Toyota Prius: Front Seat Cushion Heater (for Power Seat)

• Removal
• Inspection
• Installation

Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during front seat cushion heater assembly removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure	Necessary Procedure	Effect/Inoperative Function when Necessary Procedure not Performed	Link
*: Even when not replacing the part, it is necessary to perform the specified necessary procedures after installation.
Front seatback frame sub-assembly LH* Front seat adjuster assembly LH*	Initialize position control ECU	Front Power Seat Control System (w/ Memory)

CAUTION:

Wear protective gloves. Sharp areas on the parts may injure your hands.

CAUTION / NOTICE / HINT

HINT:

When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

CAUTION / NOTICE / HINT

COMPONENTS (REMOVAL)

Procedure		Part Name Code
1	PRECAUTION	-		-	-
2	FRONT SEAT ASSEMBLY	-	-	-	-
3	DISCONNECT SEPARATE TYPE FRONT SEATBACK COVER	71074S	-	-	-

Procedure		Part Name Code
4	FRONT SEAT FRONT CUSHION SHIELD	71868N		-	-
5	FRONT SEAT CUSHION SHIELD	71812D		-	-
6	FRONT SEAT INNER CUSHION SHIELD	71862		-	-

Procedure		Part Name Code
7	SEPARATE TYPE FRONT SEATBACK ASSEMBLY	-	-	-	-

*1

SEPARATE TYPE FRONT SEAT CUSHION ASSEMBLY

-

-

Procedure		Part Name Code
8	SEPARATE TYPE FRONT SEAT CUSHION COVER WITH PAD	-	-	-	-

*1

SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY

-

-

Procedure		Part Name Code
9	SEPARATE TYPE FRONT SEAT CUSHION COVER	71072S		-	-
10	FRONT SEAT CUSHION HEATER ASSEMBLY	87510L		-	-

*1	SEPARATE TYPE FRONT SEAT CUSHION PAD	-	-
●	Non-reusable part	-	-

PROCEDURE

1. PRECAUTION

NOTICE: After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal. Click here

2. REMOVE FRONT SEAT ASSEMBLY

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3. DISCONNECT SEPARATE TYPE FRONT SEATBACK COVER

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4. REMOVE FRONT SEAT FRONT CUSHION SHIELD

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5. REMOVE FRONT SEAT CUSHION SHIELD

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6. REMOVE FRONT SEAT INNER CUSHION SHIELD

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7. REMOVE SEPARATE TYPE FRONT SEATBACK ASSEMBLY

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8. REMOVE SEPARATE TYPE FRONT SEAT CUSHION COVER WITH PAD

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9. REMOVE SEPARATE TYPE FRONT SEAT CUSHION COVER

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10. REMOVE FRONT SEAT CUSHION HEATER ASSEMBLY

NOTICE: Replace the front seat cushion heater assembly and separate type front seat cushion pad as a set.

Inspection

INSPECTION

PROCEDURE

1. INSPECT FRONT SEAT CUSHION HEATER ASSEMBLY LH

(a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Click Location & Routing(b8) Click Connector(b8) Tester Connection Condition Specified Condition Result A-1 - A-3 Seat heater temperature 20°C (68°F) 4.005 to 4.895 Ω Ω b8-2(GND) - A-3 Seat heater temperature 20°C (68°F) Below 1 Ω Ω b8-4(THR ) - b8-5(THR-) Seat heater temperature 25°C (77°F) 7.9 to 8.1 kΩ kΩ b8-2(GND) - b8-6(E) Seat heater temperature 20°C (68°F) Below 1 Ω Ω b8-1(HTR) - b8-2(GND) Seat heater temperature 20°C (68°F) 4.005 to 4.895 Ω Ω If the result is not as specified, replace the front seat cushion heater assembly LH.

*a Component without harness connected (Front Seat Cushion Heater Assembly LH)

Installation

INSTALLATION

CAUTION / NOTICE / HINT

CAUTION:

Wear protective gloves. Sharp areas on the parts may injure your hands.

CAUTION / NOTICE / HINT

COMPONENTS (INSTALLATION)

Procedure		Part Name Code
1	FRONT SEAT CUSHION HEATER ASSEMBLY	87510L		-	-
2	SEPARATE TYPE FRONT SEAT CUSHION COVER	71072S		-	-

*1	SEPARATE TYPE FRONT SEAT CUSHION PAD	-	-
●	Non-reusable part	-	-

Procedure		Part Name Code
3	SEPARATE TYPE FRONT SEAT CUSHION COVER WITH PAD	-	-	-	-

*1

SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY

-

-

Procedure		Part Name Code
4	SEPARATE TYPE FRONT SEATBACK ASSEMBLY	-	-	-	-

*1	SEPARATE TYPE FRONT SEAT CUSHION ASSEMBLY	-	-
	Tightening torque for "Major areas involving basic Toyota Prius vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft.*lbf)	-	-

Procedure		Part Name Code
5	FRONT SEAT INNER CUSHION SHIELD	71862	-	-	-
6	FRONT SEAT CUSHION SHIELD	71812D	-	-	-
7	FRONT SEAT FRONT CUSHION SHIELD	71868N	-	-	-

Procedure		Part Name Code
8	CONNECT SEPARATE TYPE FRONT SEATBACK COVER	71074S	-	-	-
9	FRONT SEAT ASSEMBLY	-	-	-	-

PROCEDURE

1. INSTALL FRONT SEAT CUSHION HEATER ASSEMBLY

NOTICE: Replace the front seat cushion heater assembly and separate type front seat cushion pad as a set.

*a	Cutout	-	-
	Double-sided Tape	-	-

(1) Remove the release paper from a new front seat cushion heater assembly.

(2) Install the new front seat cushion heater assembly while aligning with the cutouts as shown in the illustration.

NOTICE:

Press the front seat cushion heater assembly firmly to install it.

2. INSTALL SEPARATE TYPE FRONT SEAT CUSHION COVER

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3. INSTALL SEPARATE TYPE FRONT SEAT CUSHION COVER WITH PAD

4. INSTALL SEPARATE TYPE FRONT SEATBACK ASSEMBLY

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5. INSTALL FRONT SEAT INNER CUSHION SHIELD

6. INSTALL FRONT SEAT CUSHION SHIELD

7. INSTALL FRONT SEAT FRONT CUSHION SHIELD

8. CONNECT SEPARATE TYPE FRONT SEATBACK COVER

9. INSTALL FRONT SEAT ASSEMBLY

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