Diagnostic trouble code (DTC) information
Condition
The load signal from the engine control module (ECM) is a pulsed signal (between approximately 0 V and battery voltage) with a variable frequency and pulse ratio (% duty). The frequency increases with engine speed. The pulse ratio increases with load. Diagnostic trouble code (DTC) DSA-221 is stored if the DSA control module registers that there are no pulses from the engine control module (ECM) for approximately 1.5 seconds.
Substitute Value
The DSA function is disengaged.
Possible Source
- Open-circuit in the signal cable.
- Short-circuit to supply voltage or ground in the signal cable.
- Intermittent open-circuit in the supply voltage or the ground lead for the DSA control module.
- Contact resistance in the terminals.
Fault symptom[s]
- The DSA warning lamp lights.
- The anti-spin function is not operative while the DSA function is disengaged.