Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 972
FMI: 2
Description: Throttle Inhibit Switch Signal Not Plausible Due To Excess Vehicle Speed
Troubleshooting:
DESCRIPTION:
Throttle inhibit switch signal not plausible.
MONITORED PARAMETER:
Throttle inhibit
TYPICAL ENABLING CONDITIONS:
Always enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Always enabled
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
CEL
ENGINE REACTION:
None
VERIFICATION:
Key on
POSSIBLE CAUSES:
1. Faulty Controller Area Network (CAN) line.
2. CPC needs reprogramming.
3. CPC needs proper configuring.
4. Bent pins.
5. Spread pins.
6. Corroded pins.
7. Faulty wiring.
8. Faulty throttle inhibit switch.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 973
FMI: 2
Description: Evobus 5-stage Retarder Level Position Not Plausible
Troubleshooting:
NOTE: Evobus 5-stage Retarder Level Position Not Plausible – Short to Power/Open Circuit on
Pin 13 of the Common Powertrain Controller #2 Connector
NOTE: The Common Powertrain Controller (CPC) digital outputs have the same SPN as some
Motor Control Module (MCM) faults. The diagnostic tool standard makes the distinction
between the MCM and CPC when diagnosing a fault.
POSSIBLE CAUSES:
Faulty wiring.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 973
FMI: 9
Description: J1939 Electronic Brake Controller (EBC1) (Engine Brake Switches) is Missing
Troubleshooting:
POSSIBLE CAUSES:
1. Faulty Controller Area Network (CAN) line.
2. CPC needs reprogramming.
3. CPC needs proper configuration.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)CPC
PID: N/A
SPN: 973
FMI: 9
Description: Engine Retarder Selection Signal is Erratic
Troubleshooting:
POSSIBLE CAUSES:
1. Faulty Controller Area Network (CAN) line.
2. CPC needs reprogramming.
3. CPC needs proper configuration.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 973
FMI: 13
Description: Engine Retarder Selection Signal is Missing
Troubleshooting:
POSSIBLE CAUSES:
1. Faulty Controller Area Network (CAN) line.
2. CPC needs reprogramming.
3. CPC needs proper configuration.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 974
FMI: 2
Description: Remote Accelerator Pedal Supply Voltage Out of Range
Troubleshooting:
DESCRIPTION:
This fault may occur if remote accelerator pedal is programmed ON and remote pedal circuit is
shorted to power or ground.
MONITORED PARAMETER:
Remote throttle sensor.
TYPICAL ENABLING CONDITIONS:
Always enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Always enabled
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
CEL
ENGINE REACTION:
None
VERIFICATION:
Key on, Engine on.
POSSIBLE CAUSES:
1. CPC needs proper configuring.
2. Faulty wiring.
Make: Detroit
Engine: DD15 GHG17 (2017 & Newer)
PID: N/A
SPN: 974
FMI: 3
Description: Remote Accelerator Pedal Circuit Failed High
Troubleshooting:
DESCRIPTION:
This fault may occur if remote accelerator pedal is programmed ON and remote pedal circuit is
shorted to power while pin 8 of the Common Powertrain Controller (CPC) connector #2 is
grounded.
MONITORED PARAMETER:
Remote throttle sensor.
TYPICAL ENABLING CONDITIONS:
Always enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCEY:
Always enabled
TYPCIAL DURATION:
Two seconds
DASH LAMPS:
CEL
ENGINE REACTION:
None
VERIFICATION:
Key on, Engine on with remote pedal activated.
POSSIBLE CAUSES:
1. CPC needs proper configuring.
2. Faulty wiring.
3. Faulty remote throttle switch.