Clutch Application Chart
Clutch Application Chart
Solenoids
CAUTION: When working with the transmission control module (TCM) and main control valve body, all suitable safety precautions must be taken to protect the component against electrostatic discharge.
CAUTION: Do not carry out any electrical tests on the TCM and main control valve body. Failure to follow these instructions may result in component damage.
The hydraulic module contains one solenoid valve. The solenoid valve is actuated by the TCM and has two positions (open or closed), it is used to switch the position valve.
There are six electronic pressure control valves, these convert an electric current into a proportional hydraulic pressure. They are energized by the TCM and actuate the valves belonging to the relevant switching elements.
Two types of electronic pressure regulator are installed:
1. Pressure regulator with a rising characteristic (1,3,6 green cap) i.e. as current increases pressure increases (0mA 0 bar / 700mA = 4.6 bar)
2. Pressure regulator with a falling characteristic (2,4,5 black cap) i.e. as current increases the pressure drops (0 mA 4.6 bar / 700 mA = 0 bar)
Both types of regulator have a resistance value of approximately 5 Ohms at 20°C.
Solenoid Application Chart
^ SV1: Solenoid valve
^ PR1: Clutch A
^ PR2: Clutch B
^ PR3: Clutch C
^ PR4: Clutch D & E
^ PR5: System Pressure
^ PR6: Torque Converter Clutch
System inputs and outputs
System inputs
The TCM uses the permanent voltages supply to support and to maintain data in the random access memory (RAM).
The terminal 15 input is used to wake up the TCM. Once awake the TCM commences its initialization sequence. This input is not a power supply input to the TCM. For initialization to commence the ignition must be switched to the "112" position and Vbat above 7V but below 16V (30ms after terminal 15 signal on, the initialization of the TCM starts). Initialization time is 500ms maximum. When initialization is finished, the Drive Program is started and TCM has full functionality.
The TCM has one internal solenoid ground for all internal solenoids (SV and PR).
This internal input acts as the ground for position switch. The TCM requires two vehicle ground supplies (terminal 31). Both ground wires are linked to one grounding point on the vehicle. The TCM incorporates polarity reversal protection.
System outputs
The P/N signal (from the internal position sensor) is used to ensure that the engine is only started with the transmission gear selector in either the Park or Neutral position. When the selector is in either Park or Neutral this output is activated. This in turn closes a relay that allows the starter to be engaged if allowed by the Engine management system. If this output fails the electronic engine controls system uses a CAN bus signal supplied by the TCM to allow the engine to start.
Transmission control
The selector lever can be used to engage Park through to drive (D) mechanically. The link between the lever and the transmission is by a cable.
The manual side of the shifter, 5 through to position 2 are selected electronically by the CAN bus. Integrated with this are functions for gear selected illumination, brake shift interlock and key lock interlock system.