Throttle Body: Testing and Inspection

Throttle Body Test

'03-05 models

NOTE:
- Do not adjust the throttle stop screw. It is preset at the factory.
- If the malfunction indicator lamp (MIL) has been reported on, check for diagnostic trouble codes (DTCs).

1. With the engine off, check the throttle cable movement. The cable should move without binding or sticking.
- If the cable moves OK, go to step 2.
- If the cable binds or sticks, check it and its routing. If the cable is faulty, reroute it or replace it, then adjust it. Go to step 2.

2. Move the throttle lever by hand to see if the throttle valve and/or shaft are too loose or too tight.
- If there is excessive play in the throttle valve shaft, or any binding in the throttle valve at the fully closed or fully opened position, replace the throttle body.
- If the throttle valve and shaft are OK, go to step 3.

3. Connect the HDS to the data link connector (DLC).
4. Turn the ignition switch ON (II).
5. Check the throttle position with the HDS. The reading should be about 0° (REL), 0 % (REL) or 0.5 V when the throttle is fully closed and about 80° (REL), 89 % (REL) or 4.5 V when the throttle is fully opened.
- If the throttle position is correct, the throttle body is OK.
- If the throttle position is not correct, replace the throttle body.

'06-07 models

Carbon Accumulation Check

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

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 ON (II).
3. Make sure the HDS communicates with the ECM/PCM. If it doesn't, go to the DLC circuit troubleshooting. Testing and Inspection
4. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
5. Check the REL TP SENSOR in the DATA LIST with the HDS. The reading should be below 2.46 ° . If it is not, clean the throttle body.

Throttle Position Learning Check

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