Re: 1986 Toyota Cressida Check Engine light will not flash

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Posted to Technical Tips Forum on 9/7/2000

Hi Bill,

Toyotas need a few things in order for the PCM to display codes.

1) A/C off.

2) Park or Neutral.

3) TPS idle contacts closed (continuity)

Add any of the above and it may not work, ESPECIALLY the TPS, which is the singlemost common cause of n... Login to read more.