carlfino Posted September 24, 2006 Share Posted September 24, 2006 I have 2 technical questions... 1. I am getting a fault code 51 ("Switch Condition") consistently after clearing the codes. The idle increases when I engage the AC, so that works. The starter will not engage when in a gear other than P or N, so I conclude that works as well. In checking the TPS the manual calls for a 5V signal being sent to the TPS via the IDL and E2 conductors. I am getting 12V, not 5V. Testing of the TPS shows that it does provide a resistance called for when at idle (2.3k ohms or less) and the resistance opens up just as the throttle opens beyond idle. Should the voltage that the ECU is sending the TPS be 12V or 5V? Do I have a bad ECU? And does error code 51 evaluate any other switches other than Neutral start, A/C and TPS switches? 2. I am attempting to set the ignition timing by placing a jumper wire between terminals E1 and TE1. It shows about 10 BTDC for base timing, which is what the manual calls for - no problem there. However, the manual also indicates that the "Advance Timing" should be 13 - 27 BTDC, which occurs when the jumper wire is removed. When I remove the jumper wire there is absolutely no difference in the timing or the sound/rpm of the engine. Timing stays at 10 BTDC. When I put the jumper wire in the engine idle increases to about 1500 rpm for about 2 seconds then goes back to base idle (700 rpm). Is something wrong? Shouldn't the timing advance when I remove the jumper wire? Also, could this be related to question #1 above? Thanks to all the technogeeks that respond. Carl... Quote Link to comment Share on other sites More sharing options...
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