This thing is driving me nuts. It keeps going into limp mode. I am getting a 23(tps malfunction) And 67(MLPsensor voltage error) code. I tried 4 different tps sensors 3 used motorcrafts and currently a new one from carquest. This one has made the most change(for the good, not going into limp mode as often)I have it at the recommended setting, and have tried many diferent settings as well. Any one have any ideas. I see no problems w/any wiring or connectors.
Continuing E-40D Problems
- Thread starter idipwr
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OLDBULL8
Good Morning Ya'll.
The manual says: code 67 MLPS Out of range/AC ON . If the AC clutch is on during test, this code will appear. Shut off the AC or Deforst and repeat test. If the AC unit was OFF during the test, go to the code in the following section.
Following section: 67 MLPS out of range/AC ON.Idicated voltage drop across the MLPS (Manual Lever Position Sensor) exceeds the limits established for each position. AC or Defrost ON: Fault results from the AC clutch being On during quick test.
67: Preform EE test. Place transmission in neutral,
Verify that Manual Lever position Sensor Tool
T89T-20010-J fits in appropriate slots.
If any other codes appear service those codes first as they can effect the electrical operation of the transmission.
So gathering that, you will have to fix the code 23 first.
Right off hand I would say you have a wiring problem someplace.
I would first check the connection on the passenger side of the tranny, remove the shield, unlock the tab and pull the connector out be the wires, check for corroded pins, use a mirror to see the connection on the tranny. Then check the connection on the drivers side for the same thing. Check every grounding connection you can find for corrosion/rust and tightness. Does your tach or speedometer operate irregular?
The TPS...It recieves a 5 volt reference on the Brown/White ---- ground circuit on the Black/White wire. It also sends a .9 volt to 4.5 volt signal on the Green/White wire to the PCM to indicate throttle position.
The IVS is a normally closed switch. It has 2 wires, 1 is a Brown, a fused battery voltage wire , the other is Red/Orange and goes to the PCM to confirm pedal position. When the pedal is in the idle position the Brown wire at the IVS is battery voltage and the Red/Orange wire is 0 volts.
As pedal travel increases to approximately 1.3 volts as indicated on the Green/White wire at the AP sensor[or TPS], the voltage on the Red/Orange wire should increase to battery voltage to indicate acceleration.
Make sure the fuse has a solid connection.
Following section: 67 MLPS out of range/AC ON.Idicated voltage drop across the MLPS (Manual Lever Position Sensor) exceeds the limits established for each position. AC or Defrost ON: Fault results from the AC clutch being On during quick test.
67: Preform EE test. Place transmission in neutral,
Verify that Manual Lever position Sensor Tool
T89T-20010-J fits in appropriate slots.
If any other codes appear service those codes first as they can effect the electrical operation of the transmission.
So gathering that, you will have to fix the code 23 first.
Right off hand I would say you have a wiring problem someplace.
I would first check the connection on the passenger side of the tranny, remove the shield, unlock the tab and pull the connector out be the wires, check for corroded pins, use a mirror to see the connection on the tranny. Then check the connection on the drivers side for the same thing. Check every grounding connection you can find for corrosion/rust and tightness. Does your tach or speedometer operate irregular?
The TPS...It recieves a 5 volt reference on the Brown/White ---- ground circuit on the Black/White wire. It also sends a .9 volt to 4.5 volt signal on the Green/White wire to the PCM to indicate throttle position.
The IVS is a normally closed switch. It has 2 wires, 1 is a Brown, a fused battery voltage wire , the other is Red/Orange and goes to the PCM to confirm pedal position. When the pedal is in the idle position the Brown wire at the IVS is battery voltage and the Red/Orange wire is 0 volts.
As pedal travel increases to approximately 1.3 volts as indicated on the Green/White wire at the AP sensor[or TPS], the voltage on the Red/Orange wire should increase to battery voltage to indicate acceleration.
Make sure the fuse has a solid connection.
LCAM-01XA
Full Access Member
What the heck is an IVS? And where is it located?
trackspeeder
Stone crusher.
IVS is the Idle Validation Switch. We don't get of those dodads on the IDI. Its for the EFI guys.
trackspeeder
Stone crusher.
This is a bizarre problem. If every thing looks good in the wiring dept,check the brake lights. A bad bulb will make funky things happen.
LCAM-01XA
Full Access Member
I work on gassers too, and I don't recall seeing anything like that on the engine, just TPS - of course I never looked for it either... Where does the IVS live?IVS is the Idle Validation Switch. We don't get of those dodads on the IDI. Its for the EFI guys.
trackspeeder
Stone crusher.
On the go pedal for the PSD's. It there to prevent a Toyota episode.
LCAM-01XA
Full Access Member
Haha, OK, that makes sense
Well it is finally fixed. It appears it was the tac sensor. It had a piece of insulation missing on one of the wires and was shorting out on the vacum pump. I never got a tac sensor code until the last time it limped out. Now I can move onto other problems/quirks/projects.
