Rodeo Sport 2WD V6-3.2L (2001)
PCM Voltage Description
The PCM supplies a buffered voltage to various switches and sensors. It can do this because resistance in the PCM is so high in value that a test light
may not illuminate when connected to the circuit. An ordinary shop voltmeter may not give an accurate reading because the voltmeter input impedance is
too low. Use a 10 megohms input impedance digital voltmeter (such as J 39200) to assure accurate voltage readings.
The input/output devices in the PCM include analog-to-digital converters, signal buffers, counters, and special drivers. The PCM controls most
components with electronic switches which complete a ground circuit when turned "ON." These switches are arranged in groups of 4 and 7, called either
a surface-mounted quad driver module (QDM), which can independently control up to 4 output terminals, or QDMs which can independently control up
to 7 outputs. Not all outputs are always used.
PCM Inputs/Outputs
PCM Input/Outputs
Inputs - Operating Conditions Read
-
Air Conditioning "ON" or "OFF"
-
Engine Coolant Temperature
-
Crankshaft Position
-
Exhaust Oxygen Content
-
Electronic Ignition
-
Manifold Absolute Pressure
-
Battery Voltage
-
Throttle Position
-
Vehicle Speed
-
Fuel Pump Voltage
-
Power Steering Pressure
-
Intake Air Temperature
-
Mass Air Flow
-
Engine knock
-
Camshaft Position
Outputs - Systems Controlled
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EVAP Canister Purge
-
Exhaust Gas Recirculation (EGR)
-
Ignition Control
-
Fuel Control
-
ION Sensing Module
-
Electric Fuel Pump
-
Air Conditioning
-
Diagnostics
-
Malfunction Indicator Lamp
-
Data Link Connector (DLC)
-
Data Output
-
Transmission Control Module
58X Reference PCM Input
58X Reference PCM Input
The powertrain control module (PCM) uses this signal from the crankshaft position (CKP) sensor to calculate engine RPM and crankshaft position at all
engine speeds. The PCM also uses the pulses on this circuit to initiate injector pulses. If the PCM receives no pulses on this circuit, DTC P0337 will set.
The engine will not start and run without using the 58X reference signal.
Electrically Erasable Programmable Read Only Memory (EEPROM)
Electrically Erasable Programmable Read Only Memory (EEPROM)
The electrically erasable programmable read only memory (EEPROM) is a permanent memory chip that is physically soldered within the PCM. The
EEPROM contains the program and the calibration information that the PCM needs to control powertrain operation.
Unlike the PROM used in past applications, the EEPROM is not replaceable. If the PCM is replaced, the new PCM will need to be programmed.
Equipment containing the correct program and calibration for the vehicle is required to program the PCM.
Circuit Operation
