Toyota Prius: Steering Column Assembly

• Removal
• Disassembly
• Inspection
• Reassembly
• 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 steering column assembly removal/installation are shown below.

CAUTION / NOTICE / HINT

Necessary Procedure After Parts Removed/Installed/Replaced

Replacement Part or Procedure	Necessary Procedures	Effect/Inoperative Function When Necessary Procedures are not Performed	Link
*1: If matchmarks were not placed when removing parts related to steering operation, perform end position initial setting.
Power steering ECU assembly	Update ECU security key	Toyota Prius Vehicle Control History (RoB) are stored
	ECU configuration	Vehicle Control History (RoB) are stored EPS warning light illuminates
	Perform power steering ECU initial setting (torque sensor zero point calibration and assist map writing)	Toyota Prius Vehicle Control History (RoB) are stored EPS warning light illuminates
	End position initial setting	-
Electric power steering column sub-assembly	Perform power steering ECU initial setting (torque sensor zero point calibration and assist map writing)	Toyota Prius Vehicle Control History (RoB) are stored EPS warning light illuminates
	End position initial setting	-
No. 2 steering intermediate shaft assembly*1	End position initial setting	-

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.

Learning completes when Toyota Prius vehicle is driven

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
Front Camera System	Drive the Toyota Prius vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.

Learning completes when vehicle is operated normally

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedure	Link
*1: w/o Power Back Door System *2: w/ Power Back Door System
Power Door Lock Control System*1 Back door opener	Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.
Power Back Door System*2	Reset back door close position
Air Conditioning System	for HEV Model: After the ignition switch is turned to ON, the servo motor standard position is recognized. for PHEV Model: After the ignition switch is turned to ON, the servo motor and cooler expansion valve standard position is recognized.	-

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

COMPONENTS (REMOVAL)

Procedure		Part Name Code
1	PRECAUTION	-		-	-
2	ALIGN FRONT WHEELS FACING STRAIGHT AHEAD	-		-	-
3	STEERING WHEEL ASSEMBLY	45100	-	-	-

Procedure		Part Name Code
4	LOWER STEERING COLUMN COVER	45287		-	-
5	UPPER STEERING COLUMN COVER	45286B		-	-
6	TURN SIGNAL SWITCH ASSEMBLY WITH SPIRAL CABLE SUB-ASSEMBLY	-		-	-

*A

w/o Driver Monitor Camera

*B

w/ Driver Monitor Camera

Procedure		Part Name Code
7	FRONT DOOR SCUFF PLATE LH	67914	-	-	-
8	COWL SIDE TRIM BOARD LH	62112	-	-	-
9	NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY	55606	-	-	-
10	LOWER CENTER INSTRUMENT PANEL FINISH PANEL	55434B	-	-	-
11	LOWER INSTRUMENT PANEL FINISH PANEL ASSEMBLY	55480D	-	-	-
12	LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY	73900		-	-
13	NO. 2 KNEE PROTECTOR BRACKET	55462C	-	-	-
14	FRONT NO. 1 CONSOLE BOX INSERT	58816D	-	-	-

*A

w/ Knee Airbag

*B

w/o Knee Airbag

Procedure		Part Name Code
15	NO. 1 AIR DUCT	87211		-	-

●

Non-reusable part

-

-

Procedure		Part Name Code
16	COLUMN HOLE COVER SILENCER SHEET	45259A	-	-	-
17	SEPARATE NO. 2 STEERING INTERMEDIATE SHAFT ASSEMBLY	45260	-	-	-
18	REMOVE NO. 2 STEERING INTERMEDIATE SHAFT ASSEMBLY	45260	-	-	-
19	STEERING COLUMN ASSEMBLY	-		-	-

PROCEDURE

1. PRECAUTION

Click here

2. ALIGN FRONT WHEELS FACING STRAIGHT AHEAD

3. REMOVE STEERING WHEEL ASSEMBLY

Click here

4. REMOVE LOWER STEERING COLUMN COVER

NOTICE: Removing the lower steering column cover in the incorrect order will cause the parts to break.

	Push Area		Operate in this direction
	Push in this direction	-	-

(1) Release the tilt and telescopic lever and fully extend and lower the steering column assembly.

(2) Lock the tilt and telescopic lever.

(3) Remove the 3 screws.

(4) While pressing the push area shown in the illustration to disengage the 2 claws, slightly lower the lower steering column cover.

5. REMOVE UPPER STEERING COLUMN COVER

w/ Driver Monitor Camera: NOTICE: As there is a possibility of the upper steering column cover cracking, do not apply oil, grease, etc., at the position shown in the illustration.

(a) w/o Driver Monitor Camera:

(b) w/ Driver Monitor Camera:

6. REMOVE TURN SIGNAL SWITCH ASSEMBLY WITH SPIRAL CABLE SUB-ASSEMBLY

NOTICE: Do not remove/install the spiral cable with sensor sub-assembly with the auxiliary battery connected and the ignition switch ON. Do not rotate the spiral cable with sensor sub-assembly without the steering wheel assembly installed, with the auxiliary battery connected and the ignition switch ON. Ensure that the steering wheel assembly is installed and aligned straight when inspecting the steering sensor. HINT: As the illustration shown is an example, the actual details may differ.

*a

Clamp

-

-

(1) Disconnect each connector from the turn signal switch assembly with spiral cable sub-assembly.

(2) Using pliers, expand the clamp.

(3) While holding the clamp expanded, raise the claw using a screwdriver to disengage it, and then remove the turn signal switch assembly with spiral cable sub-assembly from the steering column assembly.

7. REMOVE FRONT DOOR SCUFF PLATE LH

Click here

8. REMOVE COWL SIDE TRIM BOARD LH

Click here

9. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

Click here

10. REMOVE LOWER CENTER INSTRUMENT PANEL FINISH PANEL

Click here

11. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL ASSEMBLY

Click here

12. REMOVE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY (w/ Knee Airbag)

Click here

13. REMOVE NO. 2 KNEE PROTECTOR BRACKET (w/o Knee Airbag)

14. REMOVE FRONT NO. 1 CONSOLE BOX INSERT

Click here

15. REMOVE NO. 1 AIR DUCT

NOTICE: Be careful not to deform or damage the lower heater case of the air conditioner unit assembly when removing the No. 1 air duct.

*a	View A	-	-
	Front	-	-

16. REMOVE COLUMN HOLE COVER SILENCER SHEET

Open in this direction

Place Hand Here

17. SEPARATE NO. 2 STEERING INTERMEDIATE SHAFT ASSEMBLY

*a	Matchmark	-	-
	Separate in this direction	-	-

(1) Put matchmarks on the No. 2 steering intermediate shaft assembly and steering gear assembly.

(2) Remove the bolt.

(3) Separate the No. 2 steering intermediate shaft assembly from the steering gear assembly.

18. REMOVE NO. 2 STEERING INTERMEDIATE SHAFT ASSEMBLY

*a	Matchmark	-	-
	Remove in this direction	-	-

(1) Put matchmarks on the No. 2 steering intermediate shaft assembly and steering column assembly.

(2) Remove the bolt.

(3) Remove the No. 2 steering intermediate shaft assembly from the steering column assembly.

19. REMOVE STEERING COLUMN ASSEMBLY

HINT: As the illustration shown is an example, the actual details may differ.

(1) Disconnect each connector and disengage each wire harness clamp from the steering column assembly.

(2) Remove the bolt, 2 nuts and steering column assembly.

Disassembly

DISASSEMBLY

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

COMPONENTS (DISASSEMBLY)

Procedure		Part Name Code
1	POWER STEERING ECU ASSEMBLY	89650		-	-
2	ELECTRIC POWER STEERING MOTOR SHAFT DAMPER	45254B	-	-	-

*1	ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY	-	-
●	Non-reusable part	-	-

PROCEDURE

1. REMOVE POWER STEERING ECU ASSEMBLY

Click here

2. REMOVE ELECTRIC POWER STEERING MOTOR SHAFT DAMPER

Click here

Inspection

INSPECTION

PROCEDURE

1. INSPECT PRELOAD

(a) Using a 10 mm hexagon socket wrench, install the steering wheel assembly set bolt to the steering main shaft. NOTICE: Do not apply excessive torque to the steering wheel assembly set bolt by using a tool such as an impact wrench. The steering wheel assembly set bolt is used for turning the steering main shaft during inspection of the steering main shaft rotating torque. Remove the steering wheel assembly set bolt after performing this inspection.

(b) Secure the steering column assembly in a vise using aluminum plates, cloths and wooden blocks. NOTICE: Do not overtighten the vise, as the steering column assembly may become deformed. Support the steering column assembly with wooden blocks or similar items to ensure that it does not fall.

*a Wooden Block *b Cloth

(c) Using a torque wrench, turn the steering main shaft at a constant rate of approximately 1 revolution every 4 seconds and measure the preload. Preload Specified Condition Result 1.0 to 2.3 N*m 11 to 23 kgf*cm 9 to 20 in.*lbf N*m kgf*cm in.*lbf

(d) If the preload is not as specified, replace the power steering ECU assembly or electric power steering column sub-assembly with a new one.

(e) Remove the steering wheel assembly set bolt.

2. INSPECT STEERING COLUMN ASSEMBLY

(a) Check that the 2 bushings are securely installed to the steering column assembly.

(b) If the bushings are deformed, missing or damaged, replace the electric power steering column sub-assembly with a new one.

Reassembly

REASSEMBLY

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

COMPONENTS (REASSEMBLY)

Procedure		Part Name Code
1	ELECTRIC POWER STEERING MOTOR SHAFT DAMPER	45254B		-	-
2	POWER STEERING ECU ASSEMBLY	89650		-	-

*1	ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY	-	-
	Tightening torque for "Major areas involving basic Toyota Prius vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft.*lbf)	●	Non-reusable part
	Grease	-	-

PROCEDURE

1. INSTALL ELECTRIC POWER STEERING MOTOR SHAFT DAMPER

Click here

2. INSTALL POWER STEERING ECU ASSEMBLY

Click here

Installation

INSTALLATION

CAUTION / NOTICE / HINT

COMPONENTS (INSTALLATION)

Procedure		Part Name Code
1	ALIGN FRONT WHEELS FACING STRAIGHT AHEAD	-		-	-
2	STEERING COLUMN ASSEMBLY	-		-	-
3	INSTALL NO. 2 STEERING INTERMEDIATE SHAFT ASSEMBLY	45260		-	-
4	CONNECT NO. 2 STEERING INTERMEDIATE SHAFT ASSEMBLY	45260		-	-
5	COLUMN HOLE COVER SILENCER SHEET	45259A	-	-	-

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
6	NO. 1 AIR DUCT	87211	-	-	-

●	Non-reusable part	-	-
	N*m (kgf*cm, ft.*lbf): Specified torque	-	-

Procedure		Part Name Code
7	FRONT NO. 1 CONSOLE BOX INSERT	58816D	-	-	-
8	NO. 2 KNEE PROTECTOR BRACKET	55462C	-	-	-
9	LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY	73900		-	-
10	LOWER INSTRUMENT PANEL FINISH PANEL ASSEMBLY	55480D	-	-	-
11	LOWER CENTER INSTRUMENT PANEL FINISH PANEL	55434B	-	-	-
12	NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY	55606	-	-	-
13	COWL SIDE TRIM BOARD LH	62112	-	-	-
14	FRONT DOOR SCUFF PLATE LH	67914	-	-	-

*A	w/ Knee Airbag	*B	w/o Knee Airbag
	Tightening torque for "Major areas involving basic Toyota Prius vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft.*lbf)		N*m (kgf*cm, ft.*lbf): Specified torque

Procedure		Part Name Code
15	TURN SIGNAL SWITCH ASSEMBLY WITH SPIRAL CABLE SUB-ASSEMBLY	-		-	-
16	UPPER STEERING COLUMN COVER	45286B		-	-
17	LOWER STEERING COLUMN COVER	45287	-	-	-

*A

w/o Driver Monitor Camera

*B

w/ Driver Monitor Camera

Procedure		Part Name Code
18	ALIGN FRONT WHEELS FACING STRAIGHT AHEAD	-		-	-
19	INSPECT AND ADJUST SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY	-		-	-
20	STEERING WHEEL ASSEMBLY	45100	-	-	-
21	UPDATE ECU SECURITY KEY	-	-	-
22	ECU CONFIGURATION	-	-	-
23	POWER STEERING ECU INITIAL SETTING (TORQUE SENSOR ZERO POINT CALIBRATION AND ASSIST MAP WRITING)	-	-	-
24	END POSITION INITIAL SETTING	-	-	-

PROCEDURE

1. ALIGN FRONT WHEELS FACING STRAIGHT AHEAD

2. INSTALL STEERING COLUMN ASSEMBLY

NOTICE: Make sure that the wire harness is not interfering with the steering column assembly. HINT: As the illustration shown is an example, the actual details may differ.

(1) Install the steering column assembly with the bolt and 2 nuts.

Torque:

36 N*m (367 kgf*cm, 27 ft.*lbf)

NOTICE:

After temporarily tightening the bolt, fully tighten the 2 nuts then fully tighten the bolt.

(2) Connect each connector and engage each wire harness clamp to the steering column assembly.

3. INSTALL NO. 2 STEERING INTERMEDIATE SHAFT ASSEMBLY

*a	Matchmark	-	-
	Install in this direction	-	-

(1) Align the matchmarks on the No. 2 steering intermediate shaft assembly and steering column assembly.

(2) Install the No. 2 steering intermediate shaft assembly to the steering column assembly.

(3) Install the bolt.

Torque:

64 N·m {653 kgf·cm, 47 ft·lbf}

4. CONNECT NO. 2 STEERING INTERMEDIATE SHAFT ASSEMBLY

*a	Matchmark	-	-
	Connect in this direction	-	-

(1) Align the matchmarks on the No. 2 steering intermediate shaft assembly and steering gear assembly.

(2) Connect the No. 2 steering intermediate shaft assembly to the steering gear assembly.

(3) Install the bolt.

Torque:

64 N·m {653 kgf·cm, 47 ft·lbf}

5. INSTALL COLUMN HOLE COVER SILENCER SHEET

6. INSTALL NO. 1 AIR DUCT

Torque:

9.8 N·m {100 kgf·cm, 87 in·lbf}

7. INSTALL FRONT NO. 1 CONSOLE BOX INSERT

8. INSTALL NO. 2 KNEE PROTECTOR BRACKET (w/o Knee Airbag)

Torque:

10 N·m {102 kgf·cm, 7 ft·lbf}

9. INSTALL LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY (w/ Knee Airbag)

Click here

10. INSTALL LOWER INSTRUMENT PANEL FINISH PANEL ASSEMBLY

Click here

11. INSTALL LOWER CENTER INSTRUMENT PANEL FINISH PANEL

12. INSTALL NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

13. INSTALL COWL SIDE TRIM BOARD LH

14. INSTALL FRONT DOOR SCUFF PLATE LH

15. INSTALL TURN SIGNAL SWITCH ASSEMBLY WITH SPIRAL CABLE SUB-ASSEMBLY

NOTICE: Do not remove/install the spiral cable with sensor sub-assembly with the auxiliary battery connected and the ignition switch ON. Do not rotate the spiral cable with sensor sub-assembly without the steering wheel assembly installed, with the auxiliary battery connected and the ignition switch ON. Ensure that the steering wheel assembly is installed and aligned straight when inspecting the steering sensor. HINT: As the illustration shown is an example, the actual details may differ.

*a

Clamp

-

-

(1) Using pliers, expand the clamp.

(2) While holding the clamp expanded, install the turn signal switch assembly with spiral cable sub-assembly to the steering column assembly and engage the claw.

(3) Return the clamp to its original position.

(4) Connect the connectors to the turn signal switch assembly with spiral cable sub-assembly.

16. INSTALL UPPER STEERING COLUMN COVER

w/ Driver Monitor Camera: NOTICE: As there is a possibility of the upper steering column cover cracking, do not apply oil, grease, etc., at the position shown in the illustration.

17. INSTALL LOWER STEERING COLUMN COVER

18. ALIGN FRONT WHEELS FACING STRAIGHT AHEAD

19. INSPECT AND ADJUST SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

Click here

20. INSTALL STEERING WHEEL ASSEMBLY

Click here

21. UPDATE ECU SECURITY KEY

Click here

HINT:

After replacing the power steering ECU assembly, make sure to perform update ECU security key.

22. ECU CONFIGURATION

Click here

HINT:

After replacing the power steering ECU assembly, make sure to perform ECU configuration.

23. PERFORM POWER STEERING ECU INITIAL SETTING (TORQUE SENSOR ZERO POINT CALIBRATION AND ASSIST MAP WRITING)

Click here

24. PERFORM END POSITION INITIAL SETTING

Click here