94 16valve.
22 DTC means:
TPS Throttle Position Sensor Circuit too low V , TP pin, not idle pin,
ok that is way more SERIOUS THAT, code 22, stuck low is, THAT, totally different symptoms.
that means the 5vdc pin is dead, or the TP pin is shorted to ground at harness.
the TPS has 4 pins.
Ground pin 1
+5vdc reference (power wire from ECU) pin 4 (think of this as 5v battery pin, it is a 5vdc VRM voltage reg module inside the ECU and can go bad)
TP pin 3 (aka, modern name throttle angle pin. at keyon or idle is about 1vdc here.
and the idle switch pin, 0v idle 5vdc not idle. pin2
so if the ground wire breaks, the code 21 happens (TP stuck high) but this is not it.
if the 5vdc pin is dead, the TPS is dead. all the time, for code 22.
make sure the wire there are not damaged. or TPS pins not corroded. or looking green from copper oxide damage.
use your voltmeter, and land on these pins. see these ....? pin 4 is 5vdcm pin 3 is 1vdc. meter black negative test lead on BATTERY minus lug is best. (key on or idling)@!
probe with meter lead red.
click image there 1 time to zoom it and again to unzoom it.
http://www.fixkick.com/ECU/92-95MPI-eng-...e-huge.png
22 DTC means:
TPS Throttle Position Sensor Circuit too low V , TP pin, not idle pin,
ok that is way more SERIOUS THAT, code 22, stuck low is, THAT, totally different symptoms.
that means the 5vdc pin is dead, or the TP pin is shorted to ground at harness.
the TPS has 4 pins.
Ground pin 1
+5vdc reference (power wire from ECU) pin 4 (think of this as 5v battery pin, it is a 5vdc VRM voltage reg module inside the ECU and can go bad)
TP pin 3 (aka, modern name throttle angle pin. at keyon or idle is about 1vdc here.
and the idle switch pin, 0v idle 5vdc not idle. pin2
so if the ground wire breaks, the code 21 happens (TP stuck high) but this is not it.
if the 5vdc pin is dead, the TPS is dead. all the time, for code 22.
make sure the wire there are not damaged. or TPS pins not corroded. or looking green from copper oxide damage.
use your voltmeter, and land on these pins. see these ....? pin 4 is 5vdcm pin 3 is 1vdc. meter black negative test lead on BATTERY minus lug is best. (key on or idling)@!
probe with meter lead red.
click image there 1 time to zoom it and again to unzoom it.
http://www.fixkick.com/ECU/92-95MPI-eng-...e-huge.png
http://www.fixkick.com