UI BULLETIN # 46 Rev. 1
Contents
1. Selection BULLZYS 46 Rev 1 9 of 12 3 16 2001 Rev 1 6 20 2001 UI BULLETIN 46 Rev 1 C ont d FITER ATTACHMENT 1 PAGE 5 Tech 2 Powertrain Screen Powertrain FO F1 Data Display F2 Special Functions F3 Snapshot F4 FSi as Selection Tech 2 Special Functions Screen Special Functions Service Bay Test F7 PTO Options F8 Engine Shutdown F9 Selection BULLZYS 46 Rev 1 10 of 12 3 16 2001 Rev 1 6 20 2001 GM UI BULLETIN 46 Rev 1 FIJE Cont d ATTACHMENT 1 PAGE 6 Fast Idle Mode Settings Display PTO Option Current PTO Settings PTO Fast Idle Option Fast Idle PTO Max Engine Speed XXXX RPM PTO Standby Speed XXXX RPM PTO Max Engage Speed XXXX RPM PTO Engine Shutdown No PTO Engage Relay No PTO Feedback No Note No changes can be made to this screen Press change options to get to the next Change menu Options Selection PTO Operating Modes Screen PTO Option FO Fast Idle F1 Preset PTO Speed Control F2 Variable PTO Speed Control Selection BULLZYS 46 Rev 1 11 of 12 3 16 2001 Rev 1 6 20 2001 UI BULLETIN 46 Rev 1 E FIJE Cont d ATTACHMENT 1 PAGE 7 Fast Idle Mode Settings Update Screen PTO Options Fast Idle Option PTO Fast Idle Option Fast Idle PTO Max Engine Speed XXXX RPM PTO Standby Speed XXXX RPM PTO Max Engage Speed XXXX RPM PTO Engine Shutdown No PTO En2. UI BULLETIN 46 Rev 1 El A FHT TE SUBJECT G Van High Idle MODELS AFFECTED G Full Bodied Vans and Cutaways w 8 1L Engine RPO L18 MODEL YEAR S 2001 DATE 3 16 2001 REVISION DATE 6 20 2001 PAGE lofl2 ADVISORY This is a revision to Upfitter Integration bulletin number 46 dated 3 16 01 to advise of a change to the wiring schematic of the high idle switch the operation of the high idle and the procedure to adjust rpm speed of the high idle The purpose of this bulletin is to provide Upfitters and Special Vehicle Manufacturers SVMs with information regarding high idle availability This bulletin also provides installation in structions to interface with the new high idle calibrations now available Upfitter Integration suggests the following procedures be followed carefully if your applica tion requires a high idle feature for any 2001 G Van or Cutaway equipped with the 8 1L RPO L18 engine Condition Some Upfitters and SVMs are requesting high idle capabilities for 2001 G vans or Cutaways equipped with the 8 1L engine High idle refers to the increase in engine rpm to values higher than normal base idle speed High idle historically has been provided through additional mechanical hardware to regulate an increased engine rpm speed Cause The high idle calibrations were not included in the original production PCM calibrations for 2001 The 2001 model year G Vans equipped with the 8 1L engine differ from their predec
3. Kent Moore Tools phone number 800 345 2233 This repair kit contains instructions tools and terminal ends for making wiring repairs and adding circuits In addition Packard electrical components may be obtained from a GM dealer or from Pioneer Standard Co phone number 800 PACKARD Installation Instructions Refer to Figure 1 for the revised wiring schematic for the installation of the momentary switch and the relay The relay may be mounted under the dash or in the underhood BEC located above the driver s side inner wheel well The location of the mounted switch the relay and the routing of the wiring harness may differ depending on upfitter needs and requirements P rop erly seal all connections and carefully secure the harness using tie straps to ensure proper routing and adequate clearance to prevent wiring chaffing and subsequent damage This new wiring schematic with the addition of the relay is different from the wiring sche matic in Upfitter Integration bulletin 46 dated 3 16 01 The addition of the relay and wiring the relay to the Neutral Start Back Up NSBU switch mounted on the transmission will allow the high idle to be engaged only when the transmission selector is in the PARK position The NSBU is closed and will complete the circuit only when the transmission selector is in the PARK position Note Refer to the appropriate section of the 2001 G van Service Manual for the PCM removal installation procedures and PCM
4. are represented with dashed lines and solid arrow heads BULLZYS 46 Rev 1 5 of 12 3 16 2001 Rev 1 6 20 2001 UI BULLETIN 46 Rev 1 El CFFTTER Cont d ATTACHMENT 1 PAGE 1 2001 G Van High Idle Adjustment Procedure Tech 2 Menu Screens BULLZYS 46 Rev 1 6 of 12 3 16 2001 Rev 1 6 20 2001 UI BULLETIN 46 Rev 1 El CFITTER Cont d ATTACHMENT 1 PAGE 2 Tech 2 Main Menu Screen Diagnostics Service Programming System View Captured Data Selection Tech 2 Vehicle ID Screen Vehicle ID Model Years Selection BULLZYS 46 Rev 1 7 of 12 3 16 2001 Rev 1 6 20 2001 UI BULLETIN 46 Rev 1 El A FIJ JE Cont d ATTACHMENT 1 PAGE 3 Tech 2 Vehicle ID Screen Passenger Car LD Truck MPV Incomplete Medium Duty Truck Saturn Selection Tech 2 System Selection Screen System Selection Menu 1 2001 LD Truck Powertrain Body Chassis Diagnostic Circuit Check Selection BULLZYS 46 Rev 1 8 of 12 3 16 2001 Rev 1 6 20 2001 UI BULLETIN 46 Rev 1 El A FIJ JE Cont d ATTACHMENT 1 PAGE 4 Tech 2 Vehicle ID Screen Vehicle ID Select one of the following LD Truck Engine types 1 V8 LB7 Diesel G V8 L18 8 1 L G V8 L18 3500HD Selection Tech 2 Vehicle ID Screen Vehicle Identification Select one of the following Transmissions 5 Speed Automatic Trans 4 Speed Automatic Trans Manual Trans Other
5. connector pinout identification as well as the underhood BEC locations BULLZYS 46 Rev 1 3 of 12 3 16 2001 Rev 1 6 20 2001 UI BULLETIN 46 Rev 1 El A FIJ TE Cont d Selecting and adjusting the high idle rpm The high idle feature of the new calibration is adjustable to meet the various needs of indi vidual upfitters and SVMs The default value of the high idle rom is 800 rpm The high idle rpm is adjustable in 50 rpm increments from a minimum value of 800 rpm to a maximum of 1300 rpm To adjust the high idle rom the GM Tech 2 scan tool must be used Refer to Attachment 1 2001 G Van High Idle Adjustment Procedure Tech 2 Menu Screens for the necessary steps and screen Selections to properly adjust the desired high idle rpm The following chart may be used as a guideline to determine the desired resultant high idle rpm based on the current output of the generator at various engine rpm BULLZYS 46 Rev 1 4 of 12 3 16 2001 Rev 1 6 20 2001 UI BULLETIN 46 Rev 1 E FIJ JE Cont d Closed only in Park U A nderhood BEC Locations PCM 139 ENG part of NSBU PNK Switch Fast Idle Switch RELAY FAST IDLE SWITCH 1 0 Jl 12129840 normally open Jl i i h Prs eean i A9 451 ENG JI B BLK WHT 0 8 275 ENG GRN LT 534 ENG 0 5 2 GRN DK 275 ENG 0 8 SEE GRN Lee BIK 7 nsi 0 5 ja INLINE TO IP connector 12176348 mas mii cavity A3 Notes The NEW splice wires and relay
6. following additional parts to allow the end user to activate the high idle feature Momentary switch either push button or lever type Quantity of 1 required Relay GM part number 12088567 or equivalent GM relay is available through service parts from a GM dealer Quantity of 1 required Relay connector Delphi Packard part number 12110541 Quantity of 1 required recommended if relay is to be mounted under dash Refer to Delphi Packard Handbook for appropriate mating terminal ends and secondary locks Suitable electrical wire Length and quantity dependent on switch and relay location E quivalent Relay Specifications Relay Type Normally Open Voltage 10 to 16 Volts DC ContactCurrentRating 20 Amps Maximum Optional parts if relay is to be installed in the underhood bussed electrical center BEC Terminal end part number 12110844 for cavities B7 and A9 Quantity of 2 required Terminal end part number 12110843 for cavities B9 and A7 Quantity of 2 required Note If the relay is installed in the underhood BEC it is recommended that the location of the high idle relay be noted on the BEC label BULLZYS 46 Rev 1 2 of 12 3 16 2001 Rev 1 6 20 2001 UI BULLETIN 46 Rev 1 El A FIJ TE Cont d Parts List cont To maintain electrical system reliability and durability it is recommended to use the Packard Electric wiring repair kit part number J 38125 B or 38125 500 which is available through
7. es sors Various engine functions including idle speed are now controlled through electronic means due to the incorporation of an electronically controlled throttle versus a mechanically controlled throttle Correction The new calibration which includes the high idle feature can be programmed into the PCM with a GM Tech 2 scan tool The GM Tech 2 scan tool connects to the data link connector under the dash above the driver s foot well area The Tech 2 scan tool MUST be used to enable the high idle option and adjust the factory default settings to the desired high idle rpm UI BULLETIN 46 Rev 1 El A FIJ TE Cont d Correction cont A GM dealer will be able to perform the reprogramming of the PCM A Vehicle Identification Number VIN will be required by the dealer to change the calibration The dealer must call GM Techline Customer Assistance at 800 828 6860 for a VCI authorization number to access and obtain the calibration Once the dealer performs the reflash of the PCM the GM vehicle build record will be updated to reflect the new calibration in the vehicle Calibration Part Numbers The new calibration part numbers which include the high idle feature are as follows 9373572 All Federal Emission Applications Models 05 06 03 32 and California Emission Applications Models 03 32 9373573 California Emission Applications Models 05 06 Parts List Upfitters or SVMs requiring the high idle feature will need to install the
8. gage Relay No PTO Feedback No Press Reprogram Options when done Selection Then scroll Decrease Increase ee to change high idle rpm setting ecrease g oncrease puons BULLZYS 46 Rev 1 12 of 12 3 16 2001 Rev 1 6 20 2001
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