Engine Controls - Tests W/codes: Other Chrysler LHS II

Monitored Circuits

The PCM contains electronic circuit monitors that monitor fuel, vehicle emissions, engine and ignition system performance. Monitors do not indicate a specific component failure, but do indicate an implied failure within a specified system, and that the problem must be diagnosed. If any monitor detects a problem affecting vehicle emissions, a Diagnostic Trouble Code (DTC) will be stored in PCM and MIL will be illuminated. The following monitors are used

1. EGR Monitor
2. Engine Misfire Monitor
3. Fuel System Monitor
4. Oxygen Sensor Monitor
5. Oxygen Sensor Heater Monitor
6. Catalyst Monitor
7. EVAP System Leak Detection Monitor

When the MIL is illuminated, a DTC is stored. The DTC can self-erase only when MIL is out. When MIL is out, PCM must pass a diagnostic test for the most recent DTC for 40 warm-up cycles (80 warm-up cycles for fuel system monitor and misfire monitor).

A warm-up cycle is defined as the engine is running, an increase of 40°F (4°C) in engine coolant temperature exists after engine is started, and engine coolant temperature reaches at least 160°F (71°C). A driving cycle is defined as engine start up and engine shut off.

DTCs may be retrieved for system diagnosis. See RETRIEVING DIAGNOSTIC TROUBLE CODES .

Non-Monitored Circuits

PCM does not monitor all circuits, conditions and systems that could cause a malfunction or driveability problem. However, problems with these systems may cause PCM to store DTCs for other systems or components.

As an example a fuel pressure problem (clogged fuel filter or pinched fuel line) will not identify a fault directly, but could cause a rich/lean condition or misfire. This could also cause PCM to store an oxygen sensor DTC. The major non-monitored circuits are identified below

1. Cylinder Compression
2. Excessive Oil Consumption
3. Exhaust System
4. Fuel Injector Mechanical Faults
5. Fuel Pressure
6. PCM Connector Engagement
7. PCM System Ground
8. Secondary Ignition System
9. Throttle Body Airflow
10. Vacuum Assist

SERVICE PRECAUTIONS

Before proceeding with diagnosis, the following precautions must be followed

1. Ensure fuel pressure is released before removing fuel line or fittings, as fuel system is under pressure and may cause personal injury. See «FUEL SYSTEM PRESSURE RELEASE»(ref-576-S30312854432000030800000) .
2. When using SELF-DIAGNOSTIC TESTS for diagnosis, DO NOT skip any steps, or incorrect diagnosis may result. Always perform indicated verification procedure after repairs are made.
3. When using a jumper wire, ensure either jumper wire or circuit is fuse-protected.
4. Before disconnecting connector from any control module, ensure ignition is off before removing connector.
5. When checking voltage or continuity at any control module, probe connector for control module from pin side. DO NOT backprobe connector or probe wires through the insulation unless specifically directed to do so.
6. DO NOT cause short circuits when performing electrical tests. This will set additional Diagnostic Trouble Codes (DTCs), making diagnosis of original problem more difficult.
7. Use specified test equipment when performing electrical tests.

FUEL SYSTEM PRESSURE RELEASE

1. Remove fuel pump relay. Fuel pump relay is located in power distribution center at driver's side front corner of engine compartment, just in front of strut tower.
2. Start engine and allow engine to idle until engine stalls. Attempt to restart engine until engine will no longer run. Turn ignition off.
3. Diagnostic Trouble Codes (DTC) may have been stored in Powertrain Control Module (PCM) due to the removal of fuel pump relay. Using scan tool, clear DTCs from PCM. See «CLEARING DIAGNOSTIC TROUBLE CODES»(ref-576-S01032862372000030800000) .

ABS & Air Bag Systems

Enter correct VIN and mileage in PCM. Erase codes for ABS and air bag modules.

SKIM Theft Alarm System

Connect scan tool to Data Link Connector (DLC). Go to ENGINE, MISC. Using appropriate PIN code for this vehicle, place SKIM in Secured Access mode. Select UPDATE SECRET KEY DATA. Data will be transferred from SKIM to PCM.

Battery must be fully charged before performing any tests. If battery is low, charge battery and then attempt to start vehicle. If vehicle will not start, crank engine for 15 seconds, 3 consecutive times. Cranking engine will allow any trouble codes to set which may have been erased from a dead battery. Using scan tool, read trouble codes. Repair any set trouble codes before continuing with no start diagnosis.

To correct a no start problem, begin with TEST NS-1A . TEST NS-1A will lead through testing as required to fix vehicle. If a particular symptom is present and only that symptom is being diagnosed, see NO START SELECTION MENU table. Check Technical Service Bulletins (TSB) for any pertinent information. If a TSB exists, perform corrective procedure as instructed.

NO START SELECTION MENU

Enter correct VIN and mileage in PCM. Erase codes for ABS and air bag modules.

Connect scan tool to Data Link Connector (DLC). Go to ENGINE, MISC. Using appropriate PIN code for this vehicle, place SKIM in Secured Access mode. Select UPDATE SECRET KEY DATA. Data will be transferred from SKIM to PCM. This is required for vehicle to start with new PCM.

If 3 attempts are made to enter secured access mode using an incorrect PIN, secured access mode will be locked out for one hour. To exit out of lock out mode, leave ignition key in RUN position for one hour. Ensure all accessories are turned off. Monitor battery state and connect a battery charger if necessary.

Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. Inspect engine oil for fuel contamination. Change oil and filter as necessary. Attempt to start engine.

If engine does not start, check for Technical Service Bulletins (TSB) that apply to vehicle and return to RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM, if necessary. Repair is complete.

Enter correct VIN and mileage in PCM. Erase codes for ABS and air bag modules.

Connect scan tool to Data Link Connector (DLC). Go to ENGINE, MISC. Using appropriate PIN code for this vehicle, place SKIM in Secured Access mode. Select UPDATE SECRET KEY DATA. Data will be transferred from SKIM to PCM. This is required for vehicle to start with new PCM.

If 3 attempts are made to enter secured access mode using an incorrect PIN, secured access mode will be locked out for one hour. To exit out of lock out mode, leave ignition key in RUN position for one hour. Ensure all accessories are turned off. Monitor battery state and connect a battery charger if necessary.

Inspect vehicle to ensure all engine components are connected. If any DTCs have not been diagnosed, perform appropriate diagnostic test(s). See DTC MESSAGES & CODES table under DIAGNOSTIC TROUBLE CODE DEFINITIONS. If all DTCs have been diagnosed, return to appropriate Verification Test. If this test is being performed after a No Trouble Code (NTC) test, perform NO TROUBLE CODE REPAIR PROCEDURE .

Enter correct VIN and mileage in PCM. Erase codes for ABS and air bag modules.

Connect scan tool to Data Link Connector (DLC). Go to ENGINE, MISC. Using appropriate PIN code for this vehicle, place SKIM in Secured Access mode. Select UPDATE SECRET KEY DATA. Data will be transferred from SKIM to PCM. This is required for vehicle to start with new PCM.

If 3 attempts are made to enter secured access mode using an incorrect PIN, secured access mode will be locked out for one hour. To exit out of lock out mode, leave ignition key in RUN position for one hour. Ensure all accessories are turned off. Monitor battery state and connect a battery charger if necessary.

Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. Using scan tool, erase any DTCs. To ensure no other charging system problems are present, perform the following procedure

1. Start engine. Perform generator output test. See GENERATORS & REGULATORS article in ELECTRICAL section. Raise engine speed to 2000 RPM for at least 30 seconds. Allow engine to idle. Turn engine off. Turn ignition on. Using scan tool, read Diagnostic Trouble Codes (DTCs).
2. If repaired DTC has reset, repair is not complete. Check for related Technical Service Bulletins (TSB) that pertain to a charging system problem. See «DTC MESSAGES & CODES»(ref-576-S35197105972000030800000) table under DIAGNOSTIC TROUBLE CODE DEFINITIONS, if necessary. If repaired DTC is not reset, repair is complete.

Enter correct VIN and mileage in PCM. Erase codes for ABS and air bag modules.

Connect scan tool to Data Link Connector (DLC). Go to ENGINE, MISC. Using appropriate PIN code for this vehicle, place SKIM in Secured Access mode. Select UPDATE SECRET KEY DATA. Data will be transferred from SKIM to PCM. This is required for vehicle to start with new PCM.

If 3 attempts are made to enter secured access mode using an incorrect PIN, secured access mode will be locked out for one hour. To exit out of lock out mode, leave ignition key in RUN position for one hour. Ensure all accessories are turned off. Monitor battery state and connect a battery charger if necessary.

Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. Using scan tool, erase any DTCs. To ensure no other speed control problems are present, perform the following procedure

1. Road test vehicle at more than 30 MPH. Turn speed control on. Depress and release SET switch. If speed control engages, go to next step. If speed control does not engage, repair is not complete. Go to step 11 .
2. Quickly depress and release RESUME/ACCEL switch. If vehicle speed increases by 2 MPH, go to next step. If vehicle speed did not increase by 2 MPH, repair is not complete. Go to step 11 .
3. Press and hold COAST switch. Vehicle speed should decrease. If vehicle speed decreases, go to next step. If vehicle speed does not decrease, repair is not complete. Go to step 11 .
4. Depress and release brake pedal. Speed control should disengage. If speed control disengages, go to next step. If speed control does not disengage, repair is not complete. Go to step 11 .
5. Bring vehicle speed back up to 25 MPH. Depress RESUME/ACCEL switch. Speed control should resume previously set vehicle speed. If speed control resumed previously set vehicle speed, go to next step. If speed control did not resume previously set vehicle speed, repair is not complete. Go to step 11 .
6. Press and hold SET switch. Vehicle speed should decrease. If vehicle speed decreases, go to next step. If vehicle speed does not decrease, repair is not complete. Go to step 11 .
7. With vehicle speed more than 30 MPH and speed control engaged, press and hold SET switch, letting vehicle accelerate to a new speed. Release SET switch. Vehicle should adjust to new vehicle speed. If vehicle speed adjusted to new vehicle speed, go to next step. If vehicle speed did not adjust to new vehicle speed, repair is not complete. Go to step 11 .
8. Depress and release CANCEL switch. Speed control should disengage. If speed control disengages, go to next step. If speed control does not disengage, repair is not complete. Go to step 11 .
9. Bring vehicle speed to more than 35 MPH and engage speed control. Turn ON/OFF switch to OFF position. Speed control should disengage. If speed control disengages, go to next step. If speed control does not disengage, repair is not complete. Go to step 11 .
10. Vehicle has successfully passed all tests. Speed control is functioning properly. Repair is complete.
11. Check for related Technical Service Bulletins (TSB) that pertain to a speed control problem. Proceed to appropriate DTC test. See «DTC MESSAGES & CODES»(ref-576-S35197105972000030800000) table under DIAGNOSTIC TROUBLE CODE DEFINITIONS, if necessary.

For ABS & Air Bag Systems

Enter correct VIN and mileage in PCM. Erase codes for ABS and air bag modules.

For SKIM Theft Alarm System

Connect scan tool to Data Link Connector (DLC). Go to ENGINE, MISC. Using appropriate PIN code for this vehicle, place SKIM in Secured Access mode. Select UPDATE SECRET KEY DATA. Data will be transferred from SKIM to PCM. This is required for vehicle to start with new PCM.

If 3 attempts are made to enter secured access mode using an incorrect PIN, secured access mode will be locked out for one hour. To exit out of lock out mode, leave ignition key in RUN position for one hour. Ensure all accessories are turned off. Monitor battery state and connect a battery charger if necessary.

Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. If DTCs have not been diagnosed, perform appropriate diagnostic test(s). See DTC MESSAGES & CODES table under DIAGNOSTIC TROUBLE CODE DEFINITIONS. If all DTCs have been diagnosed, examine the following procedures. Perform the appropriate procedure.

After Component CODE Repair

Connect scan tool to data link connector. Ensure fuel tank is at least 1/4 full. Turn off all accessories. After ignition has been off for at least 10 seconds. Restart engine and run for 2 minutes. If starts since set and GOOD TRIP changed to one or more, repair is complete. Erase DTCs, then disconnect scan tool. If starts since set and GOOD TRIP did not change to one or more, observe scan tool for any other new DTCs. Perform appropriate diagnostic test(s). See DTC MESSAGES & CODES table under DIAGNOSTIC TROUBLE CODE DEFINITIONS.

Enter correct VIN and mileage in PCM. Erase codes for ABS and air bag modules.

Connect scan tool to Data Link Connector (DLC). Go to ENGINE, MISC. Using appropriate PIN code for this vehicle, place SKIM in Secured Access mode. Select UPDATE SECRET KEY DATA. Data will be transferred from SKIM to PCM. This is required for vehicle to start with new PCM.

If 3 attempts are made to enter secured access mode using an incorrect PIN, secured access mode will be locked out for one hour. To exit out of lock out mode, leave ignition key in RUN position for one hour. Ensure all accessories are turned off. Monitor battery state and connect a battery charger if necessary.