sensor (KS) -circuit	Wiring, KS, ECM
71	Exhaust gas recirculation (EGR) system malfunction	Hose leak/blockage, wiring, EGRT sensor, EGR sotenoid, ECM

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Fredrick Mwape Kaunda

2 years ago

Thanks so much, you have helped me a lot. It very much beneficial to have people like you guys in the society. God bless you.