Toyota prius 3rd gen Combination Meter Assembly (L27)

Toyota Prius 3 ^rd Generation (XW30)

Combination Meter Assembly Wiring Guide: DIY Pinout Diagram

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What is: The Combination Meter Assembly is the vehicle’s instrument cluster that displays key driving information such as speed, fuel level, warning lights, and system indicators. It communicates with various ECUs to provide real-time data to the driver. In the Toyota Prius 3rd Gen, it includes a digital speedometer, hybrid indicators, and essential warning displays.

Combination Meter Assembly – Toyota Prius 3 ^rd Generation (XW30)

Toyota Prius 3rd Gen Combination Meter Assembly 83800-47370 dashboard display unit

OEM Toyota Prius 83800-47370 combination meter front view

Toyota Prius 2010–2015 digital instrument cluster meter assembly

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1. Introduction

      The  Toyota Prius 3rd Generation Combination Meter Assembly (83800-47370) is an advanced digital instrument cluster designed to display essential vehicle information clearly and efficiently. Located on the dashboard, it integrates the speedometer, fuel gauge, odometer, and hybrid system indicators into one central unit. This assembly communicates with multiple vehicle ECUs through the CAN network, ensuring accurate real-time data such as speed, fuel consumption, and system alerts. The unit also features various warning and indicator lights to enhance driver awareness and safety. Its efficient digital design complements the Prius’s hybrid technology, providing a smooth, modern, and energy-efficient driving experience.

1. Related parts and Accessories
   • Meter ECU (Electronic Control Unit) :- A built-in microcomputer inside the combination meter assembly. It receives data from various sensors and ECUs, processes it, and controls what is shown on the display—such as speed, fuel level, warning lights, and hybrid energy information.
   • Body ECU / Gateway ECU :- Acts as a communication bridge between the combination meter and other systems like the hybrid control ECU, power management ECU, and ABS ECU. It ensures that all status updates (e.g., door open, low fuel, battery charge) are accurately displayed on the instrument cluster.
   • Wiring Harness or Connectors :- The electrical cables and plugs that supply power and transmit data signals between the combination meter, ECUs, and sensors. Damaged connectors or poor contact may cause display malfunctions or warning light errors.
   • Speed Sensor (Vehicle Speed Sensor) :- Sends wheel-rotation data to the ECUs and meter to calculate and display vehicle speed. If faulty, the speed display or cruise control may stop working.
   • Fuel Level Sensor:- Located in the fuel tank; sends real-time fuel level data to the meter ECU to show the fuel gauge reading.
   • Shift Position Sensor :- Detects which gear (P, R, N, D, or B) is selected and sends that information to the display.
   • Hybrid System Sensors / Battery ECU :- Collects hybrid system data such as battery charge, energy flow, and regenerative braking status and transmits it to the combination meter for the Hybrid System Indicator.
   • Dashboard Trim, Lens, and Mounting Brackets :- Physical components that support and protect the combination meter assembly. The lens shields the display from dust and glare, while brackets and trim panels keep it properly aligned inside the dashboard.
   • Illumination LEDs or Backlight Units :- Provide internal lighting for the digital display, ensuring visibility in both day and night conditions. Worn or failed LEDs may cause dim or dark display sections.

2. Combination Meter Assembly Wiring Diagram & Pinout

A. Connector Location

• Combination Meter Assembly Position: inside the dashboard, directly above the steering wheel area.
• Connector Type:
  • L27 (40 pin) White housing

B. Wiring Table

Combination Meter Assembly (L27)

L27 TERMINALS OF Combination Meter Assembly CONECTOR

Terminal No	Symbol (Pin Definition)	Wiring (Color Code) & Color	Electrical Paths
L27-1	_	_	_
L27-2	TC O	(G) Green	➔ L57 1 (CS) [Tip Switch Assembly]
L27-3	TIRE (Tire Pressure Warning Inductor)	(G) Green	➔ L4 5 (IND) [ Tire Pressure Warning ECU ]
L27-4	_	_	_
L27-5	S ( Engine Oil Pressure Inductor)	(R) Red	➳ AL1 20 ➳ DA1 16 ➔ D26 1 [ Engine Oil Pressure Switch Assembly ]
L27-6	LVWG (Head Light Leveling Indicator)	(L) Blue	➳ AL7 3 ➔ A48 6 (WNG) [ Head Light Leveling ECU Assembly ]
L27-7	+S	(V) Velvet	➔ L89 16 ⬌ L89 18 ➔ L50 3 (SPD) [Radio Receiver Assembly] ➔ L89 16 ⬌ L89 17 ➔ 3A 26 ⇔ 3A 2 ➔ L5 14 (SPDI) [Power Management Control ECU] ➔ L89 16 ⬌ L89 17 ➔ 3A 26 ⇔ 3B 1 ➔ L4 2 (SPD) [Tire Pressure Warning ECU] ➔ L89 16 ⬌ L89 17 ➔ 3A 26 ⇔ 3B 85 ➔ 4A 21 ⇔ 4A 68 ➔ L41 3 (SPD) [Radio Receiver Assembly] ➔ L89 16 ⬌ L89 17 ➔ 3A 26 ⇔ 3B 85 ➔ 4A 21 ⇔ 4A 69 ➔ L31 11 (SPD) [Stereo Component Amplifier Assembly] ➔ L89 16 ⬌ L89 17 ➔ 3A 26 ⇔ 3B 85 ➔ 4A 21 ⇔ 4A 56 ➳ AL7 2 ➔ A48 16 (SPDR) [Head Light Leveling ECU Assembly] ➔ L89 16 ⬌ L89 17 ➔ 3A 26 ⇔ 3B 85 ➔ 4A 21 ⇔ 4A 80 ➔ L19 10 (SPDP) [Telematics Transceiver]
L27-8	SI	(V) Velvet	➳ AL2 18 ➔ A58 11 (SP1) [Skid Control ECU with Actuator Assembly]
L27-9	EL (Engine Coolant temperature Indicator)	(G) Green	➳ AL2 9 ➳ DA1 5 ➳ GD1 2 ➔ G2 1 (E2) [Coolant Temperature Sensor Assembly]
L27-10	CANH	(P) Pink	➔ L94 1
L27-11	CANL	(W) White	➔ L94 12
L27-12	HOUR	(B) Black	➔ L57 9 (HOUR) [Tip Switch Assembly]
L27-13	MIN	(B) Black	➔ L57 10 (MIN) [Tip Switch Assembly]
L27-14	L (Fuel Sender Gage Indicator)	(B) Black	➳ LR1 44 ➔ R11 2 (FS) [Fuel Sender Gage Assembly]
L27-15	ES2 (Fuel Sender Gage Indicator)	(W) White	➔ LR1 20 ➳ R11 3 (FE) [Fuel Sender Gage Assembly]
L27-16	TWS3 (Engine Coolant temperature Indicator)	(B) Black	➳ AL2 8 ➳ DA1 6 ➳ GD1 1 ➔ G2 2 (TWS3) [Coolant Temperature Sensor Assembly]
L27-17	RST	(R) Red	➔ L57 11 (RST) [Tip Switch Assembly]
L27-18	B (Battery Positive)	(R) Red	➔ 2A 37 ⇔ 2C 18 ➔ 1 2 ➤ (BAT) 7.5A Blade Fuse [ECU-B]
L27-19	IG+ (Ignition Positive)	(L) Blue	➔ 2A 31 ➤ (IG) 10A Blade Fuse [GAUGE]
L27-20	IG2 (Ignition Positive)	(G) Green	➔ 2A 44 ➤ (IG) 7.5A Blade Fuse [MET]
L27-21	PBLT (Passenger Seat Belt Warning Indicator)	(Y) Yellow	➔ 3A 34 ⇔ 3A 83 ➔ LI2 4 ➳ IM1 2 ➳ M2 3 (PBEW) [PassengerS Seat Belt Warning Ligjt Assembly]
L27-22	LP (Security Inductor)	(B) Black	➔ 3A 35 ⇔ 3A 59 ➔ L62 2 (IND) [Certification ECU Assembly]
L27-23	_	_	_
L27-24	_	_	_
L27-25	EFI (Malfunction Indicator Lamp)	(LG) Light Green	➳ AL2 11 ➔ A57 36 (W) [Engine Control Module]
L27-26	B (Turn LH Indicator)	(Y) Yellow	➔ 2A 42 ⇔ 2A 22 ➔ L55 3 (LL) [Turn Signal Flasher Assembly] ➔ 2A 42 ⇔ 2D 17 ➔ LR1 55 ➳ R17 3 (B) [Rear Combination Light Assembly LH] ➔ 2A 42 ⇔ 2C 17 ➳ CA1 5 ➔ C3 1 [Front Turn Signal Light LH]
L27-27	B (Turn RH Indicator)	(G) Green	➔ 2A 36 ⇔ 2A 17 ➔ L55 2 (LR) [Turn Signal Flasher Assembly] ➔ 2A 36 ⇔ 2D 4 ➔ LS1 2 ➳ S18 3 (B) [Rear Combination Light Assembly RH] ➔ 2A 36 ⇔ 2C 36 ➳ CA1 5 ➔ C5 1 [Front Turn Signal Light RH]
L27-28	_	_	_
L27-29	STRG	(G) Green	➔ 3A 36 ⇔ 3B 71 ➔ L52 3 (TX1) [Spiral Cable Sub-Assembly]
L27-30	ES ( GND)	(BR) Brown	➔ ▼ L2 (Ground Point)
L27-31	_	_	_
L27-32	_	_	_
L27-33	_	_	_
L27-34	_	_	_
L27-35	TC	(G) Green	➔ L59 5 (TC) [Light Control Rheostat]
L27-36	SW1	(B) Black	➔ L59 7 (T) [Light Control Rheostat]
L27-37	SW2	(B) Black	➔ L59 3 (TR) [Light Control Rheostat]
L27-38	SW3	(R) Red	➔ L59 1 (E) [Light Control Rheostat]
L27-39	RL	(L) Blue	➔ 3A 29
L27-40	RV	(W) White	➔ 3A 25

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