Code 26 what's involved?
Melting Slicks
Joined: Aug 2001
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Re: Code 26 what's involved? (Raysur)
Code 26 refers to quad driver module #1. There's a variety of EGR and other emissions stuff that it controls. I'd reset it, and see if it reappears. It's kinda rare that a relay goes bad, but it does happen. Any coil to a relay that has than 25 ohms may be suspect. Rather than probing wires.. sometimes it's easier to start plugging and playing. Know anyone that has the same year car? :steering:
Safety Car
Joined: Feb 2002
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From: Sun City West Az
Re: Code 26 what's involved? (EricVonHa)
Code 26 is the quad driver for the canister purge solenoid, EGR sol. AIR motor relay and the EVS sol.(electric vavle switching) . If all these are working then it may be a bad ECM.
Thread Starter
Safety Car
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From: Southern California
Re: Code 26 what's involved? (ittlfly)
Code 26 is the quad driver for the canister purge solenoid, EGR sol. AIR motor relay and the EVS sol.(electric vavle switching) . If all these are working then it may be a bad ECM.
Safety Car
Joined: Feb 2002
Posts: 4,212
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From: Sun City West Az
Re: Code 26 what's involved? (Raysur)
Code 26 is the quad driver for the canister purge solenoid, EGR sol. AIR motor relay and the EVS sol.(electric vavle switching) . If all these are working then it may be a bad ECM.
How do I check these and where are they?
How do I check these and where are they?
[Modified by ittlfly, 6:59 PM 12/22/2002]
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Safety Car
Joined: Jun 1999
Posts: 3,641
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From: Southern California
Re: Code 26 what's involved? (HiRiser)
When I use a paperclip to check the codes the fans and the air pump turn on. It only gives off a 26. But when I start the car the air pump won't turn on. :confused:
[Modified by Raysur, 4:31 PM 12/23/2002]
[Modified by Raysur, 4:31 PM 12/23/2002]
Safety Car
Joined: Feb 2002
Posts: 4,212
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From: Sun City West Az
Re: Code 26 what's involved? (Raysur)
Well if the pump runs in the diagnostic mode then the pump, its relay and 25 amp fuse is ok. My guess is the ECM is not supplying the ground for the pump. Can you borrow an ECM and see if it cures the problem?
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Safety Car
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From: Southern California
Re: Code 26 what's involved? (Raysur)
Nevermind what I said about the air pump not turning on when the car is on. It does turn on. Then after a minute it shuts off and throws the code.
Safety Car
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From: Sun City West Az
Re: Code 26 what's involved? (Raysur)
Does the AIR pump start up when the engine is stone cold or within 1 minute of start up? If so, The ECM is supplying a ground and all is well. Then If the pump turns off before the system goes closed loop, then the ECM has a problem as the quad driver is sensing a unexpected voltage change and throwing the code. There are several requirments that must be met before the system goes "closed". If your system is trying to go from open to closed loop in 1 minute from a stone cold engine, somthing isn't quite right. Do you have access to a Autoxray or other scanner? That way you could monitor the ECM for open/closed loop and see if the ECM still continues to show "open loop" when the AIR shuts off. The AIR should turn off when the system goes closed loop. My $ is on a bad ECM.
Sorry for being so long.
Sorry for being so long.
Safety Car
Joined: Feb 2002
Posts: 4,212
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From: Sun City West Az
Re: Code 26 what's involved? (Raysur)
[QUOTE]It only comes on when it's stone cold. :yesnod:
That's when it should operate. It should operate until the system goes closed. I strongly suggest you get a Autoxray ($150 @ Kragen/Schucks) or something comperable so you can monitor your system in real time. I have a hunch that the scanner will show you in open loop when your AIR shuts off and you get the code at that same moment. :seeya
[Modified by ittlfly, 7:31 AM 12/24/2002]
That's when it should operate. It should operate until the system goes closed. I strongly suggest you get a Autoxray ($150 @ Kragen/Schucks) or something comperable so you can monitor your system in real time. I have a hunch that the scanner will show you in open loop when your AIR shuts off and you get the code at that same moment. :seeya
[Modified by ittlfly, 7:31 AM 12/24/2002]
