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Remote Engine Start Neutral Safety Switch Bulletin

A neutral safety switch is a mechanism on almost every vehicle equipped with 
an automatic transmission. The neutral safety switch prevents the vehicle from 
starting while the gear shift selector is in "Reverse" or "Forward" gear positions.

There are basically two types of neutral safety switches. The most common is
the mechanical (separate) neutral safety switch. A small group of vehicles use
a combined neutral safety switch.

Type "A" (separate)

The mechanical neutral safety switch is located between the ignition switch
and the starter solenoid. The starter wire runs directly from the back of the
ignition switch to the neutral safety switch and then to the starter solenoid.
When adding a remote engine starter, make starter wire connections as close
to the ignition switch as possible to ensure your connections are between the
ignition switch and the neutral safety switch.

Type "B" (combined)

Some vehicles combine the neutral safety switch and the steering column shift 
mechanism together. The starter wires run from the "combined" switch directly 
to the starter solenoid. The remote start wire connection cannot be made
between the ignition switch and the neutral safety switch. As a result, if the
vehicle was left in gear with the key in the ignition and not in the locked
position, the vehicle could move forward or backward if a remote start
attempt was made.

The combined  type neutral safety switch requires an additional relay to
prevent the vehicle from remote starting while the key is in the ignition. Use
the attached test procedure and relay wiring diagrams. Install the complete
remote start unit and test all safety features before conducting the test
procedure.

Currently, the only vehicles with the combined  neutral safety switch that
Avital is aware of are General Motors trucks, GM sport utility vehicles, GM
column shift passenger cars and Dodge Dakota pickup trucks. There may be
additional vehicles with the combined neutral safety switch that require the
additional relay.

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AviStart 2501 Installation Manual - Rev. B 100199

Summary of Contents for AviStart 2501

Page 1: ...AviStart 2501 Installation Manual Rev B 100199 ...

Page 2: ...AviStart 2501 Installation Manual Rev B 100199 ...

Page 3: ...Parking Lights 6 Glow Plug Light Input 6 Reverse Light 7 Remote Start Activated Output 7 Factory Alarm Disarm Output 7 Factory Alarm Rearm 8 Ignition Switch Connections 8 Remote Engine Start Neutral Safety Switch Bulletin 1 0 Tach Wire RPM Monitoring 1 3 Hood Switch Mandatory 1 3 Power and Ground Connections 1 4 Mandatory RPM Programming 1 4 Programmable Features 1 5 Programming Table for System F...

Page 4: ...ires from the control unit directly to the battery 4 Keep extensions as short as possible Use same gauge wires for short extensions and larger gauge wires for longer extensions 5 DO NOT disconnect the battery cables Make all connections by removing the bolts from the cable clamps without detaching the clamp 6 Turn off dome light or remove dome light fuse to prevent battery drain This device compli...

Page 5: ...3 AviStart 2501 Installation Manual Rev B 100199 Main Wiring Diagram ...

Page 6: ...W BLACK Reverse Light Input 9 TAN Hood Switch Input 10 RED BLACK Parking Light Output 11 GRAY BLACK Remote Start Activated Output 12 GRAY WHITE Factory Alarm Disarm Output 13 RED WHITE Parking Light Polarity Input or Select 14 RED Battery 6 Pin Connector Pin Number Wire Color Description 1 PINK Ignition Output 2 RED Battery 12 Volts 3 PINK Ignition Output 4 VIOLET Starter Output 5 GRAY Heater AC O...

Page 7: ... control unit as possible 3 Route the antenna cable up through the driver side windshield pillar behind the headliner and behind the rear view mirror 4 Fasten the antenna to the windshield with the attached adhesive tape Attach the antenna vertically so the rubber tip on the end of the antenna is facing downward Wireloom 1 Plug the wirelooms securely into the control unit 2 Route wires from the co...

Page 8: ...e a voltmeter to find the one wire at the brake light switch usually located on the upper brake pedal arm that shows 12 volts when you press the brake pedal and 0 volts when the brake pedal is not pressed 3 Connect the YELLOW wire to the vehicle brake light switch wire Parking Lights 1 If the parking lights are positive trigger connect the RED WHITE wire to the battery positive terminal through th...

Page 9: ...k while in the remote start mode the system will shut down immediately 1 Set the parking brake 2 Turn the ignition key to the ON position and adjust the gear shift selector to Reverse 3 Use a voltmeter to find the wire that will show 12 volts in Reverse and 0 volts in Park 4 Connect the YELLOW BLACK wire to the vehicle s reverse light wire Remote Start Activated Output The GRAY BLACK wire will pro...

Page 10: ...tem does not have a designated arm wire To arm the alarm you must lock the doors while the interior lights are on 1 Use a volt ohmmeter to locate the vehicle lock switch wire If the vehicle lock wire is not trigger you will need to add a relay 2 Connect the AviStart BLUE WHITE wire to the vehicle lock wire or additional lock relay 3 Use a volt ohmmeter to find the vehicle interior light wire It wi...

Page 11: ...activate the vehicle s heater AC system an additional 30 amp relay must be added Do not use the GRAY wire to power more than one heater AC wire 1 Use a voltmeter to find the wire s that show 12 volts when the ignition key is in the ON position 0 volts while the starter is cranking and 12 volts while running 2 Cut this wire in half Start the vehicle and turn the blower switch on The blower should n...

Page 12: ...ome vehicles combine the neutral safety switch and the steering column shift mechanism together The starter wires run from the combined switch directly to the starter solenoid The remote start wire connection cannot be made between the ignition switch and the neutral safety switch As a result if the vehicle was left in gear with the key in the ignition and not in the locked position the vehicle co...

Page 13: ...ges 5 Activate the remote engine starter 6 If the vehicle starter engages immediately press the brake pedal to disengage shut down the remote start You have a combined type neutral safety switch and you will have to add an additional relay as shown in the diagram 7 If the vehicle starter does not engage no additional relays are required All vehicles have a key in the ignition reminder circuit key ...

Page 14: ...12 AviStart 2501 Installation Manual Rev B 100199 Gen eral Mo tors Sport Util ity Ve hi cles Trucks and ColumnShiftPassengerVehicles DodgeDakotaPickupTrucks ...

Page 15: ...volts AC while the vehicle is idle and increase an additional 1 to 5 volts AC when the engine RPM is raised to 3000 4000 RPM 3 Connect the WHITE GREEN wire to the vehicle tach wire Hood Switch Mandatory As a safety precaution the hood switch prevents the vehicle from starting when the hood is open If the vehicle is in the remote start mode and the hood is opened the remote start will immediately s...

Page 16: ...ected correctly 11 Install the 5 amp fuse in the 18 ga RED wire fuse assembly 12 Install the 20 amp fuse in theRED WHITE wire fuse assembly 13 Install the two 20 amp fuses in the 10 ga RED wire fuse assemblies Mandatory RPM Programming In order to remote start the vehicle engine and prevent over grinding of the starter motor the engine RPM must be programmed into the system memory The AviStart has...

Page 17: ...ode 2 Select the feature you wish to program from the Programming Table for System Features or the Programming Table for Remote Controls on page 16 Note the number of beeps associated with that feature 3 Turn the ignition key to the ON position 4 Within 10 seconds begin flicking the valet switch on and off The piezo beeper will beep once each time you flick the switch on then off 5 Continue flicki...

Page 18: ... Factory Setting No of beeps Secondary Action Remote Engine Start Green START Button 6 Press the Green START Button the piezo beeper will beep 1 times Remote Engine Stop Red STOP Button 7 Press the Red STOP Button the piezo beeper will beep 2 times One Step Remote Control Code Learning Green START Button 8 Press the Green START Button the piezo beeper will beep 1 time Instant Remote Control Code D...

Page 19: ...17 AviStart 2501 Installation Manual Rev B 100199 ...

Page 20: ...AviStart 2501 Installation Manual Rev B 100199 1999 Avital Technologies Inc A Division of Clifford Electronics PartNumber 32 2501B AviStart2501IM 1099 ...

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