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Fish Tuning 06+ Cummins Fish Tuning EFI Live CSP5 Switch

06+ 5.9L & 6.7L Cummins CSP5 EFI Live Switch

These cables are all PASS-THROUGH design and have another port to plug into to do diagnostics. NEVER try to tune a truck without plugging directly into the factory OBD2 port. 

CSP5 allows users to switch on the fly between 5 user defined tunes. 
30 individual tables are available for modification in each of the 5 tuning slots.

Some trucks (normally 13+), may only offer 4 tunes. Some Cab & Chassis only hold 2 positions.

Please Verify with Tuner Which Switch is Needed For Their Tuning.

his CSP5 switch works with EFILive®, MM3, Smarty & RME tunes.

As of this printing: For EFILive®, 06-09 trucks have five tunes. Later trucks have four tunes except 2010-2012 “cab and chassis” models which have two tunes. 2013+ is CSP4. If the switch only selects two or four tunes, then you likely have a CSP2 or CSP4 tune.

For MM3, Smarty and RME, all tunable years have five tunes.

Plug in the switch. It will start by blinking the firmware version number, a series of long and short blinks. Turn the key on and change the tune and it will blink the tune it just set.  Test all the positions, if it correctly blinks the tune number in each position, than it’s working perfectly. If it doesn’t work in position five or in positions 3-5, you most likely only have two or four tunes and should follow the directions for moving the tabbed washer. Once you’ve determined it’s working, you should finish installing it.

Unless you have a mounting bracket, installing the switch requires the drilling of two holes, one small and one large. If you don’t want to drill the second hole, you may cut off the anti-rotation pin so you don’t need the small hole.

After routing wire and before installing switch, please use included tie wrap to secure black jacket of the cable to the switch using the small slot in the corner of the PCB. This prevents wires from getting pulled out of the connector or the connector getting pulled free.

Your switch has a nut and two washers. The smooth washer must remain on the bottom with the tab located in hole number five*. If it falls out, turn the switch fully counter clockwise and place the washer back with the pin in hole number five. Make sure the switch moves exactly four clicks clockwise. If not, turn the switch back fully counterclockwise, move the pin, and try again.

*If you have a CSP2 or CSP4 tune, follow the instructions in the previous paragraph but place the tab in hole number two or four, instead of hole number five.

For 2018+ and if you use EFILive®, you will also need a Cummins Bypass Cable to flash (and to use the CSP5 switch). And, you MAY also need it for MM3, Smarty & RME if the security module fails.

CSP5 Tunes must be written using the following software release or later. 

  • V7.5.7 build 244 
  • V8.2.2 build 236 
  • Boot block 2.07.06 
  • Firmware 2.07.51 
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