Re: how to diagnose without a check engine light???
Tue, 08 November 2005 07:01
You can hook up a test lamp via the diagnostics box. On my 2JZ the "Malfunction Indicator Lamp" pin is labelled W, and I assume it's the same for other Toyota engines.
So, just connect one end of the test lamp to the W pin, and the other to a +12v source (eg the battery terminal) and watch the flashy goodness.