Rodeo S 2WD L4-2.2L (1999)
Engine Control Module: Component Tests and General Diagnostics
Functional Check
Functional Check
1. Perform the On-Board Diagnostic System Check.
2. Start the engine and run for least one minute.
3. Check for DTCs using Scan Tool.
4. If the PCM fails to program, proceed as follow:
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Ensure that all PCM connections are OK.
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Check the ITCS for latest version software.
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Attempt to program PCM again. If PCM still cannot be programmed properly, replace PCM. The replacement PCM must be programmed.
Multiple PCM Information Sensor DTC's Set
Multiple PCM Information Sensor DTC's Set
Circuit Description
The powertrain control module (PCM) monitors various sensors to determine the engine operating conditions. The PCM controls fuel delivery, spark
advance, and emission control device operation based on the sensor inputs. The PCM provides a sensor ground to all of the sensors. The PCM applies 5
volts through a pull-up resistor, and determines the status of the following sensors by monitoring the voltage present between the 5-volt supply and the
resistor:
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The Fuel Tank Vapor Pressure Sensor
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The throttle position (TP) sensor
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The manifold absolute pressure (MAP) sensor
The PCM provides the following sensors with a 5-volt reference and a sensor ground signal:
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The Linear exhaust gas recirculation (EGR) valve
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The A/C Pressure Sensor
The PCM monitors the separate feedback signals from these sensors in order to determine their operating status.
Diagnostic Aids
NOTE: Be sure to inspect PCM and engine grounds for being secure and clean.
A short to voltage in one of the sensor input circuits may cause one or more of the following DTCs to be set:
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P0108/P1106
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P0113/P1111
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P0118/P1115
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P0123/P1121
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P0463
NOTE: If a sensor input circuit has been shorted to voltage, ensure that the sensor is not damaged. A damaged sensor will continue to indicate a high or
low voltage after the affected circuit has been repaired. If the sensor has been damaged, replace it.
An open in the sensor ground circuit between the PCM and the splice will cause one or more of the following DTCs to be set:
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P0108/P1106
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P0113/P1111
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P0118/P1115
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P0123/P01121
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P0453/P0463
A short to ground in the 5-volt reference A circuit will cause one or more of the following DTCs to be set:
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P0107/P1107
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P0122/P1122
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P0112/P1112
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P0117/P1114
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P0454/P0462
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P0405
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P0532
Check for the following conditions:
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Poor connection at PCM. Inspect the harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged
terminals, and a poor terminal-to-wire connection.
