Honda Civic Quiz
Powertrain

Throttle Body Carbon Accumulation Check (Except K24Z7)

In this manual: Powertrain
Accessories — 57Body — 310Chassis — 96Electrical — 15HVAC — 39Powertrain — 300Moonroof/Sunroof — 9Roof Drainage — 5Wiper Arm/Nozzle Adjustment — 1ELD Removal and Installation — 1Under-Dash Fuse/Relay Box Removal and Installation (KA KX models without Keyless Access System) — 1Under-Dash Fuse/Relay Box Removal and Installation (KA models with Keyless Access System) — 1
~1min read

Check

  1. HDS DLC - Connection

1.

Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

2.

Turn the ignition switch to ON (II).

3.

Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.

  1. THROTTLE BODY CARBON ACCUMULATION - CHECK

NOTE: If the malfunction indicator lamp (MIL) has been reported on, check for diagnostic trouble codes (DTCs).


1.

Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

2.

Check the REL TP SENSOR in the DATA LIST with the HDS. The reading should be below 2.46 deg. If it is not, clean the throttle body.

Test yourself

A quick Honda Civic quiz: every answer comes with an explanation and a link to the manual page.