Fulltext TSBs

Technical Service Bulletins

TSB
01-13-6
  • DRIVEABILITY – CNG BI-FUEL – PARAMETER IDENTIFICATION DATA (PID) INPUT AND OUTPUT INFORMATION – VEHICLES EQUIPPED WITH 2.0L OR 5.4L CNG BI-FUEL ENGINE ONLY
Publication Date: JUNE 26, 2001

FORD:
1998-2000 CONTOUR
1998-1999 F-250 LD
1998-2001 E-250, E-350, F-150

ISSUE:

This article can be used as an overview of Bi-Fuel CNG vehicle Parameter Identification Data (PID), inputs and outputs as a diagnostic aid for the listed Bi-Fuel vehicles.

ACTION:

Refer to the Parameter Identification Data (PID) Input And Output Information Chart as an aid for diagnostics and the Switch-Over Code Chart for additional information.

SERVICE INFORMATION

Refer to the PID Information table and PID Input/Output diagram (Figure 1) as an aid for diagnostics.

PID INPUT AND OUTPUT INFORMATION
PID Sensor/ InputPID State – KOEOPID State – Hot Idle in Alt FuelPID – Units
ADPTCTL0.01.00 +/- 0.30 equivalent to long term fuel trim
ALTRFUNCounts up for total run time on alt fuelCounts up for total run time on alt fuelhours
BAROHRE13.5 to 15.0
NOTE: This will vary according to local altitude and weather conditions.
13.5 to 15.0psi
CL-COR0.00.70 to 1.30#
CLSD-LPNOYES
DELTMAP0.0- 7.5 to +7.5 (+ reading indicates that the throttle is opening and MAP is increasing, – reading indicates the reverse)psi
ECT-38 to 254175 to 254 (from PCM)degrees F
EGRFLW0.000.0
NOTE: Calculated EGR Flow. Will increase with increased EGR.
lbs/min
FRPREAB12 to 150 psia
NOTE: The minimum pressure to start on the alternative fuel is 96 psia for CNG. The minimum reading for a functional sensor with the inlet hose disconnected would be the same as BAROHRE.
75 to 130 psia
NOTE: Once the engine has started in Alt Fuel, it will continue to run until readings drop below 75 psia for F-Series CNG or 45 psia for Contour. Below this, the engine will auto-switch to gasoline.
psia
FRTMPAB-79 to 260-79 to 260
NOTE: Will vary dependent on ambient temperature, engine temperature, fuel temperature and fuel demand.
degrees F
FTP (F-Series, E-Series)0-36000-3600psi
FTP (Contour)0-30000-3000psi
FTTMP-40 to 248degrees F
FUELGAS/ALT
FUEL-MD01, 0301, gasoline, 02, in transition from Alt to Gasoline, 03, Alt Fuel#
GASFRUN0 to 65535Counts up for total run time on gasolinehours
HO2S0.01.0/.9
IGN-SWACCY, RUNRUN
IAT-38 to 254Varies according to ambient air temperature and underhood temperatures (from PCM).degrees F
MAF0.04.8 to 8.2lbs/min
MAP14.5
NOTE: KOEO, MAP reading should equal BAROHRE reading.
3 to 7
NOTE: Will vary according to engine speed and load.
psia
MIX-TMPAmbient-40 to 215degrees F
O2S110.00.1 to 0.9volts
O2S210.00.1 to 0.9volts
OPR-MDSTALL, RUNRUN
RPM0650 to 950 at idle
RUNTIME00 to 65535 (counts up from last start)seconds
SEL-SWGAS/ALTGAS/ALT
VBAT12 (batt volt)11.5 to 15.0
NOTE: This is the voltage as seen by the AFCM.
volts
VCLEXPNO/YESYES
VCLPRSNO/YESYES
VOL-EFF0.00.0 to 1.50%
CANVTDC%%
CAUSE00, 02, 03, 06, 07, 0800, 02, 03, 06, 07, 08
NOTE: Indicated switch-over cause. 00 = no switch-over requested. See following switch-over chart for complete list.
CCNT0 to 29Number of DTCs stored
FPLS10.00.01milli-seconds
FPLS20.00.01milli-seconds
GAS FPROFF/ONOff when running on Alt Fuel, On when running on gasolineNOTE: May not respond.
MFDES0.00Desired Mass Flow of Fuel. This will vary according to engine speed and load.lbs/min
SOFFSOLCLOSEDCLOSED
SPRKADD0.0# of degrees requested beyond normal PCM timing advance.degrees
TDCPASSONON
VLV #1CLOSEDOPEN/CLOSEDInjector Status
VLV #2CLOSEDCLOSEDInjector Status
VLV #3CLOSEDCLOSEDInjector Status
VLV #4CLOSEDCLOSEDInjector Status
VLV #5CLOSEDCLOSEDInjector Status
VLV #6CLOSEDCLOSEDInjector Status


SWITCH-OVER CODE CHART
Code #Switch-Over CauseDescription
00No switch-over requestedOn key on, Alt fuel has been selected and there is sufficient fuel to start and run on Alt Fuel.
02Low fuel absolute pressureWhile running on Alt Fuel, the pressure dropped below the minimum to run on Alt Fuel, resulting in a switch to gasoline.
03Requested by VCLVCL was unable to communicate with EEC to request Alt Fuel, therefore, switch to gas.
06Fuel absolute pressure time outFAP did not reach the minimum level within time limit on key up. Most likely cause, out of fuel before starting.
07Stall after auto-switchAfter auto-switching to gasoline, the engine has stalled. Therefore, if the engine is cranked without switching off the key, start on gasoline.
08No VCL communicationThe Compuvalve could not communicate with the VCL or VCLD.

OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Information Only

OASIS CODES:

490000, 602300, 603300, 608000, 609000, 611000, 623000, 690000, 698298




Figure 1 – Article 01-13-6


Copyright 2001 Ford Motor Company