GEAR AND SOLENOID OPERATION CHART
| Gear | SSC | SSD | SSE | SSF | SSA | SSB |
|---|---|---|---|---|---|---|
| 1st | OFF | ON | ON | ON | OFF | OFF |
| 1st Engine Braking | OFF | ON | ON | ON | ON | ON |
| 2nd | OFF | ON | ON | OFF | OFF | OFF |
| 3rd | OFF | ON | OFF | ON | OFF | OFF |
| 4th | OFF | OFF | ON | ON | OFF | OFF |
| 5th | ON | OFF | OFF | ON | OFF | OFF |
| 6th | ON | OFF | ON | OFF | OFF | OFF |
GEAR AND SOLENOID OPERATION CHART
Transaxle Description
This transaxle is a compact, lightweight, next generation electronically controlled, 6-speed automatic transaxle that employs Ravigeneaux-type and one single planetary gear set.
This transaxle contains a high-precision clutch hydraulic control system for a smooth, highly responsive gear shift feel.
All hydraulic functions are directed by electronic solenoids to control
- engagement feel.
- shift feel.
- shift scheduling.
- modulated Torque Converter Clutch (TCC) applications.
- engine braking, utilizing the coast clutch.
Scheme 341
When servicing the automatic transaxle, use the bar code identification label located on side of the transaxle case.
Scheme 342
Electronic System Description
The Transmission Control Module (TCM) and its input/output network controls the following operations
- Shift timing
- Line pressure (shift feel)
- Torque Converter Clutch (TCC)
The transaxle control is separate from the engine control strategy in the PCM, although some of the input signals are shared between the TCM and PCM. When determining the best operating strategy for transaxle operation, the TCM uses input information from certain engine-related and driver-demand related sensors and switches supplied by the PCM.
In addition, the TCM receives input signals from certain transaxle-related sensors and switches. The TCM also uses these signals when determining transaxle operating strategy.
Using all of these input signals, the TCM can determine when the time and conditions are right for a shift, or when to apply or release the torque converter clutch. It will also determine the best line pressure needed to optimize shift feel. To accomplish this the TCM uses output solenoids to control transaxle operation.
The following provides a brief description of each of the sensors and actuators used to control transaxle operation.
Diagnostic Parameters Identification (PID) Chart
Special Tools Illustration Tool Name Tool Number Vehicle Communication Module and Integrated Diagnostic System software with appropriate hardware, or equivalent scan tool
| PID Name | Description | Units |
|---|---|---|
| TORQUE | Net engine torque | Torque (lb-ft) |
| TCC_AMP | Torque converter clutch pressure control | Current (amps) |
| SSE_AMP | Shift Solenoid Pressure Control E (SSPCE) | Current (amps) |
| TCCPC | Converter pressure control | Pressure (psi) |
| SSPCE | SSPCE | Pressure (psi) |
| SSPCE_F | SSPCE status | 00 is not fault detected 01 is short circuit to ground 02 is open circuit load 04 is short circuit to battery power 80 is general (non-specific) fault |
| GEAR_OSC | Gear commanded by output state control | 0 = commanded gear is not controlled by OSC 2 = 1st gear is commanded by OSC 4 = 2nd gear is commanded by OSC 12 = 6th gear is commanded by OSC |
| TCC_OSC | Output state control of torque converter | 00 Torque Converter Clutch (TCC) not controlled by OSC 01 TCC is disengaged by OSC 02 TCC is engaged by OSC |
| SSPCD_F | Shift Solenoid Pressure Control D (SSPCD) status | 00 is not fault detected 01 is short circuit to ground 02 is open circuit load 04 is short to battery power 80 is general (non specific) fault |
| TSS_SRC | Turbine Shaft Speed (TSS) | Rpm |
| OSS_SRC | Output Shaft Speed (OSS) | Rpm |
| PCA_F | Pressure Control Solenoid A (PCA) | INT |
| SSPCD | SSPCD | Pressure (psi) |
| PCA | PCA | Pressure (psi) |
| SSD_AMP | Shift Solenoid D (SSD) | Current (amps) |
| PCA_AMP | PCA | Current (amps) |
| TP_REL | Relative throttle position | Percentage |
| DTCTCM | Continuous codes | Number of DTCs |
| TCCSLPDSD | TCC slip desired | Rpm |
| SHFTCTRL | Shift control | 00 Economy mode 01 Sport mode 02 Up slope 1 mode 03 Up slope 2 mode 04 Down slope mode 05 Hot 1 (over temperature 1) mode 06 Hot 2 (over temperature 2) mode 07 Cruise mode 08 Traction mode 09 l Position mode 0A Tiptronic mode 0B Coast shift Flexible Fuel (FF) Invalid data |
| SSPCF_F | Shift Solenoid Pressure Control F (SSPCF) status | 00 is not fault detected 01 is short to ground 02 is open circuit load 04 is short circuit to battery power 80 is general (non-specific) fault |
| SSFAMP_MES | Measured current Shift Solenoid F (SSF) | Current (amps) |
| SSFAMP_CMD | Commanded current SSF | Current (amps) |
| SSPCF_CMD | Commanded pressure SSPCF | Pressure (psi) |
| SSEAMP_MES | Measured current Shift Solenoid E (SSE) | Current (amps) |
| SSDAMP_MES | Measured current SSD | Current (amps) |
| SSCAMP_MES | Measured current Shift Solenoid C (SSC) | Current (amps) |
| TCCAMP_MES | Measured current for the TCC pressure control | Current (amps) |
| PCAAMP_MES | Measured current for PCA | Current (amps) |
| SSPCC_F | Shift Solenoid Pressure Control C (SSPCC) status | 00 is not fault detected 01 is short to ground 02 is open circuit load 04 is short circuit to battery power 80 is general (non-specific) fault |
| SSPCC | SSPCC | Pressure (psi) |
| SSC_AMP | SSPCC current | Current (amps) |
| SSB_F | Shift solenoid 2 status | 00 is not fault detected 01 is short to ground 02 is open circuit load 04 is short circuit to battery power 40 is stack failure 80 is general (non-specific) fault |
| SSA_F | Shift solenoid 1 status | 00 is not fault detected 01 is short to ground 02 is open circuit load 04 is short circuit to battery power 80 is general (non-specific) fault |
| TFT | Transmission Fluid Temperature (TFT) | Temperature (°C, °F) |
| TRAN_RAT | Transmission gear ratio | Ratio |
| TCC_F | TCC fault | 00 is not fault detected 01 is short to ground 02 is open circuit load 04 is short circuit to battery power 80 is general (non-specific) fault |
| VSS | Vehicle Speed Sensor (VSS) | Speed (mph) |
| TFT | TFT | Voltage |
| TCC_RAT | Transmission slip ratio | Ratio |
| TC_SLIPACT | Torque converter slip actual TCCMACT | Rpm |
| TR | Transmission Range (TR) | P = 7 R = 6 N = 5 D = 4 L = 1 |
| OSS | OSS | Rpm |
| TSS | TSS | Rpm |
| Gear | Gear commanded by module | Gear (1-6) |
| VPWRTCM | Module supply voltage VBAT | Voltage |
| RPMTCM | Engine revolutions per minute | Rpm |
| TR_V | TR | Voltage |