Toyota CH-R Service Manual: Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during the horn button assembly removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced

Replacement Part or Procedure

Necessary Procedures

Effects/Inoperative when not performed

Link

Disconnect cable from negative battery terminal

Memorize steering angle neutral point

Lane departure alert system (w/ Steering Control)

Pre-collision system

Initialize back door lock

Power door lock control system

PROCEDURE

1. PRECAUTION

CAUTION:

Be sure to read Precaution thoroughly before servicing.

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NOTICE:

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

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CAUTION:

  • Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
  • If an SRS part is accidentally deployed, it may cause a serious injury.

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

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3. REMOVE HORN BUTTON ASSEMBLY

CAUTION:

When storing the horn button assembly, keep the airbag deployment side facing upward.

Deployment Side

(a) Check that the ignition switch off.

(b) Check that the cable is disconnected from the negative (-) battery terminal.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Turn the steering wheel assembly 90° to the left.

(d) Wrap protective tape around a 6 mm hexagon wrench as shown in the illustration.

*a

55 mm (2.17 in.)

*b

95 mm (3.74 in.)

Protective Tape

HINT:

Use a 6 mm hexagon wrench with a long arm length of approximately 95 mm (3.74 in.).

(e) Insert the 6 mm hexagon wrench into the service hole until the protective tape is at the position shown in the illustration.

HINT:

Make sure to insert the 6 mm hexagon wrench into the service hole on the backside of the steering wheel assembly.

*a

Housing Tab

*b

Omega Spring

Protective Tape

(f) Using the 6 mm hexagon wrench, push down the housing tab to disengage the hook as shown in the illustration.

HINT:

Pushing down the housing tab will push the omega spring and disengage it from the hook.

*a

Housing Tab

*b

Omega Spring

(g) Turn the steering wheel assembly 180° to the right.

(h) Insert the 6 mm hexagon wrench into the service hole until the protective tape is at the position shown in the illustration.

HINT:

Make sure to insert the 6 mm hexagon wrench into the service hole on the backside of the steering wheel assembly.

*a

Housing Tab

*b

Omega Spring

Protective Tape

(i) Using the 6 mm hexagon wrench, push down the housing tab to disengage the hook as shown in the illustration.

NOTICE:

Lightly hold the horn button assembly so that it does not fall.

HINT:

Pushing down the housing tab will push the omega spring and disengage it from the hook.

*a

Housing Tab

*b

Omega Spring

(j) Check that each hook is disengaged.

HINT:

If a hook is disengaged, the spring will be visible at the location shown in the illustration.

*a

Spring

(k) Turn the steering wheel assembly 90° to the right.

(l) Using a 6 mm hexagon wrench, push the housing tab to disengage the hook as shown in the illustration.

NOTICE:

Lightly hold the horn button assembly so that it does not fall.

HINT:

  • Insert the 6 mm hexagon wrench into the service hole until it contacts the hook and then push down the housing tab while pushing it toward the rear of the vehicle.
  • Pushing down the housing tab will disengage it from the hook.

*a

Housing Tab

*b

Hook

(m) Turn the steering wheel assembly 180° to the left to align the front wheels facing straight ahead.

NOTICE:

Do not drop the horn button assembly.

(n) Pull out the horn button assembly from the steering wheel assembly and hold the horn button assembly with one hand.

NOTICE:

When separating the horn button assembly, do not pull the airbag wire harness.

(o) for Single Type:

(1) Disconnect the horn connector from the horn button assembly.

*a

Airbag Connector

*b

Horn Connector

*c

Airbag Connector Lock

*d

Protective Tape

*e

Wire Harness Clamp

(2) Using a screwdriver with its tip wrapped in protective tape, release the airbag connector lock.

(3) Disconnect the airbag connector.

(4) Disengage the wire harness clamp to remove the horn button assembly

NOTICE:

When disconnecting any airbag connector, take care not to damage the airbag wire harness.

(p) for Dual Type:

(1) Disconnect the horn connector from the horn button assembly.

*a

Airbag Connector

*b

Horn Connector

*c

Airbag Connector Lock

*d

Protective Tape

*e

Wire Harness Clamp

(2) Using a screwdriver with its tip wrapped in protective tape, release the 2 airbag connector locks.

(3) Disconnect the 2 airbag connectors.

(4) Disengage the wire harness clamp to remove the horn button assembly

NOTICE:

When disconnecting any airbag connector, take care not to damage the airbag wire harness.

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