Wifes van, she was driving it today and check engine light came on. Pulled a P0700 and P0755 looks like shift solenoid b malfunction. I cleared the codes and they came right back as soon as I started it so I dont think its a speed sensor as the car was in park. After the second code clear, the codes dont display but the tranny is stuck in limp mode still.

Worthwhile doing a fluid change(did one with ATF+4 maybe 10-15k ago)? Where is the shift solenoids are they in the tranny and accessable after you remove the pan? Sound like they could be stuck or open or possibly a wiring issue. Going to be away next week so was hoping to resolve this without goign to a shop no time for that.

 

Welcome to DF
P0755 is a 2/4 solenoid circuit code. The problem could be the solenoid pack.

 

I figure if it sets that code without even driving it its certainly not the output speed sensor. Could be the front one however.

• Will also try looking at the grounds.
• Could a tranny fluid change fix this(unlikely)?
• is the solenoid at the front of the tranny along with PRNDL switch?
• I thought it had a P0705 as well the first time the light went on, but I tried resetting the MIL a couple of times and now I dont get any codes. Could the P0705 put it in limp mode and now in limp mode only the P0755 code comes up?
• Will taking the ground off the battery for 10 minutes get it out of limp to see if it comes back?

 

Ok found someone who posted the wiring and it looks like the 2-4 shift solenoid is open internally. http://www.spokentorque.com/forums/s...h-2001-Caravan

From the looks of it the 2-4 solenoid is open while the low/reverse, overdirve and underdrive solenoids each show 300 ohms to ground. I conclude that the solenoid pack needs to be replaced.

• Anything special I need to do after its replaced?
• I heard there is some procedure for the shift points that needs to be done by the dealer while it learn on its own without it?
• Finally the solenoid connector is wet with ATF someone posted that was another sign its on its way out.

Let me know if I should order that solenoid, I am gone all week traveling, but would like to have it waiting for me next weekend.

Here is the tests I performed.

• Pin 19 on TCM connector to Pin 8 (2-4 solenoid) on Solenoid connector with connector disconnected-0 ohms-continuity good.
• Pin 19 to GND- OPEN- GOOD
• Pin 19 to GND(pin 50) with solenoid connected- open solenoid no good
• Pin 20 on TCM connector to Pin 7(Low/reverse) on Solenoid connector with connector disconnected-0 ohms continuity good.
• Pin 20 to GND- OPEN- GOOD
• Pin 20 to GND(pin 50) with solenoid connected- 300 ohms solenoid good
• Pin 59 on TCM connector to Pin 5(UNDERDRIVE SOLENOID CONTROL) on Solenoid connector with connector disconnected-0 ohms continuity good.
• Pin 59 to GND- OPEN-GOOD
• Pin 59 to GND(pin 50) with solenoid connected- 300 ohms solenoid good
• Pin 60 on TCM connector to Pin 6(OVERDRIVE SOLENOID CONTROL) on Solenoid connector with connector disconnected-0 ohms continuity good.
• Pin 60 to GND- OPEN-GOOD
• Pin 60 to GND(pin 50) with solenoid connected- 300 ohms solenoid good

 

Once the solenoid pack is replaced. Just may sure the gasket isn't leaking. You don't need to do a quick learn.

 

Thnx! Any idea of the torque on those? Probably 20-30 in/lbs. Also I heard some of them come with plate that may or may not be used in the 2001 model. Is it safe to get a aftermarket? Autozone has a new Dorman for $160.

 

Just wanted to say that I got the solenoid off ebay for 99 and installed it. Everything works fine. My suggestion for this error is to pull the connector at the TCM and solenoiod and verify connectivty and any shorts to ground. If all is good then put the connector back on the solenoid and check the resistance between ground and each one of the solenoids should be approx 300 ohms. My 2-4 solenoid was open in this test hence the computer put the car in limp home mode. Replacing the solenoid requires you to clean the area very well I used about a can of brake part cleaner and a pan underneath. Next remove the input speed sensor(1" to get to the bolt underneath), the solenoid connector(8mm) and the 3 10 mm bolts on the top of the solenoid. Might have to tap the solenoid on the bottom to dislodge it there is 3 locating dowels. Finally once its off clean that area very well there was a ton of dirt and sand behind the solenoid that needed to be cleaned. Put the new one back on and tighten. I also did a tranny fluid change. Works perfectly took about 2 hours pretty hard to get you hands in there use 1/4 drive racket to get in there. There wa sno relearning or anything drover perfectly first time out.

Thankx again

 

105 in-lbs is the torque spec. I use a blow gun to clear out all the debris prior to removal. take out input speed sensor to access one bolt.