RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN 7 (2001)
Fig.17 PCM Location
POWERTRAIN CONTROL MODULE
PCM
The Powertrain Control Module (PCM) is located in the engine compartment. The PCM is referred to as JTEC.
Two different control modules are used: The Powertrain Control Module (PCM), and the Engine Control Module (ECM). The ECM controls the
fuel system. The PCM does not control the fuel system.
The PCM's main function is to control: the vehicle charging system, speed control system, transmission, air conditioning system and certain bussed
messages.
The PCM can adapt its programming to meet changing operating conditions.
The PCM receives input signals from various switches and sensors. Based on these inputs, the PCM regulates various engine and vehicle
operations through different system components. These components are referred to as PCM Outputs. The sensors and switches that provide inputs
to the PCM are considered PCM Inputs.
NOTE: PCM Inputs:
-
A/C request (if equipped with factory A/C)
-
A/C select (if equipped with factory A/C)
-
Accelerator Pedal Position Sensor (APPS) output from ECM
-
Auto shutdown (ASD) relay sense
-
Battery temperature sensor
-
Battery voltage
-
Brake switch
-
CCD bus (+) circuits
-
CCD bus (-) circuits
-
Crankshaft Position Sensor (CKP) output from ECM
-
Data link connection for DRB scan tool
-
Fuel level sensor
-
Generator (battery voltage) output
-
Ignition sense
-
Output shaft speed sensor
-
Overdrive/override switch
-
Park/neutral switch (auto. trans. only)
-
Power ground
-
Sensor return
-
Signal ground
-
Speed control resume switch
-
Speed control set switch
-
Speed control ON/OFF switch
-
Transmission governor pressure sensor
-
Transmission temperature sensor
-
Vehicle speed inputs from ABS or RWAL system
