Hola compadres.
I read the through the entire "ENG: Diagnose a Check Engine Light and S/D4 errors" thread & also did a search but haven't found anybody else asking this question so...
My 93 has a CEL light and a constantly flashing D4 light when I drive. CEL is on solid, D4 flashing no particular sequence, just on/off forever.
I jumped the blue connector & read the ECU - it's giving me a 6 (ECT - water temperature sensor) & 15 (Ignition output signal). So that's fine, I'll run those down.
But...the D4 is not giving me any error code - it stays off. I thought that when the diagnostic connector was jumped, the D4 light itself was supposed to flash a code from the TCU. Any advice on what to check next?
I read the through the entire "ENG: Diagnose a Check Engine Light and S/D4 errors" thread & also did a search but haven't found anybody else asking this question so...
My 93 has a CEL light and a constantly flashing D4 light when I drive. CEL is on solid, D4 flashing no particular sequence, just on/off forever.
I jumped the blue connector & read the ECU - it's giving me a 6 (ECT - water temperature sensor) & 15 (Ignition output signal). So that's fine, I'll run those down.
But...the D4 is not giving me any error code - it stays off. I thought that when the diagnostic connector was jumped, the D4 light itself was supposed to flash a code from the TCU. Any advice on what to check next?
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