TOYOTA MR2 OBD codes

 

Specification

Model Type

Engine Type

Model Year

Detection Mode

JAPAN

SW20

3S-GTE

10/1993 -

NORMAL

 

CODE

DIAGNOSIS

DETECTION

AREA

1

NORMAL

'Check Engine' warning light will flash continously.

NIL

12

RPM signal 1

[G1, G2, Ne]
When no RPM signal (G, Ne) to the ECU after or while cranking for more than 2 seconds.
[G-]
When more than 6 G1 AND G2 signal was input within 2 pulse of G1 computer signal.

* Wirings and connectors (crankshaft position & starter signal systems)
* Distributor
* ECU

13

RPM signal 2

[Ne]
When no RPM signal (Ne) to the ECU with engine speed above 1000 rpm.

* Wirings and connectors (crankshaft position signal systems)
* Distributor
* ECU

14

Ignition signal

[IGf, IGt]
When no IGf signals to the ECU (constantly 6 times).

* Wirings and connectors (igniter +B, IGf, IGt) & (Ignition coil +B)
* Igniter
* ignition coil
* ECU

21

O2 sensor signal

[Ox]
When the O2 sensor voltage crosses the 0.45V line and is leaning towards either 0.35V (lean) or 0.70V (rich) side for over 60 seconds while the speed is below 100km/h with engine speed of above 1500 rpm.
[HT] (O2 sensor heater)
When no response from the heater or low output level (below 1.5) for over 0.5 seconds.

* O2 sensor
* Fuel system (injector, fuel pump)
* Ignition system (ignitor, plugs)
* Intake air system (air flow meter)
* ECU

22

Coolant temperature signal

[THW, E2]
Whenever a short circuit or a circuit detachment in the coolant temperature sensor is detected for over 0.5 seconds.

* Wirings and connectors (coolant temp systems)
* Coolant temp sensor
* ECU

24

Intake air temperature signal

[THA, E2]
Whenever a short circuit or a circuit detachment in the intake air temperature sensor is detected for over 0.5 seconds.

* Wirings and connectors (intake air systems)
* Intake air temp sensor
* ECU

25

Lean error

[Ox]
When no 'rich' signals were sent by the O2 sensor for over 90 seconds while the car is travelling at speeds under 100km/h with engine speed is above 1500 rpm with the coolant temprature above 70 centigrade.

* Wirings and connectors (O2 sensor)
* Fuel system (injector, fuel pressure)
* Air flow meter
* Coolant temp sensor

31

Turbo pressure sensor signal

[PIM, VC E2]
Whenever a short circuit or a circuit detachment in the turbo pressure sensor is detected for over 0.5 seconds.

* Wirings and connectors (turbo pressure sensor systems)
* Turbo pressure sensor
* ECU

34

Boost pressure

[PIM, VC, E2]
Whenever a fuel cut had occurred as a result of abnormal boost pressure for over 0.1 seconds.

* Wirings and connectors (turbo pressure sensor systems)
* Turbo pressure sensor
* ECU

41

Primary throttle position sensor

[VTA1, VC, IDL1, E2]
Whenever a short circuit or a circuit detachment in the primary throttle position sensor is detected for over 0.5 seconds.

* Wirings and connectors (Primary throttle position systems)
* Primary throttle position sensor
* ECU

42

Speed sensor signal

[SPD]
When the speed sensor sent 0km/h signal to the ECU for more than 8 seconds while the engine speed is between 2000 rpm and 4000 rpm.

* Wirings and connectors (speed sensor systems)
* Speed sensor
* Air flow meter
* ECU

47

Secondary throttle position sensor

[VTA1, VC, IDL2, E2]
Whenever a short circuit or a circuit detachment in the secondary throttle position sensor is detected for over 0.5 seconds.

* Wirings and connectors (secondary throttle position systems)
* Secondary throttle position sensor
* ECU

52

Knock sensor signal

[KNK]
When a short circuit or a circuit detachment was detected in the knock sensor or its connectors while the engine speed is between 2750 rpm and 7200 rpm.

* Wirings and connectors (knock sensor systems)
* Knock sensor
* ECU

53

Knock management

When the knock management part of the ECU fails while the engine speed is between 700 rpm and 7200 rpm.

* ECU