DTC Advanced Diagnostics: P1701 (1.5L Engine)
DTC P1701: Back-Up Light Switch Malfunction
General Description
The powertrain control module (PCM) inputs the back-up light switch output signal to detect whether the vehicle is running in reverse. When the shift position is in reverse, the back-up light switch is ON, and when the shift position is in other than reverse (including neutral), the back-up light switch is OFF. If the back-up light switch is stayed ON for a certain mileage, the PCM detects a back-up light switch stuck on, and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | - |
| DTC Type | Two drive cycles, MIL off |
Enable Conditions
| Condition | |
|---|---|
| Vehicle | ON mode |
Malfunction Threshold
The back-up light switch stayed ON while the vehicle is driven for 2 km (2 miles) or more.
Possible Cause
The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Back-up light switch BACK_LT line short to power
- Back-up light switch stuck on
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, a Confirmed DTC, the freeze data, and the on-board snapshot are stored in the PCM memory. The MIL does not come on.
Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.