DTC P17A4: Automatic Disconnecting Differential Motor Limit Switch Circuit [08/2019 - ]: Description
WARNING: This page is about a different car, the 2024 Toyota 4Runner, 2023 Toyota 4Runner, 2022 Toyota 4Runner, 2021 Toyota 4Runner, and 2020 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
When the A.D.D. actuator switches between 2WD and 4WD, the DL1 and DL2 terminals of the limit switch and ADD terminal of the A.D.D. position switch change to one of the following ON/OFF combinations listed in the table below.
| Terminal | In 2WD | Switching between 2WD and 4WD | In 4WD | |
|---|---|---|---|---|
| DL1 | ON (GND) | ON (GND) | OFF (OPEN) | |
| DL2 | OFF (OPEN) | ON (GND) | ON (GND) | |
| ADD | OFF (OPEN) | OFF (OPEN) | ON (GND) | ON (GND) |
A malfunction is detected depending on the combination of the 3 circuits that make up the limit switch and A.D.D. position switch.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P17A4 | Automatic Disconnecting Differential Motor Limit Switch Circuit |
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