Dodge Caliber. Manual — part 269
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Engine Coolant Temperature Sensor
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Fuel Level Sensor (Bus message)
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Ignition Switch
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Intake Air Temperature Sensor
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Knock Sensor
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Evaporative System Integrity Monitor
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Manifold Absolute Pressure (MAP) Sensor
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Oil Pressure Switch
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Oxygen Sensors
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Power Steering Pressure Switch
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Speed Control Switches
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Vehicle Speed Sensor (MTX-equipped models)
NOTE: PCM Outputs:
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Air Conditioning Clutch Relay
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Charging Indicator Lamp (Bus Message)
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Proportional Purge Solenoid
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Fuel Injectors
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Generator Field
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Ignition Coils
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Malfunction Indicator (Check Engine) Lamp (Bus Message)
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Manifold Flow Valve
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Oxygen Sensors Heater Controls
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Variable Valve Timing
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Vehicle Speed (Manual Transmission)
Based on inputs it receives, the PCM adjusts fuel injector pulse width, idle speed, ignition spark advance, ignition
coil dwell and EVAP canister purge operation. The PCM also determines the appropriate transmission shift schedule
and shift points, depending on the present operating conditions and driver demand. The PCM regulates the cooling
fan, air conditioning and speed control systems. The PCM changes generator charge rate by adjusting the generator
field. The PCM also performs diagnostics.
The PCM adjusts injector pulse width (air-fuel ratio) based on the following inputs.
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Battery voltage
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Coolant temperature
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Exhaust gas content (oxygen sensor)
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Engine speed (crankshaft position sensor)
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Intake air temperature
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Manifold absolute pressure
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Throttle position
The PCM adjusts ignition timing based on the following inputs.
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Coolant temperature
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Engine speed (crankshaft position sensor)
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Knock sensor
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Manifold absolute pressure
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Throttle position
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Transmission gear selection (park/neutral switch)
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Intake air temperature
The PCM also adjusts engine idle speed through the idle air control motor based on the following inputs.
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Air conditioning sense
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Battery voltage
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Brake switch
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ELECTRONIC CONTROL MODULES - SERVICE INFORMATION
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Coolant temperature
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Engine speed (crankshaft position sensor)
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Engine run time
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Manifold absolute pressure
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Power steering pressure switch
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Throttle position
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Transmission gear selection (park/neutral switch)
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Vehicle distance (speed)
The camshaft position sensor and crankshaft position sensor signals are sent to the PCM. If the PCM does not
receive the signal within approximately 1 second of engine cranking, it deactivates the fuel pump. When these are
deactivated, power is shut off to the fuel injectors, ignition coils, oxygen sensor heating elements and fuel pump.
The PCM contains a voltage converter that changes battery voltage to a regulated 5 volts direct current to power
the camshaft position sensor, crankshaft position sensor, manifold absolute pressure sensor, throttle position sensor,
A/C pressure switch, A/C pressure transducer, and vehicle speed sensor.
5 VOLT SUPPLY - PCM OUTPUT
The PCM supplies 5 volts to the following sensors:
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A/C pressure transducer
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Ambient Temperature sensor
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Battery temperature
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Camshaft Position Sensor (NGC)
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Crankshaft Position Sensor (NGC)
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Engine coolant temperature sensor
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Inlet Air Temperature Sensor
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Knock sensor
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Linear EGR solenoid (if equipped)
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Manifold absolute pressure sensor
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Oil Pressure Switch
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Throttle position sensor
STANDARD PROCEDURE
OBTAINING DIAGNOSTIC TROUBLE CODES
BULB CHECK
Key on: Bulb illuminated until vehicle starts, as long as all once per trip (readiness) monitors completed. If monitors
have not been completed, then: Key on: bulb check for about 5 to 8 seconds, lamp then flashes if once per trip
(readiness) monitors have not been completed until vehicle is started, then MIL is extinguished.
OBTAINING DTC’S USING SCAN TOOL
1. Connect the scan tool to the data link (diagnostic) connector. This connector is located in the passenger com-
partment; at the lower edge of instrument panel; near the steering column.
2. Turn the ignition switch on and access the “Read Fault” screen.
3. Record all the DTC’s and “freeze frame” information shown on the scan tool.
4. To erase DTC’s, use the “Erase Trouble Code” data screen on the scan tool. Do not erase any DTC’s until
problems have been investigated and repairs have been performed.
PINION FACTOR SETTING
NOTE: This procedure must be performed if the PCM has been replaced with a NEW or replacement unit.
Failure to perform this procedure will result in an inoperative or improperly calibrated speedometer.
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The vehicle speed readings for the speedometer are taken from the output speed sensor. The PCM must be cali-
brated to the different combinations of equipment (final drive and tires) available. Pinion Factor allows the technician
to set the Powertrain Control Module initial setting so that the speedometer readings will be correct. To properly
read and/or reset the Pinion Factor, it is necessary to use a scan tool.
1. Plug the scan tool into the diagnostic connector located under the instrument panel.
2. Select the Transmission menu.
3. Select the Miscellaneous menu.
4. Select Pinion Factor. Then follow the instructions on the scan tool screen.
REMOVAL
USE THE SCAN TOOL TO REPROGRAM THE NEW POWERTRAIN CONTROL MODULE (PCM) WITH THE
VEHICLES ORIGINAL IDENTIFICATION NUMBER (VIN) AND THE VEHICLES ORIGINAL MILEAGE. IF THIS
STEP IS NOT DONE, A DIAGNOSTIC TROUBLE CODE (DTC) MAY BE SET.
To avoid possible voltage spike damage to PCM, ignition key must be off, and negative battery cable must be dis-
connected before unplugging PCM connectors.
1. Disconnect negative battery cable.
2. Unlock and disconnect the electrical connectors
from PCM.
3. Remove the air cleaner box.
4. Remove the three mounting bolts.
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ELECTRONIC CONTROL MODULES - SERVICE INFORMATION
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5. Tip module out and remove from bracket.
INSTALLATION
USE THE SCAN TOOL TO REPROGRAM THE NEW POWERTRAIN CONTROL MODULE (PCM) WITH THE
VEHICLES ORIGINAL IDENTIFICATION NUMBER (VIN) AND THE VEHICLES ORIGINAL MILEAGE. IF THIS
STEP IS NOT DONE, A DIAGNOSTIC TROUBLE CODE (DTC) MAY BE SET.
1. Tip module into bracket.
2. Install three mounting bolts and tighten to 9 N·m
(80 in. lbs.) torque.
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