Engine Controls Self-Diagnostics: Overview Chrysler 300M I

Description

Note. Vehicles equipped with a 2.7L engine are equipped with a Manifold Absolute Pressure (MAP) sensor. Vehicles equipped with a 3.2L and 3.5L engine are equipped with an Intake Air Temperature/Manifold Absolute Pressure (IAT/MAP) sensor. For this test, IAT/MAP will be identified as MAP sensor.

Manifold Absolute Pressure (MAP) sensor voltage is monitored with ignition on and engine speed less than 250 RPM. DTC will set in Powertrain Control Module (PCM) memory when PCM senses MAP sensor voltage is less than 2.196 volts but more than .0392 volt for 300 milliseconds. Possible causes are: 5-volt supply circuit open or shorted to ground or voltage, defective MAP sensor, signal circuit open or shorted to ground, or defective PCM.

Note. Vehicles equipped with a 2.7L engine are equipped with a Manifold Absolute Pressure (MAP) sensor. Vehicles equipped with a 3.2L and 3.5L engine are equipped with an Intake Air Temperature/Manifold Absolute Pressure (IAT/MAP) sensor. For this test, IAT/MAP will be identified as MAP sensor.

Manifold Absolute Pressure (MAP) sensor voltage is monitored when engine speed is 600-3500 RPM, Throttle Position (TP) sensor voltage is less than 1.2 volts and battery voltage is more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses MAP sensor voltage is less than .0392 volt for 1.7 seconds. Possible causes are: 5-volt supply circuit open or shorted to ground, defective MAP sensor, signal circuit shorted to ground or sensor ground, or defective PCM.

Note. Vehicles equipped with a 2.7L engine are equipped with a Manifold Absolute Pressure (MAP) sensor. Vehicles equipped with a 3.2L and 3.5L engine are equipped with an Intake Air Temperature/Manifold Absolute Pressure (IAT/MAP) sensor. For this test, IAT/MAP will be identified as MAP sensor.

Manifold Absolute Pressure (MAP) sensor voltage is monitored when engine speed is 300-3500 RPM, Throttle Position (TP) sensor voltage is less than 1.2 volts and battery voltage is more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses MAP sensor voltage is more than 4.96 volts. Possible causes are: signal circuit open or shorted to voltage, defective MAP sensor, sensor ground circuit open, or defective PCM.

Note. Vehicles equipped with a 2.7L engine are equipped with an Intake Air Temperature (IAT) sensor. Vehicles equipped with a 3.2L or 3.5L engine are equipped with an Intake Air Temperature/Manifold Absolute Pressure (IAT/MAP) sensor. For this test, IAT/MAP will be identified as IAT sensor.

Intake Air Temperature (IAT) sensor voltage is monitored with ignition on and battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses IAT sensor voltage is less than .5 volt. Possible causes are: defective IAT sensor, signal circuit shorted to ground or sensor ground, or defective PCM.

Note. Vehicles equipped with a 2.7L engine are equipped with an Intake Air Temperature (IAT) sensor. Vehicles equipped with a 3.2L or 3.5L engine are equipped with an Intake Air Temperature/Manifold Absolute Pressure (IAT/MAP) sensor. For this test, IAT/MAP will be identified as IAT sensor.

Intake Air Temperature (IAT) sensor voltage is monitored with ignition on and battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses IAT sensor voltage is more than 4.9 volts. Possible causes are: signal circuit open or shorted to voltage, defective IAT sensor, sensor ground circuit open or defective PCM.

Engine Coolant Temperature (ECT) sensor voltage is monitored with ignition on and battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses ECT sensor voltage is less than .8 volt for more than 2.6 seconds. Possible causes are: defective ECT sensor, signal circuit shorted to ground or sensor ground, or defective PCM.

Engine Coolant Temperature (ECT) sensor voltage is monitored with ignition on and battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses Engine Coolant Temperature (ECT) sensor voltage is more than 4.96 volts for more than 2.6 seconds. Possible causes are: signal circuit open or shorted to voltage, defective ECT sensor, sensor ground circuit open or defective PCM.

Throttle Position (TP) sensor voltage is monitored with engine running and no Manifold Absolute Pressure (MAP) sensor or TP sensor DTCs present. Engine speed must be more than 1600 RPM for all TP sensor testing. Possible causes are: high resistance in related circuits, partial short to ground in related circuits, defective MAP sensor, defective TP sensor or defective PCM.

Throttle Position (TP) sensor voltage is monitored with ignition on and battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses TP sensor voltage is less than .2 volt for .7 second. Possible causes are: erratic TP sensor voltage change, 5-volt supply circuit open or shorted to ground, defective TP sensor, signal circuit shorted to ground or sensor ground, defective PCM or defective Transmission Control Module (TCM).

Throttle Position (TP) sensor voltage is monitored with ignition on and battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses TP sensor voltage is 4.5 volts for .7 second. Possible causes are: erratic TP sensor voltage change, signal circuit open or shorted to voltage, defective TP sensor, sensor ground circuit open or defective PCM.

Closed loop operation is monitored for 10 minutes after engine is started when battery voltage is more than 10.4 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses that engine coolant temperature does not go to more than 60°F (15°C) within 10 minutes after engine is started. Two trips are required to set this DTC. Possible causes are: defective thermostat or low coolant level.

1/1 Heated Oxygen Sensor (HO2S) voltage is monitored at a cold start, provided engine coolant temperature is less than 98°F (37°C), ambient/battery temperature is within plus or minus 27°F of engine coolant temperature and engine coolant temperature was more than 170°F (77°C) when ignition was last turned off. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 1/1 HO2S voltage is less than .156 volt for 28 seconds after engine is started. Possible causes are: defective 1/1 HO2S, signal circuit shorted to ground, sensor ground or heater ground, or defective PCM.

1/1 Heated Oxygen Sensor (HO2S) voltage is monitored with engine running in closed loop, battery voltage more than 10 volts and engine coolant temperature more than 180°F (82.2°C). DTC will set in Powertrain Control Module (PCM) memory when PCM senses 1/1 HO2S voltage is more than 1.21 volts. Possible causes are: defective 1/1 HO2S, signal circuit open or shorted to voltage, sensor ground circuit open or defective PCM.

Monitor will run with engine idling. If Powertrain Control Module (PCM) senses that 1/1 HO2S voltage switches from less than .39 volt to more than .58 volt and back fewer times than required, monitor will run again only under the following conditions: ambient/battery temperature more than 44°F (7°C), barometric pressure more than 22.13 in. Hg, battery voltage more than 10.5 volts, MAP 11.79-18.15 in. Hg, engine speed 1350-2200 RPM and vehicle speed 50-65 MPH. If PCM senses that 1/1 HO2S still switches fewer times than required, DTC will set in PCM memory. Possible causes are: exhaust leak, high resistance in signal circuit, high resistance in sensor ground circuit or defective HO2S.

1/1 Heated Oxygen Sensor (HO2S) voltage is monitored with engine running for more than 2 minutes and engine coolant temperature is more than 151°F (66°C). Engine must be in closed loop fuel control mode. DTC will set in Powertrain Control Module (PCM) memory if 1/1 HO2S signal voltage is .35-.58 volt for 30 seconds, then 1.5 volts for 60 seconds. Possible causes are: defective 1/1 HO2S, open or high resistance in sensor ground circuit, open or high resistance in signal circuit, or defective PCM.

1/1 Heated Oxygen Sensor (HO2S) heater circuit is monitored with engine at idle immediately after a cold start, with engine coolant temperature less than 147°F (63.9°C) and ambient/battery temperature is within plus or minus 27°F of engine coolant temperature. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 1/1 HO2S voltage is more than 3 volts for 30-90 seconds. Possible causes are: defective 1/1 HO2S, heater ground circuit open, ASD relay output circuit open or defective PCM.

1/2 Heated Oxygen Sensor (HO2S) voltage is monitored at a cold start, provided engine coolant temperature is less than 98°F (37°C), ambient/battery temperature is within plus or minus 27°F of engine coolant temperature and engine coolant temperature was more than 170°F (77°C) when ignition was last turned off. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 1/2 HO2S voltage is less than .156 volt for 28 seconds after engine is started. Possible causes are: defective 1/2 HO2S, signal circuit shorted to ground, sensor ground or heater ground, or defective PCM.

1/2 Heated Oxygen Sensor (HO2S) voltage is monitored when engine has been running for 2 minutes, battery voltage more than 10 volts and engine coolant temperature more than 176°F (80°C). DTC will set in Powertrain Control Module (PCM) memory when PCM senses 1/2 HO2S voltage is more than 1.21 volts. Possible causes are: defective 1/2 HO2S, signal circuit open or shorted to voltage, sensor ground circuit open or defective PCM.

Monitor will run with engine idling. If Powertrain Control Module (PCM) senses that 1/2 HO2S voltage switches from less than .39 volt to more than .58 volt and back fewer times than required, monitor will run again only under the following conditions: ambient/battery temperature more than 44°F (7°C), barometric pressure more than 22.13 in. Hg, battery voltage more than 10.5 volts, MAP 11.79-18.15 in. Hg, engine speed 1350-2200 RPM and vehicle speed 50-65 MPH. If PCM senses that 1/2 HO2S still switches fewer times than required, DTC will set in PCM memory. Possible causes are: exhaust leak, high resistance in signal circuit, high resistance in sensor ground circuit or defective HO2S.

1/2 Heated Oxygen Sensor (HO2S) voltage is monitored with engine running for more than 2 minutes and engine coolant temperature is more than 151°F (66°C). Engine must be in closed loop fuel control mode. DTC will set in Powertrain Control Module (PCM) memory if 1/2 HO2S signal voltage is .35-.58 volt for 30 seconds, then 1.5 volts for 60 seconds. Possible causes are: defective 1/2 HO2S, open or high resistance in sensor ground circuit, open or high resistance in signal circuit, or defective PCM.

1/2 Heated Oxygen Sensor (HO2S) heater circuit is monitored with engine at idle immediately after a cold start, with engine coolant temperature less than 147°F (63.9°C) and ambient/battery temperature is within plus or minus 27°F of engine coolant temperature. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 1/2 HO2S voltage is more than 3 volts for 60-240 seconds. Possible causes are: defective 1/2 HO2S, heater ground circuit open, ASD relay output circuit open or defective PCM.

2/1 Heated Oxygen Sensor (HO2S) voltage is monitored at a cold start, provided engine coolant temperature is less than 98°F (37°C), ambient/battery temperature is within plus or minus 27°F of engine coolant temperature and engine coolant temperature was more than 170°F (77°C) when ignition was last turned off. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 2/1 HO2S voltage is less than .156 volt for 28 seconds after engine is started. Possible causes are: defective 2/1 HO2S, signal circuit shorted to ground, sensor ground or heater ground, or defective PCM.

2/1 Heated Oxygen Sensor (HO2S) voltage is monitored when engine has been running for 2 minutes, battery voltage more than 10 volts and engine coolant temperature more than 176°F (80°C). DTC will set in Powertrain Control Module (PCM) memory when PCM senses 2/1 HO2S voltage is more than 1.21 volts. Possible causes are: defective 2/1 HO2S, signal circuit open or shorted to voltage, sensor ground circuit open or defective PCM.

Engine coolant temperature must be more than 147°F (64°C) for monitor to run. To run monitor, drive vehicle at 10 MPH or more with throttle open for 2 minutes. Stop vehicle and let engine idle with transmission in Drive. DTC will set in Powertrain Control Module (PCM) when PCM senses 2/1 HO2S voltage is switching from less than .27 volt to more than .62 volt and back fewer times than required. Possible causes are: exhaust leak, high resistance in signal circuit, high resistance in sensor ground circuit or defective HO2S.

2/1 Heated Oxygen Sensor (HO2S) voltage is monitored with engine running for more than 2 minutes and engine coolant temperature is more than 151°F (66°C). Engine must be in closed loop fuel control mode. DTC will set in Powertrain Control Module (PCM) memory if 2/1 HO2S signal voltage is .35-.58 volt for 30 seconds, then 1.5 volts for 60 seconds. Possible causes are: defective 2/1 HO2S, open or high resistance in sensor ground circuit, open or high resistance in signal circuit, or defective PCM.

2/1 Heated Oxygen Sensor (HO2S) heater circuit is monitored with engine at idle immediately after a cold start, with engine coolant temperature less than 147°F (63.9°C) and ambient/battery temperature is within plus or minus 27°F of engine coolant temperature. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 2/1 HO2S voltage is more than 3 volts for 30-90 seconds. Possible causes are: defective 2/1 HO2S, heater ground circuit open, ASD relay output circuit open or defective PCM.

2/2 Heated Oxygen Sensor (HO2S) voltage is monitored at a cold start, provided engine coolant temperature is less than 98°F (37°C), ambient/battery temperature is within plus or minus 27°F of engine coolant temperature and engine coolant temperature was more than 170°F (77°C) when ignition was last turned off. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 2/2 HO2S voltage is less than .156 volt for 28 seconds after engine is started. Possible causes are: defective 2/2 HO2S, signal circuit shorted to ground, sensor ground or heater ground, or defective PCM.

2/2 Heated Oxygen Sensor (HO2S) voltage is monitored when engine has been running for 2 minutes, battery voltage more than 10 volts and engine coolant temperature more than 176°F (80°C). DTC will set in Powertrain Control Module (PCM) memory when PCM senses 2/2 HO2S voltage is more than 1.21 volts. Possible causes are: defective 2/2 HO2S, signal circuit open or shorted to voltage, sensor ground circuit open or defective PCM.

Monitor will run with engine idling. If Powertrain Control Module (PCM) senses that 2/2 HO2S voltage switches from less than .39 volt to more than .58 volt and back fewer times than required, monitor will run again only under the following conditions: ambient/battery temperature more than 44°F (7°C), barometric pressure more than 22.13 in. Hg, battery voltage more than 10.5 volts, MAP 11.79-18.15 in. Hg, engine speed 1350-2200 RPM and vehicle speed 50-65 MPH. If PCM senses that 2/2 HO2S still switches fewer times than required, DTC will set in PCM memory. Possible causes are: exhaust leak, high resistance in signal circuit, high resistance in sensor ground circuit or defective HO2S.

2/2 Heated Oxygen Sensor (HO2S) voltage is monitored with engine running for more than 2 minutes and engine coolant temperature is more than 151°F (66°C). Engine must be in closed loop fuel control mode. DTC will set in Powertrain Control Module (PCM) memory if 2/2 HO2S signal voltage is .35-.58 volt for 30 seconds, then 1.5 volts for 60 seconds. Possible causes are: defective 2/2 HO2S, open or high resistance in sensor ground circuit, open or high resistance in signal circuit, or defective PCM.

2/2 Heated Oxygen Sensor (HO2S) heater circuit is monitored with engine at idle immediately after a cold start, with engine coolant temperature less than 147°F (63.9°C) and ambient/battery temperature is within plus or minus 27°F of engine coolant temperature. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 2/2 Heated Oxygen Sensor (HO2S) voltage is more than 3 volts for 30-90 seconds. Possible causes are: defective 2/2 HO2S, heater ground circuit open, ASD relay output circuit open or defective PCM.

Fuel system lean condition is monitored with engine running in closed loop mode, ambient/battery temperature at more than 20°F (-6.7°C), and at altitude less than 8000 feet. DTC will set in Powertrain Control Module (PCM) memory when PCM senses fuel system is running too lean on 2 sequential trips. Also, freeze frame data will be stored and MIL will illuminate. Possible causes are: restricted fuel supply line, fuel pump inlet strainer plugged, defective fuel pump module, defective 1/1 Heated Oxygen Sensor (HO2S), 1/1 HO2S signal circuit shorted to ground, improper 1/1 HO2S heater operation, Throttle Position (TP) sensor voltage more than .92 volt with throttle closed, defective TP sensor, defective Manifold Absolute Pressure (MAP) sensor, defective Engine Coolant Temperature (ECT) sensor, engine mechanical problem or defective fuel filter/pressure regulator.

Fuel system rich condition is monitored with engine running in closed loop mode, ambient/battery temperature at more than 20°F (-6.7°C), and at altitude less than 8000 feet. DTC will set in Powertrain Control Module (PCM) memory when PCM senses fuel system is running too rich on 2 sequential trips. Possible causes for DTC to set are: restricted fuel supply line, fuel pump inlet strainer plugged, defective fuel pump module, defective 1/1 Heated Oxygen Sensor (HO2S), 1/1 HO2S signal circuit open or shorted to voltage, faulty EVAP system operation, defective Throttle Position (TP) sensor, TP sensor voltage more than .92 volt with throttle closed, binding throttle linkage, defective Engine Coolant Temperature (ECT) sensor, engine mechanical problem, defective fuel pressure regulator, defective Manifold Absolute Pressure (MAP) sensor or defective PCM.

Fuel system lean condition is monitored with engine running in closed loop mode, ambient/battery temperature at more than 20°F (-6.7°C), and at altitude less than 8000 feet. DTC will set in Powertrain Control Module (PCM) memory when PCM senses fuel system is running too lean on 2 sequential trips. Also, freeze frame data will be stored and MIL will illuminate. Possible causes are: restricted fuel supply line, fuel pump inlet strainer plugged, defective fuel pump module, defective 2/1 Heated Oxygen Sensor (HO2S), 2/1 HO2S signal circuit shorted to ground, improper 2/1 HO2S heater operation, Throttle Position (TP) sensor voltage more than .92 volt with throttle closed, defective TP sensor, defective Manifold Absolute Pressure (MAP) sensor, defective Engine Coolant Temperature (ECT) sensor, engine mechanical problem or defective fuel filter/pressure regulator.

Fuel system rich condition is monitored with engine running in closed loop mode, ambient/battery temperature at more than 20°F (-6.7°C), and at altitude less than 8000 feet. DTC will set in Powertrain Control Module (PCM) memory when PCM senses fuel system is running too rich on 2 sequential trips. Possible causes for DTC to set are: restricted fuel supply line, fuel pump inlet strainer plugged, defective fuel pump module, defective 2/1 Heated Oxygen Sensor (HO2S), 2/1 HO2S signal circuit open or shorted to voltage, faulty EVAP system operation, defective Throttle Position (TP) sensor, TP sensor voltage more than .92 volt with throttle closed, binding throttle linkage, defective Engine Coolant Temperature (ECT) sensor, engine mechanical problem, defective fuel pressure regulator, defective Manifold Absolute Pressure (MAP) sensor or defective PCM.

Fuel injector operation is monitored with battery voltage more than 10 volts, ASD relay energized and engine speed less than 3000 RPM. DTC will set in Powertrain Control Module (PCM) memory when PCM does not detect an inductive spike after injector turn off. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, injector driver circuit open or shorted to ground, or defective injector.

Fuel injector operation is monitored with battery voltage more than 10 volts, ASD relay energized and engine speed less than 3000 RPM. DTC will set in Powertrain Control Module (PCM) memory when PCM does not detect an inductive spike after injector turn off. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, injector driver circuit open or shorted to ground, or defective injector.

Fuel injector operation is monitored with battery voltage more than 10 volts, ASD relay energized and engine speed less than 3000 RPM. DTC will set in Powertrain Control Module (PCM) memory when PCM does not detect an inductive spike after injector turn off. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, injector driver circuit open or shorted to ground, or defective injector.

Fuel injector operation is monitored with battery voltage more than 10 volts, ASD relay energized and engine speed less than 3000 RPM. DTC will set in Powertrain Control Module (PCM) memory when PCM does not detect an inductive spike after injector turn off. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, injector driver circuit open or shorted to ground, or defective injector.

Fuel injector operation is monitored with battery voltage more than 10 volts, ASD relay energized and engine speed less than 3000 RPM. DTC will set in Powertrain Control Module (PCM) memory when PCM does not detect an inductive spike after injector turn off. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, injector driver circuit open or shorted to ground, or defective injector.

Fuel injector operation is monitored with battery voltage more than 10 volts, ASD relay energized and engine speed less than 3000 RPM. DTC will set in Powertrain Control Module (PCM) memory when PCM does not detect an inductive spike after injector turn off. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, injector driver circuit open or shorted to ground, or defective injector.

Cylinder misfire is monitored anytime engine is running and adaptive numerator has been successfully updated. DTC will set in Powertrain Control Module (PCM) memory when PCM senses more than 2 percent (1.5 percent on low-emission vehicles) misfire rate is measured during 2 trips or with a 10-30 percent misfire rate during one trip. Possible causes are: fuel system problem, secondary ignition or mechanical problem, erratic Camshaft Position (CMP) sensor or Crankshaft Position (CKP) sensor signals, engine mechanical problem or other possible causes for misfire.

Cylinder misfire is monitored anytime engine is running and adaptive numerator has been successfully updated. DTC will set in Powertrain Control Module (PCM) memory when PCM senses more than 2 percent (1.5 percent on low-emission vehicle) misfire rate is measured during 2 trips or with a 10-30 percent misfire rate during one trip. For misfire DTC identification, see CYLINDER MISFIRE DIAGNOSTIC TROUBLE CODE IDENTIFICATION table. Possible causes are: fuel system problem, secondary ignition or mechanical problem, erratic Camshaft Position (CMP) sensor or Crankshaft Position (CKP) sensor signals, engine mechanical problem or other possible causes for misfire.

CYLINDER MISFIRE DIAGNOSTIC TROUBLE CODE IDENTIFICATION

Crank reference signal is monitored during engine cranking. DTC will set in Powertrain Control Module (PCM) memory when PCM senses no Crankshaft Position (CKP) sensor signal during engine cranking, and at least 8 Camshaft Position (CMP) sensor signals have occurred. Possible causes are: 5-volt to 8-volt supply circuit open or shorted, signal circuit open or shorted, sensor ground circuit open, defective CKP sensor or defective PCM.

Knock sensor circuit is monitored with ignition on and engine running. DTC will set in Powertrain Control Module (PCM) when knock sensor circuit voltage falls to less than a minimum value at idle or deceleration. The minimum value is from a look-up table internal to PCM and is based on engine RPM. DTC will also set if sensor output voltage is more than 5 volts. Possible causes are: signal circuit open or shorted, sensor ground circuit open, defective knock sensor or defective PCM.

Cam signal is monitored when engine is cranking or running with battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses at least 5 seconds or 2.5 engine revolutions has past with Crankshaft Position (CKP) sensor signals present but no signals from Camshaft Position (CMP) sensor. Possible causes are: 5-volt to 8-volt supply circuit open or shorted, signal circuit open or shorted, sensor ground circuit open, defective CMP sensor or defective PCM.

Ignition coil primary circuit is monitored with battery voltage more than 8 volts during engine cranking or more than 13 volts with engine running at less than 3000 RPM, and no coils in dwell when checked. DTC will set in Powertrain Control Module (PCM) memory when PCM senses peak current is not achieved with battery based dwell plus 1.5 milliseconds of diagnostic offset. DTC P0351 takes less than 3 seconds to set with engine cranking, or up to 6 seconds with engine running. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, ignition coil driver circuit open or shorted to ground, defective ignition coil No. 1 or defective PCM.

Ignition coil primary circuit is monitored with battery voltage more than 8 volts during engine cranking or more than 13 volts with engine running at less than 3000 RPM, and no coils in dwell when checked. DTC will set in Powertrain Control Module (PCM) memory when PCM senses peak current is not achieved with battery based dwell plus 1.5 milliseconds of diagnostic offset. DTC P0352 takes less than 3 seconds to set with engine cranking, or up to 6 seconds with engine running. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, ignition coil driver circuit open or shorted to ground, defective ignition coil No. 2 or defective PCM.

Ignition coil primary circuit is monitored with battery voltage more than 8 volts during engine cranking or more than 13 volts with engine running at less than 3000 RPM, and no coils in dwell when checked. DTC will set in Powertrain Control Module (PCM) memory when PCM senses peak current is not achieved with battery based dwell plus 1.5 milliseconds of diagnostic offset. DTC P0353 takes less than 3 seconds to set with engine cranking, or up to 6 seconds with engine running. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, ignition coil driver circuit open or shorted to ground, defective ignition coil No. 3 or defective PCM.

Ignition coil primary circuit is monitored with battery voltage more than 8 volts during engine cranking or more than 13 volts with engine running at less than 3000 RPM, and no coils in dwell when checked. DTC will set in Powertrain Control Module (PCM) memory when PCM senses peak current is not achieved with battery based dwell plus 1.5 milliseconds of diagnostic offset. DTC P0354 takes less than 3 seconds to set with engine cranking, or up to 6 seconds with engine running. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, ignition coil driver circuit open or shorted to ground, defective ignition coil No. 4 or defective PCM.

Ignition coil primary circuit is monitored with battery voltage more than 8 volts during engine cranking or more than 13 volts with engine running at less than 3000 RPM, and no coils in dwell when checked. DTC will set in Powertrain Control Module (PCM) memory when PCM senses peak current is not achieved with battery based dwell plus 1.5 milliseconds of diagnostic offset. DTC P0355 takes less than 3 seconds to set with engine cranking, or up to 6 seconds with engine running. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, ignition coil driver circuit open or shorted to ground, defective ignition coil No. 5 or defective PCM.

Ignition coil primary circuit is monitored with battery voltage more than 8 volts during engine cranking or more than 13 volts with engine running at less than 3000 RPM, and no coils in dwell when checked. DTC will set in Powertrain Control Module (PCM) memory when PCM senses peak current is not achieved with battery based dwell plus 1.5 milliseconds of diagnostic offset. DTC P0356 takes less than 3 seconds to set with engine cranking, or up to 6 seconds with engine running. Possible causes are: ASD relay output circuit open or shorted to ground, capacitor(s) shorted to ground, ignition coil driver circuit open or shorted to ground, defective ignition coil No. 6 or defective PCM.

EGR system is monitored with ignition on and battery voltage more than 10.4 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM detects too little or too much of a change in oxygen sensor output signal when EGR is turned off then on. Possible causes are: EGR valve open at idle, EGR solenoid control circuit open or shorted, defective EGR valve, defective EGR solenoid, Auto Shutdown (ASD) relay output circuit open or defective PCM.

EGR system is monitored when engine is running and battery voltage is more than 10.4 volts. DTC will set in Powertrain Control Module (PCM) memory when EGR solenoid control circuit is not in the expected state when actuated by PCM. Possible causes are: defective EGR solenoid, Auto Shutdown (ASD) relay output circuit open, EGR solenoid control circuit open or shorted or defective PCM.

EGR system is monitored when engine is running and battery voltage is more than 10.4 volts. DTC will set in Powertrain Control Module (PCM) memory when EGR flow or valve movement is not as expected. Possible causes are: high resistance in 5-volt supply circuit, EGR sensor signal circuit open, defective EGR sensor, EGR solenoid control circuit open or shorted, sensor ground circuit open or defective PCM.

EGR position sensor voltage is monitored when ignition is on and battery voltage is more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when EGR position sensor voltage is less than .157 volt. Possible causes are: defective EGR position sensor, 5-volt supply circuit open or shorted to ground, signal circuit shorted to ground or sensor ground, or defective PCM.

EGR position sensor voltage is monitored when ignition is on and battery voltage is more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when EGR position sensor voltage is more than 4.9 volts for 6 seconds. Possible causes are: signal circuit open or shorted to voltage, sensor ground circuit open, defective EGR solenoid assembly or defective PCM.

Note. 1/1 Heated Oxygen Sensor (HO2S) may also be referred to as an upstream oxygen sensor. 1/1 HO2S is located in outlet flange of right exhaust manifold. 1/1 catalytic converter is located in right exhaust pipe.

Catalytic converter efficiency is monitored after engine warms up to 147°F (63.8°C), throttle has been open for 180 seconds when vehicle speed is more than 20 MPH, with engine speed at 1200-1700 RPM and MAP vacuum 15-21 in. Hg. DTC will set in Powertrain Control Module (PCM) memory when PCM senses catalyst efficiency deteriorated to a predetermined value. Possible causes are: defective 1/1 catalytic converter, exhaust leak, engine mechanical problem or lazy upstream Heated Oxygen Sensor (HO2S).

Note. 2/1 Heated Oxygen Sensor (HO2S) may also be referred to as an upstream oxygen sensor. 2/1 HO2S is located in outlet flange of left exhaust manifold. 2/1 catalytic converter is located in left exhaust pipe.

Catalytic converter efficiency is monitored after engine warms up to 147°F (63.8°C), throttle has been open for 180 seconds when vehicle speed is more than 20 MPH, with engine speed at 1200-1700 RPM and MAP vacuum 15-21 in. Hg. DTC will set in Powertrain Control Module (PCM) memory when PCM senses catalyst efficiency deteriorated to a predetermined value. Possible causes are: defective 2/1 catalytic converter, exhaust leak, engine mechanical problem or lazy upstream Heated Oxygen Sensor (HO2S).

EVAP purge flow is monitored after engine warms up to more than 170°F (76.7°C) in closed loop mode, at idle for 2 minutes, fuel level is not low, Manifold Absolute Pressure (MAP) at less than 15.7 in. Hg, and altitude at less than 8000 feet. DTC will set in Powertrain Control Module (PCM) memory when PCM senses no airflow through Evaporative Emission (EVAP) system after Leak Detection Pump (LDP) test has been passed. Possible causes are: EVAP purge solenoid leaks or is stuck open or closed, defective EVAP canister, defective EVAP purge solenoid or damaged or plugged vacuum hoses.

EVAP leak monitor is monitored immediately after a cold start, with ambient temperature 40-90°F (4.4-32.2°C) and engine coolant temperature within 10°F of ambient temperature. DTC P0442 will set in Powertrain Control Module (PCM) memory when PCM senses a leak of .040-.080" (1.02-2.03 mm) in Evaporative Emission (EVAP) system. DTC P0455 will set when PCM senses a leak bigger than .080" (2.03 mm) in EVAP system. DTC P0456 will set when PCM senses a leak of .020-.040" (.50-1.02 mm) in EVAP system. Possible causes are: leaking EVAP system component or intermittent Leak Detection Pump (LDP) monitor failure.

EVAP purge solenoid is monitored immediately after ignition is turned on with battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory if actual state of EVAP purge solenoid does not match the intended state when requested to operate by PCM. Possible causes are: EVAP purge solenoid control circuit open or shorted, EVAP purge solenoid sense circuit open or shorted, defective EVAP purge solenoid or defective PCM.

Fuel level is monitored with engine running and fuel level at less than 15 percent or more than 85 percent capacity. DTC will set in Powertrain Control Module (PCM) memory when PCM senses low fuel for more than 120 miles, or high fuel level that does not change by at least 10 percent for more than 100 miles. Possible causes are: damaged fuel tank, signal circuit open or shorted to ground, ground circuit open or defective fuel level sensor.

Fuel level sensor voltage is monitored with ignition on and battery voltage more than 10.4 volts. DTC P0462 will set in Powertrain Control Module (PCM) when fuel level sensor signal voltage is less than .4 volt for more than 90 seconds. DTC P0463 will set in PCM when fuel level sensor signal voltage is more than 9.9 volts for more than 90 seconds. Possible causes are: GOOD TRIP counter equal to zero or an intermittent condition is present.

Vehicle Speed Sensor (VSS) signal is monitored with engine running, transaxle not in Park or Neutral, brakes not applied and engine speed at more than 1500 RPM. DTC will set in Powertrain Control Module (PCM) memory when PCM does not receive a vehicle speed signal from Transmission Control Module (TCM) for more than 11 seconds for 2 consecutive trips. Possible causes are: VSS signal circuit open or shorted, defective TCM or defective PCM.

Idle Air Control (IAC) motor voltage is monitored with engine running, IAC motor operating and battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses a short to ground or battery voltage on any of the 4 IAC driver circuits for 2.75 seconds while IAC motor is active. Possible causes are: IAC driver circuit(s) shorted, defective IAC motor or defective PCM.

Communication between processors over internal BUS and internal controller operation are monitored with ignition on. DTC P0600 will set in Powertrain Control Module (PCM) memory when PCM senses bus communication failure between processors. DTC P0601 will set in PCM when PCM senses internal checksum for software failed and does not match calculated value. Possible cause for DTC to set is: defective PCM.

Generator field driver circuit is monitored with engine running. DTC will set in Powertrain Control Module (PCM) memory when PCM tries to regulate generator field with no result during monitoring. Possible causes are: Auto Shutdown (ASD) relay circuit open, generator field driver circuit open or shorted to ground, defective generator or defective PCM.

A/C clutch relay voltage is monitored with ignition on, A/C on and battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) when PCM senses an open or short in A/C clutch relay control circuit. Possible causes are: defective A/C clutch relay, control circuit open or shorted to ground, or defective PCM.

Electronic Automatic Transaxle (EATX) controller is monitored for DTCs when ignition is on and engine is running. EATX controller may also be referred to as Transmission Control Module (TCM). DTC will set in Powertrain Control Module (PCM) memory if any DTC is set in the TCM. Possible cause for DTC to set is: TCM DTC is present in PCM.

Brake switch sense circuit is monitored when engine is running. Powertrain Control Module (PCM) expects to see signal to be high for 16 cycles while monitoring brake switch signal during acceleration and deceleration modes. DTC may be stored in PCM if improper brakelight switch signal is received. Possible causes are: brake switch sense circuit open or shorted, ground circuit open, defective brakelight switch or defective PCM.

1/1 Heated Oxygen Sensor (HO2S) catalyst monitor is monitored with engine running, coolant temperature more than 170°F (76.7°C), open throttle, vehicle speed steady or slightly increasing between 18 and 55 MPH and engine under light load for at least 5 minutes. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 1/1 HO2S is switching from less than .39 volt to more than .6 volt fewer times than required. Possible causes are: exhaust leak, high resistance in 1/1 HO2S signal circuit, high resistance in 1/1 HO2S ground circuit or defective 1/1 HO2S.

2/1 Heated Oxygen Sensor (HO2S) catalyst monitor is monitored with engine running, coolant temperature more than 170°F (76.7°C), open throttle, vehicle speed steady or slightly increasing between 18 and 55 MPH and engine under light load for at least 5 minutes. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 2/1 HO2S is switching from less than .39 volt to more than .6 volt fewer times than required. Possible causes are: exhaust leak, high resistance in 2/1 HO2S signal circuit, high resistance in 2/1 HO2S ground circuit or defective 2/1 HO2S.

Engine coolant temperature is monitored when engine is running. DTC will set in Powertrain Control Module (PCM) memory when engine does not warm to 160°F (71°C) after 20 minutes since engine was started. Possible cause is a cooling system problem.

Fuel pump relay voltage is monitored with ignition on and battery voltage more than 10.4 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses an open or short condition in fuel pump relay control circuit. Possible causes are: defective fuel pump relay, defective PCM, defective connectors or defective wiring.

Short Runner Valve (SRV) solenoid circuit is monitored when engine is running. To maximize engine performance, SRV system operates under Wide Open Throttle (WOT) conditions with engine speed at more than 5000 RPM. When actuated by Powertrain Control Module (PCM), SRV solenoid is actuated and allows mechanical linkage to redirect airflow to 6 short runners. DTC will set when PCM senses short runner valve solenoid circuit is not in expected state. Possible causes are: defective SRV solenoid, ASD relay output circuit open or shorted, SRV solenoid control circuit open or shorted or defective PCM.

Manifold Tune Valve (MTV) solenoid circuit voltage is monitored with ignition on, Auto Shutdown (ASD) relay energized and battery voltage more than 10.4 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses MTV solenoid circuit is not in expected state. Possible causes are: defective MTV solenoid, ASD relay output circuit open or shorted, MTV solenoid control circuit open or shorted, capacitor(s) shorted to ground or defective PCM.

Engine speed is monitored with engine idling, transmission in Drive, and no Manifold Absolute Pressure (MAP) sensor or Throttle Position (TP) sensor DTCs present. DTC will set in Powertrain Control Module (PCM) memory when PCM senses engine idle speed is at least 200 RPM more or 100 RPM less than target idle speed for 14 seconds. One bad trip is required to set DTC. Possible causes are: defective Idle Air Control (IAC) motor, IAC driver circuit open, vacuum leaks, air intake system leaks or restrictions, defective throttle body or linkage improperly positioned or defective PCM.

Note. Vehicles equipped with a 2.7L engine are equipped with a Manifold Absolute Pressure (MAP) sensor. Vehicles equipped with a 3.2L and 3.5L engine are equipped with an Intake Air Temperature/Manifold Absolute Pressure (IAT/MAP) sensor. For this test, IAT/MAP will be identified as MAP sensor.

MAP sensor signal is monitored when engine speed is within 64 RPM of target idle speed with throttle plate closed. DTC will set in Powertrain Control Module (PCM) memory when PCM senses too small of a difference between barometric pressure (with ignition on) and manifold vacuum (with engine running). Possible causes are: 5-volt supply circuit open or shorted, defective MAP sensor, signal circuit open or shorted, MAP sensor vacuum port restricted or defective PCM.

Manifold Absolute Pressure (MAP) sensor and Throttle Position (TP) sensor signals are monitored with engine running. DTC will set in Powertrain Control Module (PCM) memory when PCM senses MAP sensor signal does not correlate to TP sensor signal. Possible causes are: vacuum leak, defective MAP sensor or defective TP sensor. Most likely cause of DTC to set is a large vacuum leak.

Auto Shutdown (ASD) relay control circuit is monitored with ignition on and battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when PCM senses a short or open in ASD relay control circuit. Possible causes are: defective ASD relay, fused battery voltage circuit open or shorted, ASD relay control circuit open or shorted or defective PCM.

Auto Shutdown (ASD) relay output voltage is monitored with ignition on and battery voltage more than 10.4 volts. DTC will set in Powertrain Control Module (PCM) memory when no voltage is sensed at PCM when ASD relay is energized. Possible causes are: defective ASD relay, ASD relay output circuit open, fused battery voltage circuit open or shorted or defective PCM.

Camshaft Position (CMP) sensor and Crankshaft Position (CKP) sensor signals are monitored with engine running or cranking. DTC will set in Powertrain Control Module (PCM) memory when PCM senses failure counter reaches 20 failures for 2 consecutive trips. Possible causes are: CKP sensor improperly installed, defective CKP sensor, defective CMP sensor, defective PCM, defective tone wheel/flexplate, defective connectors or defective wiring.

Misfire adaptive numerator is monitored under closed throttle deceleration, with A/C off, engine coolant temperature more than 75°F (23.9°C) and more than 50 seconds after engine start. DTC will set in Powertrain Control Module (PCM) memory when PCM senses one of the Crankshaft Position (CKP) sensor target windows has more than 2.86 percent variance from CKP sensor reference window. Possible causes are: improperly installed CKP sensor, defective CKP sensor, defective flywheel/flexplate, defective connectors or defective wiring.

Note. Battery temperature sensor is may also be referred to as ambient temperature sensor.

Ambient temperature sensor voltage is monitored when ignition is on. DTC will set in PCM memory if PCM senses ambient temperature sensor voltage is more than 4.9 volts or less than .1 volt for more than 3.2 seconds. Possible causes are: defective ambient temperature sensor, high resistance in ambient temperature sensor ground circuit, high resistance in ambient temperature sensor signal circuit or defective PCM.

EVAP leak monitor is monitored after cold start with ambient temperature of 40-90°F (4.4-32°C) and coolant temperature within 10°F of ambient temperature. For DTC to set in PCM, Leak Detection Pump (LDP) test must pass first. If PCM suspects a pinched hose, it will not set a DTC until it runs EVAP purge flow monitor. If EVAP purge flow monitor does not pass, pinched hose DTC will be set. Possible causes are: intermittent LDP monitor failure, obstruction in EVAP system between EVAP canister and fuel tank, EVAP canister obstructed, obstruction in hose or tube between EVAP canister and purge solenoid, LDP pressure hose obstructed or defective LDP.

Radiator high speed fan relay voltage is monitored when ignition is on and battery voltage is more than 10 volts. DTC will set in PCM memory if PCM detects an open or shorted condition in high speed radiator fan control relay circuit. Possible causes are: defective high speed radiator fan relay, fused ignition switch output circuit open or shorted, high speed radiator fan relay control circuit open or shorted, or defective PCM.

Radiator low speed fan relay voltage is monitored when ignition is on and battery voltage is more than 10 volts. DTC will set in PCM memory if PCM detects an open or shorted condition in low speed radiator fan relay control circuit. Possible causes are: defective low speed radiator fan relay, fused ignition switch output circuit open or shorted, low speed radiator fan relay control circuit open or shorted, or defective PCM.

Note. Ambient/battery temperature sensor may also be referred to as ambient temperature sensor.

Ambient temperature sensor voltage is monitored with ignition on. DTC will set in Powertrain Control Module (PCM) memory when PCM senses ambient temperature sensor voltage is more than 4.9 volts. Possible causes are: defective ambient temperature sensor, signal circuit open or shorted to voltage, sensor ground circuit open or defective PCM.

Note. Ambient/battery temperature sensor may also be referred to as ambient temperature sensor.

Ambient temperature sensor voltage is monitored with ignition on. DTC will set in Powertrain Control Module (PCM) memory when PCM senses ambient temperature sensor voltage is less than .098 volt. Possible causes are: defective ambient temperature sensor, signal circuit shorted to ground or sensor ground, or defective PCM.

Leak Detection Pump (LDP) switch operation is monitored immediately after a cold start, with ambient temperature 40-90°F (4.4-32.2°C) and engine coolant temperature within 10°F (6°C) of ambient temperature. DTC will set in Powertrain Control Module (PCM) memory when PCM does not sense a change in switch state when LDP solenoid is energized. Possible causes are: leak or obstruction in LDP vacuum supply, defective LDP, LDP switch sense circuit open or shorted, or defective PCM.

Leak Detection Pump (LDP) solenoid circuit is monitored immediately after a cold start, with ambient temperature 40-90°F (4.4-32.2°C) and engine coolant temperature within 10°F of ambient temperature. DTC will set in Powertrain Control Module (PCM) memory when PCM senses state of solenoid circuit does not match PCM's desired state. Possible causes are: defective Leak Detection Pump (LDP), fused ignition switch output circuit open or shorted, LDP solenoid control circuit open or shorted, or defective PCM.

The 5-volt supply circuit is monitored with ignition on. DTC will set in Powertrain Control Module (PCM) memory when PCM senses 5-volt supply circuit voltage is less than 3.5 volts for 4 seconds. Possible causes are: defective Manifold Absolute Pressure (MAP) sensor, defective Throttle Position (TP) sensor, defective EGR solenoid, defective A/C pressure sensor, 5-volt supply circuit shorted to ground or defective PCM.

Charging system voltage is monitored with engine running and engine speed more than 380 RPM. DTC will set in Powertrain Control Module (PCM) memory when PCM senses battery voltage is one volt more than desired system voltage. Possible causes are: inaccurate battery temperature input, generator field driver circuit shorted to ground, defective generator or defective PCM.

A/C pressure sensor signal voltage is monitored with engine running and A/C relay energized. DTC will set in Powertrain Control Module (PCM) memory when PCM senses A/C pressure sensor voltage is more than 4.92 volts. Possible causes are: signal circuit open or shorted to voltage, defective A/C pressure sensor, sensor ground circuit open or defective PCM.

A/C pressure sensor signal voltage is monitored with engine running and A/C relay energized. DTC will set in Powertrain Control Module (PCM) memory when PCM senses A/C pressure sensor voltage is less than .58 volt for 2.6 seconds. Possible causes are: 5-volt supply circuit open or shorted to ground, defective A/C pressure sensor, signal circuit shorted to ground or sensor ground, or defective PCM.

DTC will set in Powertrain Control Module (PCM) when it has not been programmed.

Charging system voltage is monitored when no other charging system DTCs exist and engine speed is more than 1152 RPM. DTC will set in Powertrain Control Module (PCM) memory when PCM senses voltage is one volt less than charging system goal for 13.47 seconds. The PCM senses the battery voltage, turns off field driver and senses battery voltage again. If voltages are the same, DTC will be stored in PCM. Possible causes are: inaccurate battery temperature input, high resistance in generator battery voltage circuit, high resistance in generator ground circuit, generator field driver circuit open, ASD relay output circuit open or defective generator.

Possible causes for DTC to set are: incorrect Vehicle Identification Number (VIN) in PCM, invalid Sentry Key Immobilizer Module (SKIM) key, no communication with SKIM, no VIN programmed in PCM, defective SKIM, defective PCM or SKIM trouble codes are set.

Possible causes for DTC to set are: defective Sentry Key Immobilizer Module (SKIM), loss of SKIM communication, PCI bus circuit open between PCM and SKIM or defective PCM.

Instrument cluster bus is monitored with ignition on. DTC will set in Powertrain Control Module (PCM) memory when no messages are received from instrument cluster for 20 seconds. Possible causes are: intermittent fault in wiring harness or defective PCM.

Messages from Body Control Module (BCM) are monitored with ignition on and battery voltage more than 10 volts. DTC will set in Powertrain Control Module (PCM) memory when no messages are received from BCM for 20 seconds. Possible causes are: intermittent fault in wiring harness or defective PCM.

Note. For circuit identification, see WIRING DIAGRAMS article. If replacing Powertrain Control Module (PCM), PCM must be reprogrammed. See PROGRAMMING . After each repair procedure has been completed, reconnect all components. Perform POWERTRAIN VERIFICATION TEST VER-1 under VERIFICATION TESTS to ensure system is functioning properly.

This is continuously monitored with ignition on. DTC will set in Powertrain Control Module (PCM) memory when PCM's attempt to program/write to internal EEPROM fails. Possible causes for DTC to set are: SRI mileage invalid or defective PCM.

Messages from Transmission Control Module (TCM) are monitored ignition on and battery voltage more than 10 volts. DTC will set in PCM memory if no bus messages are received from TCM for 20 seconds on 2 trips. Possible causes are: communication problem or defective PCM.

Park/Neutral Position (PNP) switch sense circuit is monitored when transaxle is in Park, Neutral or Drive and not in limp-in mode. DTC will set in Powertrain Control Module (PCM) memory if PCM detects an incorrect PNP switch state for a given mode of vehicle operation. Possible causes are: defective Transmission Range Sensor (TRS), TRS T41 switch sense circuit open or shorted to ground, or defective PCM.