Engine Controls - Diagnostic Methods -- 6.0L Diesel: Overview Ford Econoline E350 Super Duty

Overview

Diagnostic Methods provides detailed instructions on how to access or carry out routine diagnostic tasks. This article can be referenced as many times as needed for step-by-step instructions for routine procedures.

Quick Test Description

Quick Test is divided into 5 specialized tests

1. Retrieve/Clear Continuous diagnostic trouble codes (DTCs)
2. Key On Engine Off (KOEO) On-Demand Self-Test
3. Key On Engine Off (KOEO) Injector Electrical Self-Test (Click Test)
4. Key On Engine Running (KOER) On-Demand Self-Test
5. Key On Engine Running (KOER) Glow Plug Monitoring Self-Test

All are described below.

Quick Test checks the integrity and function of the powertrain control module (PCM) and outputs the test results upon demand. Quick Test also provides a quick end check of the powertrain control system and is usually carried out at the start of each diagnostic procedure. It is also carried out at the end of pinpoint tests for verification of repair and to make sure no other faults were incurred while repairing a previous fault.

Quick Test Operation

The Quick Test is carried out by retrieving the key on engine off (KOEO), key on engine running (KOER), and continuous memory diagnostic trouble codes (DTCs).

For all concerns, refer to the SYMPTOM CHARTS - 6.0L DIESEL . The Quick Test is carried out by retrieving KOEO, KOER, and continuous memory DTCs. If a DTC is retrieved, you must then go to the appropriate pinpoint test. If unable to complete the self-test, GO to Pinpoint Test AE .

Parameter Identification (PID)

The PID mode allows access to certain data values, analog and digital inputs and outputs, calculated values, and system status information. Throughout the manual, there are references to PID values. PID Data Monitor and Record can be accessed from the diagnostic tool through the Diagnostic Data Link menu.

Selecting Parameter Identification (PID)

Connect the diagnostic tool to the date link connector (DLC). Turn off all accessories. If the vehicle is equipped with a power take-off (PTO) system or auxiliary idle control, it must be turned off to carry out the self-tests.

1. Carry out the necessary vehicle preparation and visual inspection. Refer to «QUICK TEST OPERATION.»(ref-232983-S35877238962006052300000)
2. Refer to the manufacturer's manual for diagnostic tool instructions.
3. Follow the operating instructions from the menu.
4. Access and select the PIDs to begin monitoring.

Parameter Identification (PID) List

PARAMETER IDENTIFICATION LIST

DIAGNOSTIC TOOL - DRIVER-OPERATED CONTROLS CHECK REFERENCE

Description

All on board diagnostic (OBD) diagnostic tools should display the OSR Test. The OSR displays the supported monitors on the vehicle, the status of all monitors (complete or not complete), and the malfunction indicator lamp (MIL) status. If a monitor is not complete, the diagnostic tool will not identify the monitor that has not completed. Readiness for the 6.0L is reported based on the completeness of the comprehensive component monitors (CCM) and the misfire monitor and the exhaust gas recirculation (EGR) monitor. These monitors must be complete before readiness can be cleared.

Freeze frame data allows access to emission related values from specific generic parameter identification (PIDs). These values are stored the instant an emission related diagnostic trouble code (DTC) is stored in continuous memory. This provides a snapshot of the conditions that were present when the DTC was stored. Once one set of freeze frame data is stored, this data remains in memory even if another emission related DTC is stored. When a DTC associated with the freeze frame is erased or a keep alive memory (KAM) reset is carried out, new freeze frame data can be stored. In the event of multiple emission related DTCs in memory, always note the DTC for the freeze frame data.

FREEZE FRAME DATA TABLE

The clearing of continuous DTCs allows the diagnostic tool to command the PCM to clear/reset all emission-related diagnostic information. While carrying out this operation, a DTC P1000 will be stored in the PCM until all the OBD system monitors or components have been tested to satisfy a drive cycle without any other faults occurring. For additional information about a drive cycle, refer to ON-BOARD DIAGNOSTIC (OBD) DRIVE CYCLE . Clearing DTCs from the vehicle-specific continuous memory DTC menu clears all systems, including the OBD systems. Clearing DTCs from the OBD generic menu only clears OBD features for the 6.0L diesel.

The following events occur when the continuous DTCs and emission monitors information is cleared from the PCM

1. Clears the number of DTCs.
2. Clears the DTCs.
3. Clears the freeze frame data.
4. Resets the status of the OBD system monitors.
5. Sets DTC P1000 as a vehicle-specific DTC. P1000 does not appear as an OBD DTC.

Refer to the manufacturer's manual for diagnostic tool instructions.

Resetting the KAM returns the powertrain control module (PCM) memory to its default setting. Adaptive learning contents such as idle speed and refueling event are included. To clear continuous diagnostic trouble codes (DTCs) in the PCM and have it reset the emissions monitors information is also part of a KAM reset. Refer to CLEAR THE CONTINUOUS DIAGNOSTIC TROUBLE CODES (DTCS) AND RESET THE EMISSION MONITORS INFORMATION IN THE POWERTRAIN CONTROL MODULE (PCM) . Both can be useful in post repair retest.

After the KAM has been reset, the vehicle may exhibit certain driveability concerns. It is necessary to drive the vehicle to allow the PCM to relearn the values for optimum driveability and performance.

This function may not be supported by all diagnostic tools. Refer to the diagnostic tool manufacturer's instruction manual.

If an error message is received or the diagnostic tool does not support this function, disconnecting the battery ground cable for a minimum of 5 minutes may be used as an alternative procedure.

After the KAM has been reset, DTC P1000 is stored in the PCM. If the battery ground cable was disconnected to reset the KAM, DTCs P0603 or P1603 are also present.

Flash EEPROM is contained in an integrated circuit (IC) internal to the powertrain control module (PCM) and the fuel injection control module (FICM). The flash EEPROM contains the vehicle strategy, including calibration information specific to the vehicle, and is capable of being reprogrammed or reflashed repeatedly.

As part of the calibration there is an area referred to as the vehicle identification (VID) block in the PCM. The VID block must be programmed when replacing the PCM as described under Programming the VID Block for a Replacement PCM. Failure to carry out this procedure may generate fault codes: P1635, P1639, VID Block not programmed or is corrupt. The VID block in an existing PCM can also be tailored to accommodate various hardware/parameter changes made to the vehicle since production. Failure to carry out this procedure properly may generate fault code P1635, Tire/Axle Ratio out of Acceptable Range, is one of the main causes for code P1639. This is described under Making Changes to the VID Block, and also under Making Changes to the PCM Calibration. The VID block contains many items used by the strategy for a variety of functions. Some of these items include the VIN number, octane adjust, fuel octane, fuel type, vehicle speed limit, tire size, axle ratio, the presence of speed control, and four wheel drive electronic shift-on-the-fly versus manual shift-on-the-fly. Only items applicable to the vehicle hardware and supported by the VID block are displayed on the diagnostic tool.

When changing items in the VID block, the strategy places range limits on certain items such as tire and axle ratio. The VID block is also limited to the number of times it can be reconfigured. When this limit is reached, the diagnostic tool displays a message indicating the need to flash the PCM again to reset the VID block.

Each of the procedures described below use the Worldwide Diagnostic System (WDS). Reprogramming can be carried out by a local Ford dealer for any non-Ford facility. There are other enhanced diagnostic tools that may have reprogramming capabilities available. Refer to the manufacturer's manual for details.

Note. Vehicles equipped with power take-off (PTO) or auxiliary idle control must have that system disengaged before the OBD drive cycle is initiated.

The primary intention of the OBD drive cycle is to clear the DTC P1000 and to satisfy the specifications for the Society of Automotive Engineers (SAE) specification J1979. Each OBD monitor must run during the drive cycle.

If the drive cycle is completed and P1000 is not cleared, repeat the entire drive cycle. If a particular step is interrupted, simply repeat the drive mode. If the drive cycle is interrupted with a key-off, only drive modes that were incomplete must be run.

Rough road conditions may prevent certain steady state conditions and steady accelerations from validating the transmission and load-related monitors.

OBD Parameter Identification (PID) Data Monitor

The PID monitor for OBD offers real time evaluation of several emission-related parameters. The only parameters that apply to 6.0L diesel applications are diagnostic trouble code count (DTC CNT), manifold absolute pressure (MAP), malfunction indicator lamp (MIL), revolutions per minute (RPM), and vehicle speed sensor (VSS).

Basic circuit checks help to minimize pinpoint test steps by providing a procedure to diagnose harness faults associated with the electronic engine control (EEC) system. The following techniques provide helpful reminders for diagnosing open circuits (continuity), shorts to ground, and shorts to voltage.