Chery Tiggo. Manual — part 272
Transaxle Control Module (TCM)
Removal & Installation
1. Disconnect the negative battery cable.
2. Remove the glove box retaining bolts (1).
3. Disconnect the TCM electrical connectors.
4. Remove the four bolts (1) that mount the TCM to
the instrument panel bracket.
5. Remove the TCM.
6. Installation is in the reverse order of removal.
ON-VEHICLE SERVICE
LTSM150086
LTSM080169
F4A4 AUTOMATIC TRANSAXLE
GENERAL INFORMATION
08-144
Description
08-144
Operation
08-145
Specifications
08-147
Special Tools
08-148
Electrical Schematics
08-152
Transaxle Control Module (TCM)
Connector Pin-Out Table
08-157
DIAGNOSIS & TESTING
08-158
Diagnostic Help
08-158
Diagnostic Tools
08-158
Diagnostic Trouble Code (DTC) List
08-159
F4A4 Automatic Transaxle DTC List
08-159
Diagnostic Trouble Code (DTC) Tests
08-160
15 - TFT Sensor Open Circuit
08-160
22 - Input Speed Sensor
08-163
23 - Output Speed Sensor Fault
08-168
26 - Brake Pedal Position Switch Circuit
Malfunction
08-174
31 - Reverse/Low Solenoid Malfunction
08-177
32 - Low Speed Solenoid Malfunction
08-182
33 - 2nd Gear Solenoid Open Circuit
08-188
34 - Overdrive Solenoid Circuit
Malfunction
08-194
36 - Damper Clutch System Control
Solenoid Malfunction
08-200
41 - First Gear, Ratio Out Of Limits
08-206
42 - Second Gear, Ratio Out Of Limits
08-212
43 - Third Gear, Ratio Out Of Limits
08-218
44 - Fourth Gear, Ratio Out Of Limits
08-224
46 - Reverse Gear, Ratio Out Of Limits
08-230
54 - Electrical Relay Open Circuit
08-236
ON-VEHICLE SERVICE
08-240
F4A4 Automatic Transaxle Assembly
08-240
Removal & Installation
08-240
Automatic Shifter Selector
08-243
Removal & Installation
08-243
08
GENERAL INFORMATION
Description
The transaxle gear train is comprised of two rows of planetary gear set, one one-way clutch and five actuators (three
composite disc clutches and two composite disc brakes.
It is controlled with adaptive electronic controls and monitors. The hydraulic system of the transaxle consists of the
transaxle fluid, fluid passages, hydraulic valves, fluid pump, and various line pressure control components.
The Transaxle Control Module (TCM) is the heart of the electronic control system and relies on information from
various direct and indirect inputs (sensors, switches, etc.) to determine driver demand and vehicle operating condi-
tions. With this information, the ECM/TCM can calculate and perform timely and quality shifts through various output
or control devices.
The TCM also performs certain self-diagnostic functions and provides comprehensive information (sensor data,
DTCs, etc.) which is helpful in proper diagnosis and repair. This information can be viewed with the X-431 scan tool.
1 - Low Speed Clutch
2 - Reverse Gear Clutch
3 - Overdrive Clutch
4 - Gear 2 Brake
5 - Low/Reverse Gear Brake
6 - Output Shaft/Transfer Case Driven Gear
LTSM080158
Operation
The transaxle control is divided into the electronic and hydraulic transaxle control functions. While the electronic
transaxle control is responsible for gear selection and for matching the pressures to the torque to be transmitted, the
transaxle’s power supply control occurs via hydraulic elements in the electro-hydraulic control module. The fluid sup-
ply to the hydraulic elements, such as the torque converter, the shift elements and the hydraulic transaxle control, is
provided by way of a fluid pump connected to the torque converter.
The Transaxle Control Module (TCM) allows for the precise adaptation of pressures to the corresponding operating
conditions and to the engine output during the gearshift phase, resulting in a noticeable improvement in shift quality.
The engine speed limit can be reached in the individual gears at full throttle and kickdown. The shift range can be
changed in the forward gears while driving, but the TCM employs a downshift safeguard to prevent engine over
speed. The system offers the additional advantage of flexible adaptation to different vehicle and engine variants.
GENERAL INFORMATION
LTSM080154T
08
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