Check engine light flashing ?
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Check engine light flashing ?
Lately my CEL has been occassionaly flashing while trk. is at idle, had a friend to scan it today & code # 221 showed up, I think this is for the throttle switch, correct ? Is it much trouble to change out & is it very expensive ? Thanks
Hotshot
Joined: Oct 2003
Posts: 17,799
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From: Ashland City, TN
P0221 Throttle Switch B Circuit Performance
No clue other than that.
I've read places where you have to change the assembly, and places where you can replace the parts.
I really have no idea.
There are 2 switches on the pedal, the throttle control Pot, and the IVS, Idle Validation Switch.
The IVS could be hiccuping.
With the CEL on, will the truck go?
Could just be a bad reading from the TPS.
No clue other than that.
I've read places where you have to change the assembly, and places where you can replace the parts.
I really have no idea.
There are 2 switches on the pedal, the throttle control Pot, and the IVS, Idle Validation Switch.
The IVS could be hiccuping.
With the CEL on, will the truck go?
Could just be a bad reading from the TPS.
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 103
From: Ashland City, TN
you'd have to look at the assembly.
It will pull directly out of the truck.
the IVS is only clicked on when the pedal is not being pressed, and it will click the idle switch on.
When you press the pedal, you should see which one turns just like a regular car TPS
You can test that with an ohm meter holding the leads and checking resistance while somebody, or your forearm, presses the pedal slowly, just looking for jumps in the readings.
Thats all the info I have on it.
They dont often go bad, not something we really deal with a lot around here.
Look in the parts list on the stickies, there might be a part number for the TPS in there.
It will pull directly out of the truck.
the IVS is only clicked on when the pedal is not being pressed, and it will click the idle switch on.
When you press the pedal, you should see which one turns just like a regular car TPS
You can test that with an ohm meter holding the leads and checking resistance while somebody, or your forearm, presses the pedal slowly, just looking for jumps in the readings.
Thats all the info I have on it.
They dont often go bad, not something we really deal with a lot around here.
Look in the parts list on the stickies, there might be a part number for the TPS in there.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
The IVS is the one with the red button
You can test the Pedal . THe IVS is an on or off switch ,, You need to put a voltmeter across the GY/W and the GY/R wires on the connector to the TPS. With the key on, watch the voltage across the range of the throttle to see if there is any flat spots. You should see no less than .37 volts at idle position and no more than 4.5 volts at full throttle. The the third wire, (BRN/W), is the ref. voltage and should be 5 volts all the time.
You can test the Pedal . THe IVS is an on or off switch ,, You need to put a voltmeter across the GY/W and the GY/R wires on the connector to the TPS. With the key on, watch the voltage across the range of the throttle to see if there is any flat spots. You should see no less than .37 volts at idle position and no more than 4.5 volts at full throttle. The the third wire, (BRN/W), is the ref. voltage and should be 5 volts all the time.
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Tinkered with it a little today, unplugged the one with the red button & used canned air to blow out & when I plugged it beak up I had no throttle at all & cel was on steady, cut truck off, waited a few mins, cranked trk up & it had throttle but I had to move pedal more than usual. Think the IVS is bad ?
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