DTC P18A6-00: Gear Shift Control Module "A"/"B" (Sub CPU) Ignition Switch On/Start Position Signal Compare Failure; DTC P18A6-62: Gear Shift Control Module "A"/"B" Ignition Switch On/Start Position Signal Compare Failure [10/2022 - 08/2023]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
The shift actuator ECU activates when receiving an IGR signal.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| P18A6-00 | Gear Shift Control Module "A"/"B" (Sub CPU) Ignition Switch On/Start Position Signal Compare Failure | When the ignition switch is ON and the BUB1 voltage is a certain value or more, a malfunction of the IGR1 terminal voltage is detected (1 trip detection logic) |
|
Does not come on | Multi-information Display Error Message
|
Transmission | A | SAE: P18A6 |
| P18A6-62 | Gear Shift Control Module "A"/"B" Ignition Switch On/Start Position Signal Compare Failure | When the ignition switch is ON and the BAT1 voltage is a certain value or more, a malfunction of the IGR1 terminal voltage is detected (1 trip detection logic) |
|
Does not come on | Multi-information Display Error Message
|
Transmission | A | SAE: P18A6 |