DTC P1882. Saturn ION 2004

For 1990-2009 cars only

Makes 🢒 Saturn 🢒 2004 🢒 ION 🢒 Transmission/Transaxle 🢒 Automatic Transmission - VT25-E 🢒 DTC P1882

Circuit Description

The transmission control module (TCM) uses the input and output shaft speed sensor input signals to calculate the speed ratio. The speed ratio is then compared to the desired speed ratio, and the difference between the two values is the speed ratio error. If the ratio control response is slow or jerky, a fail counter is incremented a number of counts depending upon the magnitude of the speed ratio error above a calibrated threshold. Conversely, if the ratio control response is smooth and the speed ratio is close to the desired speed ratio the fail counter will be decremented.

When the fail counter has accumulated a calibrated number of fail counts, DTC 1882 sets. DTC P1882 is a type A DTC.

Conditions for Running the DTC

•	No transmission range switch DTCs P0705 or P1756.

•	No ISS DTCs P0716 or P0717.

•	No OSS DTCs P0722 or P0723.

•	No engine torque HSCAN DTC P1779.

•	No ratio control motor DTCs P1883, P1884, P1885, or P1886.

•	No TCC enable solenoid valve DTCs P1888 or P1889.

•	No HSCAN DTCs U2103, U2104, or U2105.

•	The engine speed is greater than 500 RPM for 5 seconds.

•	The selected range is DRIVE.

•	The time since the gear select lever change is greater than 6 seconds.

•	The transmission fluid temperature is greater than 21°C (70°F).

•	The throttle position angle is greater than 5 percent.

•	The transmission input shaft speed is greater than 700 RPM.

•	The transmission output shaft speed is greater than 400 RPM.

•	The speed ratio is between 0.35-1.1.

•	The absolute value of the difference between the speed ratio and the desired speed ratio is greater than 0.42.

Conditions for Setting the DTC

When the fail counter has accumulated 10,000 fail counts.

Action Taken When the DTC Sets

•	The TCM requests the ECM to illuminate the malfunction indicator lamp (MIL).

•	The TCM moves the speed ratio towards a target ratio and then freezes ratio changes.

•	The TCM discontinues use of the closed loop ratio control algorithm. This causes the speed ratio to be defaulted and possibly not accurate. The resulting open loop control may or may not provide optimum ratio performance.

•	The TCM inhibits TCC engagement.

•	The TCM commands maximum pressure to the input clutch.

•	The TCM freezes garage shift transmission adaptive functions.

•	The ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as Freeze Frame and Failure Records.

•	The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.

•	The TCM stores DTC P1882 in TCM history.

Conditions for Clearing the MIL/DTC

•	The ECM turns OFF the MIL after the third consecutive drive trip in which the TCM does not send a MIL illumination request.

•	A scan tool can clear the MIL/DTC.

•	The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without an emission related diagnostic fault occurring.

•	The TCM cancels the DTC default actions when the ignition switch is OFF long enough in order to power down the TCM.

Diagnostic Aids

•	Inspect for intermittent automatic transmission input shaft speed sensor (AT ISS) circuit conditions.

•	Inspect for an incorrect calibration.

•

A misaligned variable ratio control valve lever will cause DTC P1882 to set. One end of the lever must be properly positioned in the ratio control motor pintle, and the opposite end of the lever must be properly positioned in the variable drive pulley follower, which is located on the case cover. If the transmission case cover assembly has been previously removed for service, and was installed after the valve body was installed, misalignment of the lever is possible.

•	A missing or damaged primary pulley snap ring, damaged ratio control motor or a leaking secondary pulley can cause DTC P1882 to set.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

Proper fluid level is important to the normal operation of the transmission.

This determines if the transmission is working properly until the TCC system is going to be engaged. If the TCC enable solenoid is not enabled at this point, the forward clutch may slip.

With the ignition ON and the engine OFF, the ratio control motor will normally make a "whine" noise like an electric hand drill. If the ratio control motor is damaged, the noise will become less constant and start to sound like a "tick" noise like a clock or watch. Finally, when the ratio control motor is frozen, it will produce no noise.

Step

Action

Values

Yes

Did you perform the Diagnostic System Check - Engine Controls?

Go to Step 2

Go to Diagnostic System Check - Engine Controls in Engine Controls - 2.2L (L61)

Visually inspect the transmission cooling system for fluid leaks.
Repair any leaks as necessary.

Refer to Fluid Leak Diagnosis .

Did you find and correct a condition?

Go to Step 14

Go to Step 3

Did you perform the Line Check Procedure?

Go to Step 4

Go to Line Pressure Check

Important: Depending upon the fault, the vehicle may or may not be able to travel at the required speed and the TCC PC Sol. Duty Cycle may not exceed 68 percent.

Install a scan tool.
Turn ON the ignition, with the engine OFF.

Important:

•	Before clearing the DTC, use the scan tool in order to record the Failure Records. Using the Clear Eng./Trans. DTC Info function erases the Failure Records from the TCM.

•	Using the Clear Eng./Trans. DTC Info function erases stored DTCs in both the ECM and TCM.

Record the DTC Failure Records.
Clear the DTC.
Use the scan tool snapshot mode in order to record the following parameters:

•	Desired Speed Ratio

•	Speed Ratio

•	Transmission ISS

•	TCC PC Sol. Duty Cycle

•	Trans. Component Slip

•	Vehicle Speed

Drive the vehicle in transmission range D with the TP angle greater than 5 percent, and the Vehicle Speed greater than 32 km/h (20 mph) until the TCC PC Sol. Duty Cycle increases above 68 percent.

Is desired speed ratio and speed ratio approximately the same during the drive?

Go to Intermittent Conditions in Engine Controls- 2.2L (L61)

Go to Step 5

Did the scan tool display Transmission ISS above the specified value?

10 RPM

Go to Step 6

Go to DTC P0717

Did the scan tool display that the Speed Ratio was approximately the same as Desired Speed Ratio until the vehicle was above the specified value?

32 km/h (20 mph)

Go to Step 7

Go to Step 8

Disconnect the AT inline 20-way connector.
Disconnect the TCM C2 64-way connector.
Test the TCC enable solenoid low control circuit and the TCC enable solenoid high control circuit for continuity between the TCM C2 64-way connector and the AT inline 20-way connector. Refer to Testing for Continuity and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 14

Go to Step 12

Did the speed ratio change slowly or not at all?

Go to Step 9

Go to Step 11

Turn the ignition ON, and the engine OFF.
Use a stethoscope or equivalent device to listen to the top of the transmission just above the AT inline 20-way connector.

Did you hear a muffled "ticking" noise or none at all?

Go to Step 13

Go to Step 10

Inspect for damaged components. Refer to Poor Driveablity - Poor or No Ratio Control .
Repair as necessary. Refer to Control Valve Body Assembly Disassemble .

Did you complete the repair?

Go to Step 14

Inspect for damaged components. Refer to No Drive in Forward Ranges .
Perform root cause and repair as necessary.

Did you complete the repair?

Go to Step 14

Replace the TCC enable solenoid valve. The TCC enable solenoid valve is part of the control solenoid valve assembly.

Refer to Control Valve Body Assembly Disassemble .

Did you complete the replacement?

Go to Step 14

Replace the ratio control motor. The ratio control motor is part of the control solenoid valve assembly.

Refer to Control Valve Body Assembly Disassemble .

Did you complete the replacement?

Go to Step 14

Perform the following procedure in order to verify the repair:

Select DTC.
Select Clear Info.
Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Select specific DTC.
Enter DTC P1882.

Has the test run and passed?

Go to Step 15

Go to Step 2

With the scan tool, observe the stored information, capture info and DTC info.

Does the scan tool display any DTCs that you have not diagnosed?

Go to Diagnostic Trouble Code (DTC) List in Engine Controls - 2.2L (L61)

System OK