Toyota OBD/OBD2 Codes >> 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 codeFault locationProbable cause
12Engine speed (RPM) sensor -circuitWiring, RPM sensor, ECM
13Engine speed (RPM) sensor -above 1000 rpmWiring, RPM sensor, ECM
14Ignition reference signal -no signalWiring, ignition module, ECM
16Transmission control signal -malfunctionECM
21Heated oxygen sensor (H02S)-front-circuitWiring, H02S, ECM
22Engine coolant temperature (ECT) sensor circuitWiring, ECT sensor, ECM
24lntake air temperature (lAT) sensor -circuitWiring, IAT sensor, ECM
25Mixture control -continuously leanWiring, injector, H02S, ECT/MAP sensor, intake fuel/ignition/EGR system, ECM
26Mixture control -continuously richWiring, injector, fuel system, H02S, ECT/MAP sensor, ECM
27Heated oxygen sensor (H02S)-rear -circuitWiring, H02S, ECM
31Manifold absolute pressure (MAP) sensor -circuitWiring, MAP sensor, ECM
33ldle air control (lAC) valve-circuitWiring, IAC valve, ECM
41Throttle position (TP) sensor -circuitWiring, TP sensor, ECM
42Vehicle speed sensor (VSS) circuitWiring, VSS, ECM
43Starter signal -circuitWiring, ignition switch, engine control retay, ECM
51Switch signal A/C switch ON during diagnosisWiring, A/C switch, A/C amplifier, ECM
51Switch signal -closed throttle position (CTP) switch OFF during diagnosisWiring, CTP switch, ECM
51Switch signal -park/neutral position (PNP) switch not in P or N during diagnosisWiring, PNP switch, ECM
52Knock sensor (KS) -circuitWiring, KS, ECM
71Exhaust gas recirculation (EGR) system malfunctionHose 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.