Diagnostic Trouble Codes (DTC's) and LED Indicators
Controller LED Indicators
The LED indicators on the COMPUSHIFT Sport and COMPUSHIFT Pro illuminate in various patterns and combinations as follows:
LED Pattern | MEANING |
---|---|
Blank | Power is off. |
Solid Red | 12 volt bus voltage is low. |
Solid Green | Voltage OK, internal startup problem. |
Slow Blinking Green | Normal operation. |
Fast Blinking Green | System bootloader is running, ready to update firmware. |
Slow Blinking Red | A DTC / fault has occurred, but is not presently active. |
Fast Blinking Red | A DTC / fault is occurring now. |
Regulation Fault Codes
Regulation | Meaning | Notes | Possible |
---|---|---|---|
None | No fault | ||
Resistance Low | The effective resistance of the solenoid in the circuit is significantly lower than expected. The system knows the expected solenoid resistance and using Ohm's law calculates the effective solenoid resistance using the measured solenoid current and bus voltage. | Usually this fault only occurs with on/off solenoids. | Failing solenoid, bad transmission ground, harness damage. |
Resistance High | The effective resistance of the solenoid in the circuit is significantly higher than expected. The system knows the expected solenoid resistance and using Ohm's law calculates the effective solenoid resistance using the measured solenoid current and bus voltage. | Usually this fault only occurs with on/off solenoids. | Failing solenoid, bad transmission ground, harness damage. |
Current High | There is a short circuit or other solenoid load that is much lower resistance than expected. | May occur with any type of solenoid. This is like a circuit breaker tripping. | Short circuit. |
Regulation Alternating | The commanded current in the solenoid is varying more than expected. | Only occurs with a PWM solenoid. | Alternator rectifier failure, excessive ripple on the 12V bus. Poor wiring, bad ground. |
Regulation Low | The actual current in the solenoid is consistently less than commanded current in the solenoid | Only occurs with a PWM solenoid. | Poor wiring to transmission controller, bad ground, excessive ripple on the 12V bus, small gauge wire used where it should not be on power or ground circuits. |
Regulation High | The actual current in the solenoid is consistently more than commanded current in the solenoid | Only occurs with a PWM solenoid. | Poor wiring to transmission controller, bad ground, excessive ripple on the 12V bus, small gauge wire used where it should not be on power or ground circuits. |
Invalid Mode | The solenoid driver system was commanded to an invalid mode | This error should never occur on production software. |
Diagnostic Trouble Codes
The following is a complete list of all possible trouble codes on the COMPUSHIFT Pro and COMPUSHIFT Sport.
Not all of these are used in all configurations.
Code | Meaning | Possible Causes |
---|---|---|
P0069 | Manifold Absolute Pressure - Barometric Pressure Correlation | |
P0105 | Manifold Absolute Pressure/Barometric Pressure Sensor Circuit | |
P0107 | Manifold Absolute Pressure/Barometric Pressure Sensor Circuit Low | |
P0108 | Manifold Absolute Pressure/Barometric Pressure Sensor Circuit High | |
P0115 | Engine Coolant Temperature Sensor 1 Circuit | |
P0117 | Engine Coolant Temperature Sensor 1 Circuit Low | |
P0118 | Engine Coolant Temperature Sensor 1 Circuit High | |
P0120 | Throttle/Pedal Position Sensor/Switch A Circuit | |
P0122 | Throttle/Pedal Position Sensor/Switch A Circuit Low | |
P0123 | Throttle/Pedal Position Sensor/Switch A Circuit High | |
P0218 | Transmission Fluid Temperature Sensor A Over Temperature Condition | Transmission specific, but it means too hot! |
P0500 | Vehicle Speed Sensor A Circuit | |
P0638 | Throttle Actuator Control Range/Performance Bank 1 | |
P063E | Auto Configuration Throttle Input Not Present Bank 1 | |
P0701 | Transmission Control System Range/Performance | |
P0702 | Transmission Control System Electrical |
|
P0705 | Transmission Range Sensor A Circuit (PRNDL Input) | |
P0706 | Transmission Range Sensor A Circuit Range/Performance | |
P0707 | Transmission Range Sensor A Circuit Low | |
P0708 | Transmission Range Sensor A Circuit High | |
P070A | Transmission Fluid Level Sensor Circuit | |
P070C | Transmission Fluid Level Sensor Circuit Low | |
P070D | Transmission Fluid Level Sensor Circuit High | |
P070F | Transmission Fluid Level Too Low | |
P0710 | Transmission Fluid Temperature Sensor A Circuit | |
P0712 | Transmission Fluid Temperature Sensor A Circuit Low | |
P0713 | Transmission Fluid Temperature Sensor A Circuit High | |
P0715 | Input/Turbine Shaft Speed Sensor A Circuit | |
P0729 | Gear 6 Incorrect Ratio | |
P0730 | Incorrect Gear Ratio | |
P0731 | Gear 1 Incorrect Ratio | |
P0732 | Gear 2 Incorrect Ratio | |
P0733 | Gear 3 Incorrect Ratio | |
P0734 | Gear 4 Incorrect Ratio | |
P0735 | Gear 5 Incorrect Ratio | |
P0736 | Reverse Incorrect Ratio | |
P073D | Unable to Engage Neutral | |
P073E | Unable to Engage Reverse | |
P073F | Unable to Engage Gear 1 | |
P0740 | Torque Converter Clutch Circuit/Open | |
P0745 | Pressure Control Solenoid A | |
P0750 | Shift Solenoid A | |
P0755 | Shift Solenoid B | |
P075A | Shift Solenoid G | |
P0760 | Shift Solenoid C | |
P0765 | Shift Solenoid D | |
P076A | Shift Solenoid H | |
P076F | Gear 7 Incorrect Ratio | |
P0770 | Shift Solenoid E | |
P0775 | Pressure Control Solenoid B | |
P077F | Reverse 2 Incorrect Ratio | |
P0781 | 1-2 Shift | |
P0782 | 2-3 Shift | |
P0783 | 3-4 Shift | |
P0784 | 4-5 Shift | |
P0785 | Shift Timing Solenoid A | |
P078A | Shift Timing Solenoid B | |
P0795 | Pressure Control Solenoid C | |
P07D9 | Gear 8 Incorrect Ratio | |
P07DA | 6-7 Shift | |
P07DB | 7-8 Shift | |
P07DD | Incorrect Shift From Gear 2 | |
P07DE | Incorrect Shift From Gear 3 | |
P07DF | Incorrect Shift From Gear 4 | |
P07E0 | Incorrect Shift From Gear 5 | |
P07E1 | Incorrect Shift From Gear 6 | |
P07E2 | Incorrect Shift From Gear 7 | |
P07E3 | Incorrect Shift From Gear 8 | |
P07F6 | Gear 9 Incorrect Ratio | |
P07F7 | Gear 10 Incorrect Ratio | |
P0829 | 5-6 Shift | |
P083B | Transmission Fluid Pressure Sensor/Switch G Circuit Range/Performance | |
P0840 | Transmission Fluid Pressure Sensor/Switch A Circuit | |
P0841 | Transmission Fluid Pressure Sensor/Switch A Circuit Range/Performance | |
P0842 | Transmission Fluid Pressure Sensor/Switch A Circuit Low | |
P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High | |
P0846 | Transmission Fluid Pressure Sensor/Switch B Circuit Range/Performance | |
P084B | Transmission Fluid Pressure Sensor/Switch H Circuit Range/Performance | |
P0869 | Transmission Fluid Pressure High | |
P0871 | Transmission Fluid Pressure Sensor/Switch C Circuit Range/Performance | |
P0876 | Transmission Fluid Pressure Sensor/Switch D Circuit Range/Performance | |
P0928 | Gear Shift Lock Solenoid/Actuator Control Circuit A/Open | |
P092A | Gear Shift Lock Solenoid/Actuator Control Circuit B/Open | |
P093A | Hydraulic Accumulator Solenoid Circuit/Open | |
P0988 | Transmission Fluid Pressure Sensor/Switch E Circuit Range/Performance | |
P0993 | Transmission Fluid Pressure Sensor/Switch F Circuit Range/Performance | |
P2135 | Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation | |
P2706 | Shift Solenoid F | |
P2713 | Pressure Control Solenoid D | |
P2722 | Pressure Control Solenoid E | |
P2731 | Pressure Control Solenoid F | |
P2756 | Torque Converter Clutch Pressure Control Solenoid | |
P2765 | Input/Turbine Shaft Speed Sensor B Circuit | |
P2807 | Pressure Control Solenoid G | |
P2816 | Pressure Control Solenoid H | |
P281F | Pressure Control Solenoid J | |
P2828 | Pressure Control Solenoid K | |
U0100 | Lost Communication With ECM/PCM A | |
U0102 | Lost Communication With Transfer Case Control Module | |
U0103 | Lost Communication With Gear Shift Control Module A | |
U0104 | Lost Communication With Cruise Control Module | |
U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | |
U0129 | Lost Communication With Brake System Control Module | |
U013C | Lost Communication With Accelerator Pedal Module | |
U013C | Lost Communication With Accelerator Pedal Module | |
U019E | Lost Communication With Transmission Range Control Module | |
U0258 | Lost Communication With Radio Transceiver | |
U0293 | Lost Communication With Hybrid/EV Powertrain Control Module | |
U0401 | Invalid Data Received From ECM/PCM A | |
U0403 | Invalid Data Received From Transfer Case Control Module | |
U0404 | Invalid Data Received From Gear Shift Control Module A | |
U0405 | Invalid Data Received From Cruise Control Module | |
U0415 | Invalid Data Received From Anti-Lock Brake System (ABS) Control Module | |
U0418 | Invalid Data Received From Brake System Control Module | |
U043D | Invalid Data Received From Accelerator Pedal Module | |
U049F | Invalid Data Received From Transmission Range Control Module | |
U0594 | Invalid Data Received From Hybrid/EV Powertrain Control Module |