Guest Posted June 21, 2002 Share Posted June 21, 2002 1990 running ok but 150 miles ago <BR>the service engine soon lite started<BR>comming on sometimes staying sometimes not<P>I'm getting the lite on most of the time<BR>when checking the codes to find the problem<BR>I Get E026c E026h<BR> and b552h ro26h<P>Please help with the code meaning and possible problem<P>Jim Stephens jastep@zapplink.com<p>[ 06-23-2002: Message edited by: ket ] Link to comment Share on other sites More sharing options...
padgett Posted June 21, 2002 Share Posted June 21, 2002 EO26 refers to the "Quad Driver" which controls the EGR, TCC solenoid, A/C relay, HI and LO fan relays and the cannister purge solenoid.<P>Check is by entering the diagnostics mode and verifying cycle of outputs 1,4,5,6,7,& 9. See pages 8d1-34 through 39 in the 88 FSM.<P>If occurring intermittantly, it is probably a bad wire or connector but need to know which one. Link to comment Share on other sites More sharing options...
padgett Posted June 21, 2002 Share Posted June 21, 2002 May have a home in Orlando but was on the Embarcadero this week. Link to comment Share on other sites More sharing options...
Guest Posted June 22, 2002 Share Posted June 22, 2002 Simplified "Check Engine Lamp" diagnostics:<P>A "c" sufffix after the code means <B>current</B>.<P>An "h" suffix after the code means <B>history</B>.<P>Your code E026 is both history and current. This is the code that is setting.<P>EO26 can set if any one of four malfunctions occur:<P>1) EGR coils open or wiring to EGR open.<BR>2) Torque Converter lockup solenod coil open or wiring to TCC open.<BR>3) Air Conditioning relay or AC high speed relay coil open or wiring to such open.<BR>4) Canister Purge or Low speed fan relay coil open or wiring to such open.<P>The computers on cars do not always check for a proper functioning sensor or operation but check to be sure the coil is connected by noting there is a resistance in the circuit and/or current flow to a particular coil.<P>Code EO24 checks for the coil of the relay, clutch, EGR, etc. for connections. Code EO24 does NOT check for proper operation of these devices.<P>There are six pages in the Service Manual on trouble shooting code EO26. The problem is an OPEN circuit.<P>Since Padgett lives in the same town as you do, perhaps he can help you. In any case, you will need a Service Manual.<P>Good luck. An ohmmeter, physical inspection of plugs and wiring and a good sense of logic will find your problem. Link to comment Share on other sites More sharing options...
Guest Posted June 23, 2002 Share Posted June 23, 2002 Fixed -- With Padgett help we traced it to a blown 15 amp fuse located in the fuse panel on the passanger side. There's a panel on both sides of the 90's & 91's.<P>Many thanks once again guys<BR>Jim Link to comment Share on other sites More sharing options...
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