Subject	Code 21 is calling it a PRIMARY wiring problem
Posted by	Cjw3 on February 27, 2014 at 8:23 PM
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In Reply To	Code 21....out of ideas. posted by The Sixth on February 24, 2014 at 10:06 PM
Message	And you verified that you do not have spark at the coil.. For the ECU to 'See' the spark.. id have to be sensing the current coming back the PTU line that it grounds at the ECU from the PTU.. So it's a PTU +12 problem, or it's a PTU Problem... or it's a wiring problem from the PTU to the ECU.. or it's an ECU problem.. Toss in another ECU ( any Year any trans, NA or TT ) and see if you can get the Coil to spark to the Plenum during cranking.. From what you have checked, it sounds like the ECU Driver for the PTU pack, might be toast.. But the Replacement ECU will be the final check.. Cj
Follow Ups	Code 21....out of ideas. - The Sixth 22:06:17 02/24/14 Try making sure connector to ECU is tight. - dvice 00:41:46 02/25/14 Re: Thanks....done a few times already. (n/m) - The Sixth 10:12:18 02/25/14 You did not mention anything about Injectors - Cjw3 21:50:57 02/25/14 I got a used new style complete drop in from Woody... - The Sixth 09:47:28 02/26/14 Injectors are 100% deff good and working :) - Woody75 (Denver) 16:03:41 02/26/14 Didn't even need them, since I used a 95 harness... - The Sixth 16:17:09 02/26/14 Code 21 is calling it a PRIMARY wiring problem - Cjw3 20:23:24 02/27/14 Thanks for the input... - The Sixth 09:26:23 02/28/14 Where is the ECU that was in the Chassis?.. (n/m) - Cjw3 21:24:19 02/28/14 I've just got the single ECU... - The Sixth 10:54:29 03/03/14
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