Dodge Ram Truck 1500-2500-3500. Manual — part 308
REMOVAL
1. Remove the negative battery cable from the battery.
2. Pull up on the ABM harness connector release and remove connector.
3. Remove the ABM mounting bolts.
4. Remove the pump connector from the ABM.
5. Remove the ABM from the HCU.
INSTALLATION
NOTE: If the ABM is being replaced with a new ABM is must be reprogrammed with the use of a DRB III.
1. Install ABM to the HCU.
2. Install the pump connector to the ABM.
3. Install mounting bolts. Tighten to 2 N·m (16 in. lbs.).
4. Install the wiring harness connector to the ABM and push down on the release to secure the connector.
5. Install negative battery cable to the battery.
DATA LINK CONNECTOR
DESCRIPTION
The Data Link Connector (DLC) (3) is a 16-way
molded plastic connector insulator on a dedicated take
out of the instrument panel wire harness. This connec-
tor is located at the lower edge of the instrument
panel, outboard of the steering column. The connector
insulator is retained by integral snap features within a
rectangular cutout in the stamped metal lower instru-
ment panel reinforcement (2), just below the lower
edge of the instrument panel steering column opening
cover (1).
OPERATION
The Data Link Connector (DLC) is an industry-standard 16-way connector that permits the connection of a diag-
nostic scan tool to the Programmable Communications Interface (PCI) data bus for interfacing with, configuring, and
retrieving Diagnostic Trouble Code (DTC) data from the electronic modules that reside on the data bus network
within the vehicle.
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ELECTRONIC CONTROL MODULES - SERVICE INFORMATION
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MODULE-ENGINE CONTROL - DIESEL
DESCRIPTION - ECM
The Engine Control Module (ECM) for the 5.9L diesel engine (16) is bolted to the left side of the engine below the
intake manifold.
OPERATION - ECM
The main function of the Engine Control Module (ECM) is to electrically control the fuel system. The ECM also
controls certain transmission and other functions previously controlled by the Powertrain Control Module (PCM).
The ECM can adapt its programming to meet changing operating conditions.
CUMMINS FUEL SYSTEM COMPONENTS
1 - ENGINE COOLANT TEMPERATURE (ECT) SENSOR
14 - FUEL DRAIN TUBE
2 - INTAKE MANIFOLD AIR HEATER/ELEMENTS
15 - OIL PRESSURE SWITCH
3 - FUEL PRESSURE SENSOR
16 - ENGINE CONTROL MODULE (ECM)
4 - FUEL PRESSURE LIMITING VALVE
17 - FUEL INJECTION PUMP
5 - HIGH-PRESSURE FUEL LINES
18 - CRANKSHAFT POSITION (ENGINE SPEED) SENSOR
6 - FUEL HEATER
19 - CAMSHAFT POSITION SENSOR (CMP)
7 - HIGH-PRESSURE FUEL RAIL
20 - FUEL CONTROL ACTUATOR (FCA)
8 - FUEL HEATER TEMPERATURE SENSOR (THERMOSTAT)
21 - CASCADE OVERFLOW VALVE
9 - FUEL FILTER/WATER SEPARATOR
10 - FUEL DRAIN MANIFOLD (CYLINDER HEAD FUEL RETURN
LINE)
11 - DRAIN VALVE
12 - FUEL RETURN LINE CONNECTION (TO FUEL TANK)
13 - FUEL SUPPLY LINE (LOW-PRESSURE, TO ENGINE)
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ELECTRONIC CONTROL MODULES - SERVICE INFORMATION
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The ECM receives input signals from various switches and sensors. Based on these inputs, the ECM regulates
various engine and vehicle operations through different system components. These components are referred to as
ECM Outputs. The sensors and switches that provide inputs to the ECM are considered ECM Inputs.
NOTE: ECM Inputs:
•
Accelerator Pedal Position Sensor (APPS) Signals #1 and #2
•
AC system pressure
•
Auto shutdown (ASD) sense
•
Battery temperature
•
Battery temperature sensor
•
Battery voltage
•
Brake switch
•
Camshaft Position Sensor (CMP)
•
Crankshaft Position Sensor (CKP)
•
Data link connection for DRB scan tool
•
Engine Coolant Temperature (ECT) sensor
•
EATX module (if equipped)
•
Fuel level
•
Fuel pressure sensor
•
Fan speed (engine cooling fan)
•
Generator (battery voltage) output
•
Governor pressure (Auto. trans.)
•
Ground circuits
•
Inlet air temperature sensor/pressure sensor
•
Intake air temperature sensor/MAP sensor
•
J1850 bus (+) circuits
•
J1850 bus (-) circuits
•
Key switch (ignition)
•
Oil Pressure switch
•
Overdrive switch (automatic transmission only)
•
Park/neutral switch (auto. trans. only)
•
Power ground
•
SCI datalink bus (+) circuits
•
SCI datalink bus (-) circuits
•
Sensor return
•
Signal ground
•
Speed control multiplexed single wire input
•
Transfer case switch (4WD range position)
•
Transmission governor psi (automatic transmission only)
•
Transmission OSS (automatic transmission only)
•
Transmission oil pressure (automatic transmission only)
•
Transmission oil temperature (automatic transmission only)
•
Transmission throttle valve position (automatic transmission only)
•
Vehicle speed signal
•
Water-In-Fuel (WIF) sensor
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ELECTRONIC CONTROL MODULES - SERVICE INFORMATION
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NOTE: ECM Outputs:
After inputs are received by the ECM, certain sensors, switches and components are controlled or regulated by the
ECM. These are considered ECM Outputs. These outputs are for:
•
A/C clutch relay
•
Auto shutdown (ASD) relay
•
Data link connection for DRB scan tool
•
Fan clutch PWM
•
Five volt sensor supply (primary)
•
Five volt sensor supply (secondary)
•
Fuel control actuator
•
Fuel injector driver circuits
•
Fuel transfer (lift) pump
•
Generator field driver (-)
•
Generator field driver (+)
•
Governor pressure (VFS solenoid)
•
Intake manifold air heater relays #1 and #2 control circuits
•
J1850 bus (+/-) circuits for: speedometer, voltmeter, fuel gauge, oil pressure gauge/lamp, engine temp. gauge
and speed control warn. lamp
•
Malfunction indicator lamp (Check engine lamp). Driven through J1850 circuits.
•
Oil pressure switch/warning lamp (databus)
•
Overdrive/3–4 shift solenoid (automatic transmission only)
•
SC source
•
SCI datalink bus (+) circuits
•
SCI datalink bus (-) circuits
•
Speed control vacuum solenoid
•
Speed control vent solenoid
•
Tachometer (if equipped). Driven through J1850 circuits.
•
TCC solenoid (automatic transmission only)
•
Transmission battery relay (automatic transmission only)
•
Transmission throttle valve actuator (automatic transmission only)
•
Transmission governor psi solenoid (automatic transmission only)
•
Wait-to-start warning lamp (databus)
•
Turbo wastegate solenoid
•
Water-In-Fuel (WIF) warning lamp (databus)
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