Toyota prius 3rd gen Power Swich Assembly (L43)

Toyota Prius 3 ^rd Generation (XW30)

Power Swich Assembly Wiring Guide: DIY Pinout Diagram

What is: The vehicle push-button Power Switch Assembly is an electronic ignition control that allows the driver to turn the vehicle ON or OFF without a traditional key. When pressed, it sends a signal to the vehicle’s control modules to activate accessory, ignition, or hybrid/engine systems, depending on brake input and vehicle status.

Power Swich Assembly (89611-33010)

Toyota Prius 3rd Gen Push Button Power Switch Assembly 89611-33010 for keyless ignition

High-quality Prius push button start switch 89611-33010 OEM part

Toyota Prius push button ignition switch 89611-33010 close-up view

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1. Introduction

      The  Toyota Prius 3rd Generation push-button Power Switch Assembly (89611-33010) is a keyless ignition component designed for efficient hybrid vehicle operation. It allows the driver to start or shut down the vehicle by pressing the POWER button, eliminating the need for a conventional ignition key. Working together with the smart key system, brake pedal switch, and hybrid vehicle control ECU, it ensures safe and accurate system activation. The assembly controls power modes such as OFF, ACC, and ON/READY, depending on driver input. Its back-illuminated design provides clear status indication, enhancing usability, safety, and overall driving convenience in the Prius ZVW30.

Related parts and Accessories

• Smart Key ECU:-Authenticates the key fob and permits power activation
• Hybrid Vehicle Control ECU:-Manages READY mode and hybrid system startup
• Brake Pedal Switch:-Confirms brake input for safe engine/hybrid activation
• Power Management Control ECU:-Controls vehicle power mode transitions
• Combination Meter:-Displays power and READY status to the driver
• Body ECU (Main Body ECU):-Communicates switch signals through the CAN network
• 12-Volt Auxiliary Battery:-Supplies initial electrical power for system activation

2. Video Explanation (Quick Overview)

The Prius 3rd Gen power switch assembly enables keyless starting, manages hybrid power modes, and works with the smart key system for safe, convenient vehicle operation.

2. Power Swich Assembly Wiring Diagram & Pinout

A. Connector Location

• Power Swich Assembly Position: Mounted on the dashboard near the steering wheel, integrated into the instrument panel for easy driver access.




• Connector Type:
  • L43 (14 pin) Black housing

B. Wiring Table

Power Swich Assembly (L43)

L43 TERMINALS OF Power Swich Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
L43-1	_	_	_
L43-2	SS2	(Y) Yellow	➔ L6 17 (SSW2) [Power Management Control ECU]
L43-3	_	_	_
L43-4	_	_	_
L43-5	GND (Ground)	(W) White	➔ 3A 57 ⇔ 3A 67 ➔ L93 5 ⬌ L93 3 ➔ ▼ L1 (Ground Point)
L43-6	_	_	_
L43-7	SS1	(B) Black	➔ L5 7 (SSW1) [Power Management Control ECU]
L43-8	AGND	(P) Pink	➔ L62 36 (AGND) [Certification ECU Assembly]
L43-9	TXCT	(V) Violet	➔ L62 13 (TXCT) [Certification ECU Assembly]
L43-10	CODE	(L) Blue	➔ L62 13 (CODE) [Certification ECU Assembly]
L43-11	SWIL	(G) Green	➔ L62 11 (SWIL) [Certification ECU Assembly]
L43-12	INDS	(R) Red	➔ L5 8 (INDS) [Power Management Control ECU]
L43-13	INDW	(G) Gray	➔ L5 9 (INDW) [Power Management Control ECU]
L43-14	VC5	(Y) Yellow	➔ L62 28 (VC5) [Certification ECU Assembly]

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3. Quick Pin Summary – L43 Connector

14-Pin Black Connector

• L43-1 Not used (Reserved) :
  No electrical function. Terminal is not connected or used in this model.
• L43-2 SS2 (Power Switch Signal 2) :
  Detects POWER button operation state. Used by the system to determine switch press logic. Connected to Power Management Control ECU, connector L6, terminal 17 (SSW2).
• L43-3 Not used (Reserved) :
  No circuit function. Terminal is inactive.
• L43-4 Not used (Reserved) :
  No electrical role in operation.
• L43-5 GND (Ground) :
  Provides chassis ground reference for the power switch circuit. Ensures stable signal operation and noise reduction. Connected to Body Ground Point L1
• L43-6 Not used (Reserved) :
  No connection assigned.
• L43-7 SS1 (Power Switch Signal 1) :
  Primary POWER button signal detection. Works with SS2 to identify press timing and mode selection. Connected to Power Management Control ECU, connector L5, terminal 7 (SSW1).
• L43-8 AGND (Analog Ground) :
  Reference ground for analog signal processing. Improves accuracy of communication signals. Connected to Certification ECU, connector L62, terminal 36 (AGND).
• L43-9 TXCT (Transponder Communication) :
  Handles communication between power switch and smart key system. Used for key authentication logic. Connected to Certification ECU, connector L62, terminal 13 (TXCT).
• L43-10 CODE (Immobilizer Code Signal) :
  Transfers coded authorization data. Ensures vehicle can only start with a valid smart key. Connected to Certification ECU, connector L62, terminal 13 (CODE).
• L43-11 SWIL (Switch Illumination Control) :
  Controls back-lighting of the POWER button. Brightness and ON/OFF status managed by ECU. Connected to Certification ECU, connector L62, terminal 11 (SWIL).
• L43-12 INDS (Indicator Signal – Status) :
  Outputs READY / operating status indicator signal. Used to drive visual feedback on the switch. Connected to Power Management Control ECU, connector L5, terminal 8 (INDS).
• L43-13 INDW (Indicator Warning) :
  Controls warning or mode indicator lighting. Works with system logic for driver feedback. Connected to Power Management Control ECU, connector L5, terminal 9 (INDW).
• L43-14 VC5 (5-Volt Reference Supply) :
  Supplies regulated reference voltage to the switch circuitry. Used for internal signal detection and logic. Connected to Certification ECU, connector L62, terminal 28 (VC5).

Quick Note:The Power Switch Assembly converts the driver’s button press into multiple logic signals (SS1, SS2) used by the Power Management Control ECU to control OFF, ACC, ON, and READY modes. It communicates with the Certification ECU for smart key authentication, immobilizer coding, illumination control, and 5-volt reference supply. Ground and analog ground circuits ensure stable and noise-free operation, while indicator outputs provide visual status feedback to the driver.