DTC Detection Logic
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD and 2019 Nissan NV2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The ECM receives two vehicle speed signals by the CAN communication line. One is sent from "combination meter", and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD control. Refer to System Description for ASCD functions.
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DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
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P1574 |
ASCD VHL SPD SEN (ASCD vehicle speed sensor) |
Diagnosis condition |
-- |
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Signal (terminal) |
ASCD steering switch signal |
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Threshold |
ECM detects a difference between two vehicle speed signals is out of the specified range |
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Diagnosis delay time |
-- |
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