Engine Controls - Diagnostic Test Plan Update
SI B 12 18 05Engine Electrical Systems
May 2008
Technical Service
This Service Information bulletin supersedes S.I. B12 18 05 dated October 2006.
[NEW] designates changes to this revision
SUBJECT
N62 and N62TU Engine Diagnosis Test Plan Updates
MODEL
E53 (X5 4.4i, 4.8is)
E60 (545i, 550i)
E63 (645Ci, 650Ci)
E64 (645Cic, 650Cic)
E65 (745i, 750i)
E66 (745Li, 750Li)
[NEW} E70 (X5 4.8i)
INFORMATION
This bulletin provides diagnostic tips for using the following Test Plans within the DIS and GT1 diagnostic software.
^ Ignition and Injection Diagnosis N62
^ N62 Compression Test
^ Smooth Running Test
^ N62 Minimum Valve Lift Adjustment
^ Eccentric Shaft Calibration
^ Learning Valvetronic Limit Positions
^ Tolerance Test, Intermediate Lever
Whenever performing the above system tests or adjustments it is always a good practice to retain a hardcopy of the test results or adjustment in the vehicle hardcopy file.
[NEW] Manual Identification:
Vehicles equipped with the N62TU engine require manual identification prior to connecting the diagnostic head to the vehicle when using D53.0 or higher. For example, if the vehicle is a 750Li then identify the vehicle as a 745Li. Using the table below will aid the identification process
Manual Identification Procedure (Diagnostic Head disconnected):
1. Select "7 series and E65" then arrow to the right
2. Select "Cancel" in the dialog box
3. Is battery voltage OK? Select "OK"
4. The diagnosis connection is not OK? Select "OK"
5. Type of vehicle identification? Select "Manual"
6. Select "745Li, USA and 2004_9". Always select the newest production date of the N62 vehicle being tested.
7. When the vehicle identification screen appears without a VIN number displayed connect the Diagnostic Head to the vehicle. Wait for the Diagnostic Head to establish a connection to the diagnostic device before proceeding to the desired Test Plan.
[NEW] Ignition and Injection Diagnosis N62 and N62TU:
Vehicles equipped with N62 and N62TU engines can no longer be diagnosed using Special Tool 12 1 310 Multi-Channel Adaptor (MKA) due to changes in the diagnostic software.
N62 Compression Test:
Used to evaluate unequal cylinder fill levels. The compression is tested first at minimum lift and if found to be uneven the test plan will automatically advise a compression test at maximum valve lift. The
test requires the use of the Special Tool 11 8 490 Adaptor Probe in conjunction with the 25 Bar Pressure Transducer. This test can be performed using the DIS Plus or GT1 with MIB.
Engine Temperature Requirement: Can only be performed at between 50-80° Celsius.
The Test Plan can be found using the following paths depending on engine application:
N62 Vehicles
Function Selection Service Functions Drive Engine Management ME9 Test Runs Idling Quality Compression Test.
N62TU Vehicles
Manual Vehicle Identification Required.
Function Selection Service Functions Drive Engine Management ME9 Test Runs Idling Quality Compression Test.
Smooth Running Test:
Used to evaluate engine smoothness by comparing individual cylinders when engine roughness has not exceeded the misfire threshold. The test can be performed using the DIS Plus or GT1 with MIB.
Engine Temperature Requirement: The test can only be activated after the electric cooling fan has cycled on one time. Engine temperature will need to achieve 102° Celsius.
The Test Plan can be found using the following paths depending on engine application:
N62 Vehicles
Function Selection Service Functions Drive Engine Management ME9 Test Runs Idling
Quality Smooth Running Test.
N62TU Vehicles
Manual Vehicle Identification Required.
Function Selection Service Functions Drive Engine Management ME9 Test Runs Idling
Quality Smooth Running Test.
N62 Minimum Valve Lift Adjustment (Minimum Stroke Adjustment):
Used to compensate for engine rough idling a normal operating temperature. The Test Plan adjusts the valve lift at idle from 0.3mm to 0.8mm further refining the Valvetronic adaptation. This adjustment can be performed using the DIS Plus or GT1 with MIB.
Engine Temperature Requirement: Can only be performed at greater than or equal to 80° Celsius. minimum.
The Test Plan can be found using the following path:
Function Selection Service Functions Drive Engine Management ME9 Calibrations Minimum Stroke Adjustment.
Note:
The Minimum Lift Adjustment should not be performed on any N62 equipped X5 vehicles.
Eccentric Shaft Calibration:
Used to compare and calibrate the smooth running values of the two cylinder banks. This calibration is a bank-to-bank comparison that does not affect individual cylinders. This adjustment must be performed anytime disassembly and reassembly of the Valvetronic System has occurred. The test can be performed using the DIS Plus or GT1 with MIB.
Engine Temperature Requirement: No requirement
The Test Plan can be found using the following paths depending on engine application:
N62 Vehicles
Function Selection Service Functions Drive Engine Management ME9 Test Runs Idling Quality Eccentric Shaft Calibration.
N62TU Vehicles
Function Selection Service Functions Drive Engine Management ME9 Test Runs Idling Quality Eccentric Shaft Calibration.
Learning Valvetronic Limit Positions:
Used to calibrate correct valve opening height by balancing the valve gear. This adjustment must be performed anytime disassembly and reassembly of the Valvetronic System has occurred. The test can be
performed using the DIS Plus or GT1 with MIB.
Engine Temperature Requirement: No requirement.
The Test Plan can be found using the following path:
Function Selection Service Functions Drive Engine Management ME9 Calibrations Learning Valve Limit Positions.
Tolerance Test, Intermediate Lever Test:
During cold start the engine may run rough for a short period of time and store misfire faults in DME Memory. Automatically determines proper tolerance of the Valvetronic intermediate levers, refer SI B11 02 05 for complete details. The test can be performed using the DIS Plus or GT1 with MIB.
Engine Temperature Requirement: Can only be performed at less than or equal to 30° Celsius.
The Test Plan can be found using the following path:
Function Selection Service Functions Drive Engine Management ME9 Test Runs Tolerance Test, Intermediate Lever.
Refer to ST501 New Engine Technology and DIS Function Description for further information.
This bulletin will be updated whenever new diagnostic information is available. Suggestions can be submitted via a PuMA QC Info to the Drivetrain Group.
WARRANTY INFORMATION
Information only
Disclaimer