For 1990-2009 cars

### Removal Procedure

1. Disconnect the negative battery cable.
2. Disconnect the glow plug control unit.
3. Remove the glow plug control unit retaining nut.
4. Remove the glow plug control unit.

### Installation Procedure

Notice: Refer to Fastener Notice in the Preface section.

1. Install the glow plug control unit.
2. the glow plug control unit retaining nut.

Tighten
Tighten the glow plug control unit retaining nut to 12 N·m (106 lb in).

3. Connect the glow plug control unit connector.
4. Install the negative battery cable.