code 22
11-17-2014, 08:43 PM
#31
Prominent Member
Join Date: Jul 2010
Location: Born on the Florida West Coast, now where can I retire?
Posts: 1,505
Re: code 22
The missing ground connection probably isn't causing the TPS code, but it can't hurt to fix it. The black wire connects to the ground in the pcm which is the same as the vehicle ground, but makes the TPS reading more accurate. Not sure if it could make it zero though. If it were disconnected completely, the code would be different, (DTC21 for high voltage)
Last edited by GaryDoug; 11-17-2014 at 08:49 PM.
11-17-2014, 08:47 PM
#32
Prominent Member
Join Date: Jul 2010
Location: Born on the Florida West Coast, now where can I retire?
Posts: 1,505
Re: code 22
Have you turned off the ignition, unplugged the pcm, and measured the resistance to ground of the blue wire yet? If it is high resistance, the only other possibility is a broken blue wire at the pcm connector (or a bent pin).
Just running another wire in parallel with the original one does not isolate any short to ground that may be on that wire.
Just running another wire in parallel with the original one does not isolate any short to ground that may be on that wire.
11-17-2014, 09:09 PM
#33
Registered User
Thread Starter
Join Date: Jul 2013
Posts: 83
Re: code 22
ok so when you say measure the resistance to the ground of the blue wire, do you mean to take the ohm meter and touch the black cable to a ground and red cable to the blue wire...just making sure i understand this right
11-18-2014, 12:24 PM
#39
Registered User
Thread Starter
Join Date: Jul 2013
Posts: 83
Re: code 22
How are you measuring these? The numbers don't add up.
Ignition on, engine off: Put the black probe of the meter on the engine ground somewhere. To test the meter put the red probe to the battery positive terminal, should read about 12-13vdc depending on battery charge.
Move the red probe to the gray wire, should be 4.9-5.1 vdc. Compare readings when TPS is plugged in or unplugged, should change no more than 0.1 vdc. If it changes more, TPS may be shorted. Move the red probe to the TPS black wire, should be 0vdc.
Move the red probe to the TPS blue wire, should be about 0.3-0.9 vdc at idle setting. Move throttle to max, should read 4-5 vdc.
The 5 vdc reference is used for many sensors. I would think if it were way off, there would be more sensor failure codes.
Ignition on, engine off: Put the black probe of the meter on the engine ground somewhere. To test the meter put the red probe to the battery positive terminal, should read about 12-13vdc depending on battery charge.
Move the red probe to the gray wire, should be 4.9-5.1 vdc. Compare readings when TPS is plugged in or unplugged, should change no more than 0.1 vdc. If it changes more, TPS may be shorted. Move the red probe to the TPS black wire, should be 0vdc.
Move the red probe to the TPS blue wire, should be about 0.3-0.9 vdc at idle setting. Move throttle to max, should read 4-5 vdc.
The 5 vdc reference is used for many sensors. I would think if it were way off, there would be more sensor failure codes.
Last edited by Black93lt1; 11-18-2014 at 04:26 PM.
11-18-2014, 05:00 PM
#40
Prominent Member
Join Date: Jul 2010
Location: Born on the Florida West Coast, now where can I retire?
Posts: 1,505
Re: code 22
I do not get notified for every post on this site, so if you need to get my attention, email me at scan9495@gmail.com.
Wait, I don't think you are measuring ohms with the meter are you? In the position in the video, you are measuring volts. 20v range is not for ohms. Did you change the function to measure ohms?
Last edited by GaryDoug; 11-18-2014 at 05:12 PM.
11-18-2014, 05:07 PM
#41
Prominent Member
Join Date: Jul 2010
Location: Born on the Florida West Coast, now where can I retire?
Posts: 1,505
Re: code 22
Did you have the ignition on when you did the voltage test?
11-18-2014, 05:40 PM
#44
Prominent Member
Join Date: Jul 2010
Location: Born on the Florida West Coast, now where can I retire?
Posts: 1,505
Re: code 22
See this marked up photo.
To measure ohms, set the dial accordingly and then connect the black meter lead to the ground wire of the tps. Connect the red meter lead to the signal wire at the tps. When you move the throttle the reading should change from some low value (not sure, but not near zero) to a higher value (maybe 1000 ohms or higher. I am unsure of the actual tps range at this time. Do this again after plugging everything. The readings should not change significantly.
To measure above 200 ohms, change the meter dial.
To measure volts plug everything back in and turn on the ignition switch (not running). Connect the black meter lead to the battery negative or engine ground. Connect the red meter lead to the tps signal wire. When you move the throttle it shopld change from somewhere about .5 vdc to about 4.5 vdc.
If the OHMs measurement is not what is expected, stop there and troubleshoot the wiring again.
To measure ohms, set the dial accordingly and then connect the black meter lead to the ground wire of the tps. Connect the red meter lead to the signal wire at the tps. When you move the throttle the reading should change from some low value (not sure, but not near zero) to a higher value (maybe 1000 ohms or higher. I am unsure of the actual tps range at this time. Do this again after plugging everything. The readings should not change significantly.
To measure above 200 ohms, change the meter dial.
To measure volts plug everything back in and turn on the ignition switch (not running). Connect the black meter lead to the battery negative or engine ground. Connect the red meter lead to the tps signal wire. When you move the throttle it shopld change from somewhere about .5 vdc to about 4.5 vdc.
If the OHMs measurement is not what is expected, stop there and troubleshoot the wiring again.
Last edited by GaryDoug; 11-18-2014 at 05:44 PM.
11-18-2014, 06:46 PM
#45
Prominent Member
Join Date: Jul 2010
Location: Born on the Florida West Coast, now where can I retire?
Posts: 1,505
Re: code 22
OP response:
"I had the ohm on the wrong setting...it stayed between 134 and 146...I did the voltage test with ignition on and black lead connected to battery ground and red lead connected to the dark blue wire...no matter the change in throttle position it stayed at 0.03"
.
.
Do you mean the reading stayed between 134 and 146 ohms while you moved the throttle? If so, I think I know what is happening. It seems like the sensor is not turning in the housing. Take it off and examine the part that engages with the throttle body. It is either broken or not meshed with the throttle body.
Wish I knew exactly what that looked like. Maybe some member here can tell us how they are connected together. Hey @Injuneer, you reading this?
That value of about 140 ohms agrees with the .03 volts and a 4-5Kohm total resistance of the sensor.
"I had the ohm on the wrong setting...it stayed between 134 and 146...I did the voltage test with ignition on and black lead connected to battery ground and red lead connected to the dark blue wire...no matter the change in throttle position it stayed at 0.03"
.
.
Do you mean the reading stayed between 134 and 146 ohms while you moved the throttle? If so, I think I know what is happening. It seems like the sensor is not turning in the housing. Take it off and examine the part that engages with the throttle body. It is either broken or not meshed with the throttle body.
Wish I knew exactly what that looked like. Maybe some member here can tell us how they are connected together. Hey @Injuneer, you reading this?
That value of about 140 ohms agrees with the .03 volts and a 4-5Kohm total resistance of the sensor.
Last edited by GaryDoug; 11-18-2014 at 08:28 PM.