Standalone TCU: Error Codes

If your Standalone TCU is flashing one or multiple of the Gear LEDs it is displaying an Error code the Error codes are listed below.

Codes:

• 11 - Your base shift down RPM is set same as or higher then your base shift up RPM.
• 12 - Manual Lockup switch circuit high
• 13 - Manual Shift Up circuit high
• 14 - Manual shift down circuit high
• 23 - Base pressure set too low