Raider 2WD V6-3.7L (2008)
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Engine coolant temperature sensor
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Intake manifold air temperature sensor
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Manifold absolute pressure (MAP) sensor
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Throttle position sensor (TPS)
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Camshaft position sensor signal
During wide open throttle conditions, the following occurs:
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Voltage is applied to the fuel injectors with the ASD relay via the PCM. The PCM will then control the injection sequence and injector pulse width
by turning the ground circuit to each individual injector on and off. The PCM ignores the oxygen sensor input signal and provides a predetermined
amount of additional fuel. This is done by adjusting injector pulse width.
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The PCM adjusts ignition timing by turning the ground path to the coil on and off.
IGNITION SWITCH OFF MODE
When ignition switch is turned to OFF position, the PCM stops operating the injectors, ignition coil, ASD relay and fuel pump relay.
OPERATION
The Transmission Control Module (TCM) controls all electronic operations of the transmission. The TCM receives information regarding vehicle
operation from both direct and indirect inputs, and selects the operational mode of the transmission. Direct inputs are hard wired to, and used specifically
by the TCM. Indirect inputs are shared with the TCM via the vehicle communication bus. Some examples of direct inputs to the TCM are:
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Battery (B+) voltage
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Ignition ON voltage
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Transmission Control Relay (Switched B+) (if equipped)
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Throttle Position Sensor
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Crankshaft Position Sensor
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Transmission Range Sensor
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Pressure Switches
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Transmission Temperature Sensor
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Input Shaft Speed Sensor
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Output Shaft Speed Sensor
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Line Pressure Sensor
Some examples of indirect inputs to the TCM are:
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Engine/Body Identification
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Manifold Pressure
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Target Idle
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Torque Reduction Confirmation
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Engine Coolant Temperature
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Ambient/Battery Temperature
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Scan Tool Communication Based on the information received from these various inputs, the TCM determines the appropriate shift schedule and
shift points, depending on the present operating conditions and driver demand. This is possible through the control of various direct and indirect
outputs.
Some examples of TCM direct outputs are:
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Transmission Control Relay
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Solenoids
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Torque Reduction Request
Some examples of TCM indirect outputs are:
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Transmission Temperature (to PCM)
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PRNDL Position (to cluster/CCN)
In addition to monitoring inputs and controlling outputs, the TCM has other important responsibilities and functions:
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Storing and maintaining Clutch Volume Indexes (CVI)
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Storing and selecting appropriate Shift Schedules
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System self-diagnostics
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Diagnostic capabilities (with scan tool)
NOTE: If the TCM has been replaced, the Quick Learn Procedure must be performed.
BATTERY FEED
A fused, direct battery feed to the TCM is used for continuous power. This battery voltage is necessary to retain memory in the TCM. When the battery
(B+) is disconnected, this memory is lost. When the battery (B+) is restored, this memory loss is detected by the TCM and a Diagnostic Trouble Code
(DTC) is set.
