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1992 Corolla diagnosis
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2 years 1 month ago - 2 years 1 month ago #55312
by jreardon
Replied by jreardon on topic 1992 Corolla diagnosis
www.scannerdanner.com/scannerdanner-prem...ntiometers-5-9-13-14
It's a TP switch, not a TP sensor.
Paul explains that once you're off idle, the computer see 0 volts turns to 12 volts (pull down switch input) and computer injects fuel like an accelerator pump in a carbureted engine to prevent tip in hesitation. Your reading of 12 , 0 and 12 volts means the computer thinks it's in part throttle and you don't get the extra shot of fuel.
This part's from identifix:
It's a TP switch, not a TP sensor.
Paul explains that once you're off idle, the computer see 0 volts turns to 12 volts (pull down switch input) and computer injects fuel like an accelerator pump in a carbureted engine to prevent tip in hesitation. Your reading of 12 , 0 and 12 volts means the computer thinks it's in part throttle and you don't get the extra shot of fuel.
This part's from identifix:
1. At the throttle position sensor, check the voltage on the Blue idle contact input. There should be 5 or 12 volts present with the key on throttle position sensor disconnected. With the sensor plugged in and the engine at idle, there should be 0 volts on the Blue wire. When the throttle is opened slightly, the voltage should jump to either 5 or 12 depending on the reference voltage value.
Last edit: 2 years 1 month ago by jreardon.
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2 years 1 month ago - 2 years 1 month ago #55338
by VegasJAK
"an open mind let's knowledge flow in and wisdom flow out for a man who has neither never listens to those who have both".
Replied by VegasJAK on topic 1992 Corolla diagnosis
Does the condition occur all the time? cold or hot?
As J points out this is a switch system. Should have 12v on both blue and green wires however, in the idle position, blue wire (idle circuit) should have 0v with throttle plate closed.
Is the engine 1.6l?
Just below the throttle plate linkage is there a vacuum line attached to the throttle body?
As J points out this is a switch system. Should have 12v on both blue and green wires however, in the idle position, blue wire (idle circuit) should have 0v with throttle plate closed.
Is the engine 1.6l?
Just below the throttle plate linkage is there a vacuum line attached to the throttle body?
"an open mind let's knowledge flow in and wisdom flow out for a man who has neither never listens to those who have both".
Being wrong doesn't bother me, it's being right and not understanding why that does
Last edit: 2 years 1 month ago by VegasJAK.
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