Dodge 2001 Ram 1500, Руководство пользователя

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Based on inputs that it receives, the PCM adjusts
ignition coil dwell. The PCM also adjusts the gener-
ator charge rate through control of the generator
field and provides speed control operation.
NOTE: PCM Inputs:
•
A/C request (if equipped with factory A/C)
•
A/C select (if equipped with factory A/C)
•
Auto shutdown (ASD) sense
•
Battery temperature
•
Battery voltage
•
Brake switch
•
CCD bus (+) circuits
•
CCD bus (-) circuits
•
Camshaft position sensor signal
•
Crankshaft position sensor
•
Data link connection for DRB scan tool
•
Engine coolant temperature sensor
•
Fuel level
•
Generator (battery voltage) output
•
Ignition circuit sense (ignition switch in on/off/
crank/run position)
•
Intake manifold air temperature sensor
•
Leak detection pump (switch) sense (if equipped)
•
Manifold absolute pressure (MAP) sensor
•
Oil pressure
•
Output shaft speed sensor
•
Overdrive/override switch
•
Oxygen sensors
•
Park/neutral switch (auto. trans. only)
•
Power ground
•
Sensor return
•
Signal ground
•
Speed control multiplexed single wire input
•
Throttle position sensor
•
Transmission governor pressure sensor
•
Transmission temperature sensor
•
Vehicle speed inputs from ABS or RWAL system
NOTE: PCM Outputs:
•
A/C clutch relay
•
Auto shutdown (ASD) relay
•
CCD bus (+/-) circuits for: speedometer, voltme-
ter, fuel gauge, oil pressure gauge/lamp, engine temp.
gauge and speed control warn. lamp
•
Data link connection for DRB scan tool
•
EGR valve control solenoid (if equipped)
•
EVAP canister purge solenoid
•
Five volt sensor supply (primary)
•
Five volt sensor supply (secondary)
•
Fuel injectors
•
Fuel pump relay
•
Generator field driver (-)
•
Generator field driver (+)
•
Generator lamp (if equipped)
•
Idle air control (IAC) motor
•
Ignition coil
•
Leak detection pump (if equipped)
•
Malfunction indicator lamp (Check engine lamp).
Driven through CCD circuits.
•
Overdrive indicator lamp (if equipped)
•
Service Reminder Indicator (SRI) Lamp (MAINT
REQ’D lamp). Driven through CCD circuits.
•
Speed control vacuum solenoid
•
Speed control vent solenoid
•
Tachometer (if equipped). Driven through CCD
circuits.
•
Transmission convertor clutch circuit
•
Transmission 3–4 shift solenoid
•
Transmission relay
•
Transmission temperature lamp (if equipped)
•
Transmission variable force solenoid
OPERATION - DIESEL
Two different control modules are used: The Pow-
ertrain Control Module (PCM), and the Engine Con-
trol 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 compo-
nents are referred to as PCM Outputs. The sensors
and switches that provide inputs to the PCM are con-
sidered 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)
8E - 18 ELECTRONIC CONTROL MODULES
BR/BE
POWERTRAIN CONTROL MODULE (Continued)