Toyota Toyota Celica 94-95 & Corolla 93-95 Trouble Code Info

Toyota

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

Self-Diagnosis – Normal Mode
  • Switch ignition ON. Do NOT start engine.
  • Check MIL illuminates
  • Switch ignition OFF
  • Corolla – jump DLC terminals TE1 and E1 with a short lead 1
  • Celica – 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
Self-Diagnosis – Test Mode
  • Carry out preparatory conditions
  • Corolla – jump DLC terminals TE2 and E1 with a short lead 1
  • Celica – jump DLC terminals TE2 and E1 with a short lead 2
  • Switch ignition ON. Do NOT start engine
  • Check MIL is flashing to confirm test mode is operating
  • NOTE: Test mode will not be activated if the DLC terminals are connected after the ignition switch is turned ON.
  • Start the engine
  • Drive vehicle over 10 mph to simulate possible fault conditions
  • Stop vehicle
  • Jump DLC terminals TE1 and E1 with a short lead 1 or 2
  • Count MIL flashes and compare with trouble code table below
  • Switch ignition OFF
  • Remove jump leads
Corollla 94-95 Checking Codes Celica 94-95 Checking Codes

Clearing Trouble Codes

  • Ensure ignition switched OFF
  • Corolla – remove EFI fuse (15A) from underhood fusebox¬†5
  • Celica – 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
Corolla 94-95 Erasing Codes   Celica 94-95 Erasing Codes  

 Trouble Codes

 
94-95 Celica 1.8L Engine Code: 7A-FE
94-95 Celica 2.2L Engine Code: 5S-FE
93-95 Corolla 1.6L Engine Code: 4A-FE
93-95 Celica 1.8L Engine Code: 7A-FE
Trouble code Fault location Probable cause
12 Engine speed (RPM) sensor -circuit Wiring, RPM sensor, ECM
13 Engine speed (RPM) sensor -above 1500 rpm Wiring, RPM sensor, ECM
14 Ignition reference signal -no signal Wiring, ignition module, ECM
16 Transmission control signal -malfunction EGM
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, lAT sensor, ECM
25 Mixture control -continuously lean Wiring, injector, H02S, intake/fuel ignition system, valve timing, ECM
26 Mixture control -continuously rich Wiring, injector, intake/fuel system, valve timing, ECM
27 Heated oxygen sensor (H02S)-rear-circuit Wiring, H02S, 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, instrument c/uster, ECM
43 Starter signal -circuit Wiring, ignition switch, engine control relay, 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/neutra! 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 solenoid, ECM