Honda Pilot: Under-Floor TWC Removal and Installation

Removal/Installation

1. Engine Undercover - Remove

2. Front Subframe Stiffener Plate - Remove

3. Front Secondary HO2S (Sensor 2) - Remove

4. Under-Floor TWC - Remove

1. Remove the under-floor TWC (A) and the gaskets (B).
2. Remove the under-floor TWC covers (C).

5. All Removed Parts - Install

1. Install the parts in the reverse order of removal with new gaskets and new self-locking nuts.

Under-Hood Fuse/Relay Box Removal and Installation

Removal/Installation

NOTE: The under-hood fuse/relay box is a part of the engine compartment wire harness, and it cannot be replaced by itself.

1. 12 Volt Battery Terminal - Disconnect

2. Relay Circuit Board - Remove

3. Under-Hood Fuse/Relay Box - Remove

1. Disconnect the cables (A).
2. Remove the under-hood fuse/relay box (B) from the brackets (C).
3. Cut the band (D).
4. Remove the bottom cover (E) from the under-hood fuse/relay box.
5. Carefully remove the relays using the relay puller tool.

   NOTE: Do not use pliers. Pliers will damage the relays, which could cause the engine to stall or not start or cause other functions to fail.

4. All Removed Parts - Install

1. Install the parts in the reverse order of removal.

Special Tool Required

• Relay Puller 07AAC-000A2A1 or 07AAC-000A1A0

Under-Dash Fuse/Relay Box Removal and InstallationUSB Adapter Removal and Installation