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I'm having a small issue with my 07 650. When I am running out on the highway I get a slight hesitation or flat spot when I make small throttle changes. I also get little stumbles when I am holding a steady throttle with rpms between 4,000 and 5,000.
I stripped the plastic off it and started running test on the ignition system. Everything was checking out OK until I started testing the throttle position sensor (TPS). I checked the adjustment using the dealer mode and it showed to be OK. I then went to the C14 error code section to see what the readings from the sensor should be. That is when I became totally confused.
Either my manual is messed up or my TPS has gone completely.
The first test of input voltage on the plug coming from the ECM came out good. I am getting 5.1 volts between the red wire and ground or the Red wire and the Black/Brown wire. That is inside the 4.5 V to 5.5 V range. On the plug to the sensor the continuity test between the yellow wire and ground was good.
When I moved to check resistance in the TPS is when things went off. First problem was the color coding on the wires. The manual says I should have a yellow wire and a green or red wire on the sensor plug. The yellow wire I have but the other two wires are blue and black. The blue wire on the sensor plug lines up with the red wire on the ECM side of the plug so I decided that was the one I should use.
The manual says it should have approx 1.1 ohms resistance throttle closed and approx 4.2 throttle open between the two wires. I'm showing 4.4 throttle closed and 1.9 throttle open. The manual says with the key on I should be getting approx 1.1 V throttle closed and approx 4.3 volts throttle open. I'm showing 3.9 volts throttle closed and 1.7 volts throttle open. It's like my TPS is working backwards.
I decided to check between the yellow wire and the black wire and results were similar although they varied a few tens on the readings. They still appeared to be backwards.
I was surprised that I did not have a C14 FI code. I checked the manual on what sets the code. It said that code would only be set if the sensor voltage was outside the range of 0.2 volts to 4.8 volts. Although I seem to be getting backwards readings they are within the acceptable range so no C14 code.
I'm still using the manual I bought for my 05 even though I have an 07. I do have copies of the blue pages that are suppose to show differences between the two years manuals. I can't find anything in those pages that show any differences in the test procedure or the wire color coding.
Now to my questions.
Has anyone else ever check the readings on their TPS. If so which wires did you check between and what readings were you getting throttle open and closed.
Could someone with a newer manual check theirs and see if the procedures for checking the TPS are still the same. In my manual the pages I am looking at are 6-31 and 6-32.
I stripped the plastic off it and started running test on the ignition system. Everything was checking out OK until I started testing the throttle position sensor (TPS). I checked the adjustment using the dealer mode and it showed to be OK. I then went to the C14 error code section to see what the readings from the sensor should be. That is when I became totally confused.
Either my manual is messed up or my TPS has gone completely.
The first test of input voltage on the plug coming from the ECM came out good. I am getting 5.1 volts between the red wire and ground or the Red wire and the Black/Brown wire. That is inside the 4.5 V to 5.5 V range. On the plug to the sensor the continuity test between the yellow wire and ground was good.
When I moved to check resistance in the TPS is when things went off. First problem was the color coding on the wires. The manual says I should have a yellow wire and a green or red wire on the sensor plug. The yellow wire I have but the other two wires are blue and black. The blue wire on the sensor plug lines up with the red wire on the ECM side of the plug so I decided that was the one I should use.
The manual says it should have approx 1.1 ohms resistance throttle closed and approx 4.2 throttle open between the two wires. I'm showing 4.4 throttle closed and 1.9 throttle open. The manual says with the key on I should be getting approx 1.1 V throttle closed and approx 4.3 volts throttle open. I'm showing 3.9 volts throttle closed and 1.7 volts throttle open. It's like my TPS is working backwards.
I decided to check between the yellow wire and the black wire and results were similar although they varied a few tens on the readings. They still appeared to be backwards.
I was surprised that I did not have a C14 FI code. I checked the manual on what sets the code. It said that code would only be set if the sensor voltage was outside the range of 0.2 volts to 4.8 volts. Although I seem to be getting backwards readings they are within the acceptable range so no C14 code.
I'm still using the manual I bought for my 05 even though I have an 07. I do have copies of the blue pages that are suppose to show differences between the two years manuals. I can't find anything in those pages that show any differences in the test procedure or the wire color coding.
Now to my questions.
Has anyone else ever check the readings on their TPS. If so which wires did you check between and what readings were you getting throttle open and closed.
Could someone with a newer manual check theirs and see if the procedures for checking the TPS are still the same. In my manual the pages I am looking at are 6-31 and 6-32.
I have about 4 digital VOM's and 3 analog ones. At work I use analog everyday to check telephone cables. To do a sensor sweep, most times you need an analog VOM.
