InterMotive AFIS420VSX-B Manuale utente
InterMotive Inc.
12840 Earhart Avenue
Auburn, CA 95602
Phone: (5 0) 82 -1048
Fax: (5 0) 82 -1516
Page 1 of 6
www.intermotive.net
AFIS420VSX-B-021 18-INS
Introduction
The AFIS420VSX-B is a Fast Idle system that elevates engine idle RPM based on a number of “triggers”.
The vehicle must be in Park for Fast Idle to engage. There are three different engine RPM settings which
can be selected by grounding different control inputs. The three different RPM values can be independently
set during installation.
An ISO 9001:2008 Registered Company
Options
AFIS420VSX-B — Single OBDII connector Data Link Harness
AFIS420VSX-BP — Two connector “T” Data Link harness
AFIS420VSX-BIP — Two connector white panel mount “T” Data Link harness
AFIS420-VSX-BW — Input 1 default speed is: 1500—RPM Gas/1500—RPM Diesel
Installation Instructions
Disconnect vehicle battery before proceeding with installation.
AFIS420 SX-B Module
Remove the lower dash panel below the steering column area and find a suitable location to mount the
AFIS420VSX-B module. Locate the module in an area away from any external heat sources (engine heat,
heater ducts, etc.). Do not actually mount the module until all wire harnesses are routed and secure. The
last step will be to mount the module.
IMPORTANT—READ BEFORE INSTALLATION
It is the installer’s responsibility to route and secure all wiring harnesses where they cannot be damaged
by sharp objects, mechanical moving parts and high heat sources. Failure to do so could result in damage
to the system or vehicle and create possible safety concerns for the operator and passengers.
Avoid placing the module where it could encounter strong magnetic fields from high current cabling
connected to motors, solenoids, etc. Avoid radio frequency energy from antennas or inverters next to
the module. Avoid high voltage spikes in vehicle wiring by always using diode clamped relays when
installing upfitter circuits.
AFIS420 SX-B Fast Idle System
2009-2018 Ford E-Series, all engines
2009-2010 Ford F-250 - F-550, all engines
2014-2018 Ford F53/F59, 6.8L engine
2014-2016 Ford Transit Connect
2009-2017 Chevrolet Express / GMC Savana
2015-2017 Chevrolet Silverado / Sierra
2011-2014 American General M -1 4.6L
2016-2017 Isuzu NPR
AFIS420 SX-B Data Link Harness
1. Locate the vehicle’s OBDII Data Link Connector which is mounted below the lower
left dash panel.
2. Plug the Red connector from the AFIS420VSX-B Data Link Harness into the vehicle
OBDII connector. Ensure the connection is fully seated and secure with the supplied
wire tie.
. Secure the AFIS420VSX-B Data Link harness so that it does not hang below the
lower dash and plug the (4-pin connector) from the Data Link Harness into the
4-Pin connector on the AFIS420VSX-B module.
AFIS420 SX-BP/BIP “T” Data Link Harness
1. Locate the vehicle OBDII Data Link Connector. It will be mounted below the lower left
dash panel.
2. Remove the mounting screws for the OBDII connector. Plug the Red connector from
the AFIS420VSX-BP Data Link Harness into the vehicle’s OBDII connector. Ensure the
connection is fully seated and secure with the supplied wire tie.
. Mount the Black pass through connector from the AFIS420VSX-BP Data Link Harness in
the former location of the vehicle’s OBDII connector.
4. Secure the AFIS420VSXP-B Data Link harness so that it does not hang below the lower dash
and plug the 4-pin connector from the Data Link Harness into the 4-Pin connector on the
AFIS420VSX-B module.
AFIS Harness (8-Pin Connector) - Fast Idle Engage Inputs
Engage Input 1
Attach the AFIS Harness connector Pin #8 Green wire to any equipment that provides a ground signal when the
fast idle needs to be engaged. (PTO, pump, etc….)
Note: The “sense” of the Green wire can be programmed (see below). This alternatively allows equipment
which provides a 12V “active” signal to be connected to this input.
Engage Input 2
Attach the AFIS Harness connector Pin #7 White wire to any equipment that provides a ground signal when the
fast idle needs to be engaged. (PTO, pump, etc….)
Engage Input 3
Attach the AFIS Harness connector Pin #5 Yellow wire to any equipment that provides a ground signal when
the fast idle needs to be engaged. (PTO, pump, etc….)
If multiple engage inputs are active, the lower number has priority. Auto triggers will have the lowest priority
and will only trigger if none of the inputs are active.
InterMotive Inc.
12840 Earhart Avenue
Auburn, CA 95602
Phone: (5 0) 82 -1048
Fax: (5 0) 82 -1516
Page 2 of 6
www.intermotive.net
AFIS420VSX-B-021 18-INS
Engage Input 1—Fast Idle Pin-8 Trigger, Active: Ground or 12 signal Enable/Disable
The module is configured from the factory for an active ground fast idle trigger. To change this to an active
12V trigger:
Turn the key on, place the transmission in neutral, apply the Service Brake, pull out on the Park Brake release
and apply the Park Brake four times within 5 seconds. Upon successful reprogramming, the LEDs will flash as
a confirmation. The user must cycle the key for the change to take affect. Repeat to reverse back to a
ground trigger.
BAT Low Fast Idle Trigger Disable, Black wire loop
The system is configured from the factory for Fast Idle to be triggered when the
battery voltage (VBAT) drops below 12.5V. If the VBAT Low Fast Idle Trigger is not
needed, it can be disabled by cutting the Black wire (loop) on the 8-Pin connector
between Pin #1 & Pin # .
Configurable Idle Speed (Gray wire)
The AFIS420VSX-B allows the user to change the fast idle RPM for each fast idle input during installation.
Any speed can be selected between 900 RPM and 2000 RPM in 50 RPM increments when reconfiguring. The
default speeds are as follows:
• Input 1—1500 RPM Gas/1200 RPM Diesel
• Input 2—1750 RPM Gas/1000 RPM Diesel
• Input —950 RPM Gas/900 RPM Diesel
1. Locate the Gray wire Pin 4 in the 8 pin Molex connector.
2. Pull the wire out of the loom to expose the bare copper end.
. Place the vehicle in Fast Idle by grounding the selected Engage Input wire. Only the
active idle input will be adjusted. NOTE: With the engine in Fast Idle, momentarily
grounding the Gray wire (RPM Configuration input) increases the idle speed by 50 RPM.
When the idle speed reaches the maximum allowable speed for the particular engine,
it will roll back to approximately 900 RPM. Wherever the user stops, this RPM becomes
the new default Fast Idle speed, even through key cycles.
4. Repeat this operation for each of the three Engage Input wires as desired.
5. After the vehicle is set to the desired fast idle speeds, insert the end of the Gray wire into the harness
tubing and use tape to secure.
All Auto Triggers (VBAT and PB) share the same idle speed configuration as Input 1. Input 1 idle speed
can also be reconfigured when in one of these triggers.
AFIS420 SX-BW option
The AFIS420VSX-BW is identical to the AFIS420VSX-B except that Input 1’s default speed is:
• 1500—RPM Gas/1500—RPM Diesel
InterMotive Inc.
12840 Earhart Avenue
Auburn, CA 95602
Phone: (5 0) 82 -1048
Fax: (5 0) 82 -1516
Page of 6
www.intermotive.net
AFIS420VSX-B-021 18-INS
Park Brake Fast Idle Trigger Enable/Disable
The AFIS420-VSX-B module is configured from the factory for Fast Idle not to be triggered when the Park
Brake is applied. If the Park Brake Fast Idle trigger is needed, it can be enabled (or disabled) by the following
procedure:
1. With key on, place the transmission in neutral.
2. Apply the Park Brake and press the Service Brake three times within 5 seconds.
Upon successful reprogramming, the on-board LEDs will briefly flash as a confirmation. Cycle the key for the
change to take affect.
Post Installation System Operation Test
Perform the following tests before mounting the module, to allow viewing of the diagnostic LED’s, if needed.
1. Place transmission in Park and start the engine. Note: Vehicle may enter Fast Idle if Battery Voltage
(VBAT) is low. Either wait to see if the battery charges and Fast Idle stops, or place a charger on the
vehicle to disable the VBAT low trigger to allow testing of other triggers.
2. If the Parking Brake Fast Idle trigger is enabled, apply the Parking Brake. The engine speed will increase to
the set RPM level. Release the Parking Brake. Verify the system comes out of Fast Idle
. One at a time, manually engage all three Fast Idle Inputs by having aftermarket vehicle equipment ground
the Input wires. Engine speed will increase to the set RPM level.
4. If this does not occur, check harness connections. Also, see diagnostics below.
5. While Fast Idle engaged, keep the Input wire grounded, and depress the Service Brake for 1 second.
Fast idle will temporarily disengage anytime the Service Brake is depressed, but will automatically
reengage after approximately 2 seconds once the Brake pedal is released.
6. Place transmission shift lever in the “Neutral” position. (Input wire still grounded). The system must not
activate Fast Idle.
The AFIS420VSX-B is properly installed only if it passes all of the above steps.
Module Mounting
Ensure all harnesses are properly connected and routed, and are not hanging below the dash area. Mount the
AFIS420VSX-B module using screws or double sided tape and reinstall all removed panels
LED # Diagnostic Mode LED Descriptions
1 On when fast idle is engaged
2 On when any input trigger wire is active
On when Gray RPM set wire is grounded
4 On when the Parking Brake is applied with the parking brake
trigger enabled
STATUS Continuously flashes two digit status codes. See Status Code
table
Diagnostics
Diagnostic mode is entered by
momentarily shorting the two gold
“Test” pads together on the module.
The module provides diagnostic LEDs
which illuminate according to the
following table. To exit this mode,
cycle the key or momentarily ground
the “Test” pad again.
AFIS Status Codes
Status Code Description
1-1 Ready for fast idle
2- Triggered: Parking Brake
2-4 Triggered: VBAT Low
2-7 Triggered: Engage Input 2
2-8 Triggered: Engage Input 1
2-9 Triggered: Engage Input
-1 RPM > 2800
-2 RPM < 200
- TR not = to PARK
-4 VSS not = to 0 MPH
-5 Service Brake applied
-7 Unsafe; Need to cycle TR
-8 ECT > 2 0ºF
Fast Idle Status Codes
Status Codes provide the current status of
the Fast Idle system. The on-board
“Status” LED will flash a 2-digit code as
shown in the table. The first digit will flash,
wait half a second, flash the second digit,
then wait one second before the next
code. The Status Codes continue to flash
until the module is reset (cycle key), or the
test input is momentarily grounded again.
InterMotive Inc.
12840 Earhart Avenue
Auburn, CA 95602
Phone: (5 0) 82 -1048
Fax: (5 0) 82 -1516
Page 4 of 6
www.intermotive.net
AFIS420VSX-B-021 18-INS
LEA E IN EHICLE
Operating Instructions AFIS420 SX-B
2009-2017 Ford E-Series, all engines
2009-2010 Ford F-250 - F-550, all engines
2014-2018 Ford F53/F59, 6.8L engine
2014-2016 Ford Transit Connect
2009-2017 Chevrolet Express / GMC Savana
2015-2017 Chevrolet Silverado / Sierra
2011-2014 American General M -1 4.6L
2016-2017 Isuzu NPR
Fast Idle Preconditions
All of the following preconditions must be met prior to initiating Fast Idle operation.
• Vehicle speed zero
• Transmission in Park
• Accelerator pedal not applied
• Engine Coolant temperature must be less than 2 0ºF
• Engine RPM must be greater than 200 and less than 2800.
• Service Brake not applied
The following options are configurable at the factory for OEM customers. The default values are shown.
System Operation
The Advanced Fast Idle System (AFIS) elevates engine idle speed in response to a number of triggers in order
to assist electrical or mechanical systems on the vehicle.
Fast Idle may be initiated by either a manual trigger (Input wire being grounded), a low battery voltage
(low VBAT) condition, or if enabled, by setting the Park Brake.
Fast Idle will only occur when the required preconditions are met, as listed below. Fast Idle operation will
be terminated by a loss of any of the preconditions, or removal of the trigger(s).
Fast Idle Triggers
Trigger Name Trigger Conditions Disable Conditions
Manual Engage Fast Idle Engage Green wire grounded
Or 12V input enabled (based on setting)
Fast Idle Engage Green wire not grounded
Or not 12V (based on setting)
VBAT Low VBAT < 12.5V Precondition Violation
Parking Brake Parking Brake applied (If Enabled) Parking Brake Released
AFIS420 SX-B
Input 1: 1500 gas / 1200 Diesel
Input 2: 1750 gas / 1000 Diesel
Input : 950 gas / 900 Diesel
VBAT Low: 12.5V
Parking Brake Trigger: Disabled
An ISO 9001:2008 Registered Company
AFIS420 SX-BW
Identical to AFIS420VSX-B except:
Input 1: 1500 gas / 1500 Diesel
InterMotive Inc.
12840 Earhart Avenue
Auburn, CA 95602
Phone: (5 0) 82 -1048
Fax: (5 0) 82 -1516
Page 5 of 6
www.intermotive.net
AFIS420VSX-B-021 18-INS
Submit product registration at www.intermotive.net
If the AFIS420VSX-B fails any step in the Post Installation Test, review the installation instructions and check all connections.
If necessary, call InterMotive Technical Support at (5 0) 82 -1048.
AFIS420VSX-B-021 18 CAD
Page 6 of 6
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