Saturn Repair Questions? Ask a Mechanic for Answers ASAP
2003 saturn vue 2.2l cvt transmission.... car came in to the shop cause of a transmission problem..it won't drive above twenty miles per hr... we rebuiled the transmission completely, pump, belt, new valve body and speed sensors and new clutches...Also replaced computer.. had one code for p1882. P0713, P0960, P0964 and P1888. car still does not shift to second gear
Hello and thank you for your post. I am a master certified GM tech. If I can help you solve this today then I will, lets begin
when you installed the new belt, was it a complete case cover assembly from GM or was it just the belt or was it an aftermarket rebuilt case cover assembly?
maftermarket rebuilt case cover assy
The code p1882 can be set by tearing the seal on the input shaft when you slide the cover into the transmission OR if the ratio control motor is not dropped into the case cover properly when the valve body is installed
should look like this
should i replace the valve body assy
the other codes are all pointing towards an open or short to the solenoids in the valve body
are you certain that it is plugged in properly at the valve body connector?
and also by the way, there is no 2nd gear
this is a constantly variable ratio trans
will revv like a slip but the speed of the car will increase steadily
then when you hit your speed and let off the throttle, engine speed will come back down
just fyi, because you said it will not go into 2nd gear
that is true, i bought the vavle body used..it measured ok but not sure if it is a good valve body
ok but so many bad connections make me think it might not be plugged in all the way
I doubt all the solenoids are bad
one maybe but 3 or 4?
i should recheck the connection from the conductor body to the 20 pin connector
yes. make sure it is properly plugged in and that no pins are damaged in the valve body or the connector.
the valve body connector (on the vb itself) is solid and has no loose wires so if the body itself is not damaged then you either have some pinched or broken wires leading to the vb from the tcm or the vb is damaged internally
(bad lead frame)
so check that and if you don't find anything I can give you some resistance checks to see what the issue is
or some voltage checks
i will do that now...thank you..i you can give me some resistance and voltage checks that would be great
I have to compile that info...will take a minute or 3
Does the test lamp illuminate?
if it does...Connect a test lamp between battery positive and the low control circuit (CKT 5502) of the TCC enable solenoid valve.Does the test lamp illuminate?it should not
Is the resistance measured less than the specified value of 25Ω?
if it is the lead frame or the tcc enable solenoid is damaged
start with that, see how you make out
ok i will try that
can you tell me what pins are (ckt 5502) and (ckt5501) on the 64 C2 connector
the light did turn on
open between pin 8 and 9 on the 20 pin connector
you mean internal to the trans valve body it is open?
no the connector coming from tcm c2 the connects to the valve body
thats not what you should be checking
you should be checking first for 12v (light lit on 5501)
then for no short to power on the ground wire (light NOT ON in 5502)
if those are both correct then test the resistance of the solenoid in the vb by probing the vb connector (trans side) for resistance through the solenoid itself
both thest light tests are done with the clip on b-
ok will do
sorry, the second test is with the test light clipped to B+
i did get the 12v on (5501)...i got 1.8V on (5502)...and measured 23 ohm on the vb between 5501 and 5502 ckt
retest 5502 with a test light clipped to b+
light did not turn on from b+ to 5502 when ign was on
ok and the solenoid has how many ohms?
ok give me a sec
i want to mention that the vss always shows 2mph. we changed the both input and out put speed sensor to no avail even when we drive it is stuck on 2
ok straight from the gm website...the trans computer is faulty.
I would like you to reconnect all connectors, disconnect the battery cables and touch them together for 1 full minute to clear out all memory, reconnect them and drive it. see what codes return
if these same codes return the tcm is bad
let me know how you make out with that
i will do that
it did the same the only code was P1882 and the VSS shows only 2mph..can you give me some advise on how to check the speed sensor ckt.. this is the second VSS from the dealer we put into this unit
it is looking like a bad tcm
Is the resistance within the specified range?
if it isn't the sensor is bad (doubtful)
if it is then Measure the resistance between TCM terminal C2–58 and ground.Is the resistance greater than the specified value of 50K OHMS?
if it is NOT then
Is the resistance greater than the specified value of 50K ohms?
if not then the wire is shorted to ground
also check for ac voltage at the sensor by testing it this way
Is the AC voltage equal to or greater than the specified value (.5V AC)?
those tests are for the ISS
can you read iss and oss data when driving the truck?
rpm data from the sensors?
1.5k ohm between c2-55 and c2-58
the connection between c2-58 and ground is completely open (no resistance) even when i disconnected the 20 pin connector
that is correct readings. as it should be
now test the OSS ckt the same way
read c2 54 and c2 6 should be between 1 and 2 K OHMS
then read c2 54 and ground. should be OL (NO CONTINUITY)
if all is OK then do the AC mV testing on both ckts
if above .5mV then the issue is in the TCM
with c2 not connected im measure 5.3 VAC between C2-55 and C2-58.. with car in park and engine on
i cant get the .5mv for the oss ckt
thats because the vehicle must be moving. sorry I forgot to mention that
the speedometer works but the vss on the scan tool shows 2mph no matter how fast we r going
if this is a FWD, jack up the ft wheels, if awd lift all 4 off the ground and repeat the test
if you get above .5mV from the oss then the tcm must be the issue
what type of scan tool is that?
snap on solus ultra
this may be a scan tool anomoly because the oss populates the speedo via the ecm and bcm
it feeds the reading to the pcm which sends it to the bcm which sends it to the gage
so if the gage is working then I doubt the iss/oss sensors are reading wrong, it may be a software glitch in the solus
all things are pointing to a bad tcm.
since you read proper resistance through the solenoids from the tcm to the tcm that verified the wiring is all connected.
just be sure the powers and grounds for the tcm are all ok before you replace it
i will buy a different computer...thanks again
but check powers and grounds first...
see attached diagram
the 3 fuses send power and then there are the 2 grounds
check them with a high current test light
I like to use a halogen bulb (headlamp bulb) attach across the powers and grounds, make sure the light lights for all 3 powers and both grounds for at least 5 seconds each