MR2 Check Engine
This second generation MR2 predates the OBD2 connector, a standard used to diagnose engine, transmission, and emissions problems quickly and easily. Instead, we have a flashing check engine light which needs some deciphering, followed by a lookup in the service manual.
Basically, you count flashes to arrive at fault code number. A short pause (~1.5 seconds) indicates the start of the next digit. A medium pause (~2.5 seconds) indicates start of the next fault code. And a long pause (~4.5 seconds) means the sequence has ended and will repeat.
The video below corresponds to the codes 41 and 51.
Using the the MR2 Check app and selecting the 3S-GTE engine:
|Diagnostic Port in Engine Bay
- Battery voltage needs to be 11V or more
- Throttle valve full closed (throttle position sensor IDL points closed)
- Transmission in neutral position
- Accessories switched OFF
- Engine at normal operating temperature