DTC 0101
DESCRIPTION
The camshaft position sensor is a basic component of the ECCS. It monitors engine speed and piston position. These input signals to the ECM are used to control fuel injection, ignition timing and other functions.
The camshaft position sensor has a rotor plate and a wave-forming circuit. The rotor plate has 360 slits for a 1° signal and 4 slits for a 180° signal. The wave-forming circuit consists of Light Emitting Diodes (LED) and photo diodes.
The rotor plate is positioned between the LED and the photo diode. The LED transmits light to the photo diode. As the rotor plate turns, the slits cut the light to generate rough-shaped pulses. These pulses are converted into on-off signals by the wave-forming circuit and sent to the ECM.
DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
NOTE:
- Before performing the following procedure, confirm that battery voltage is more than 10.5V.
WITH CONSULT
1. Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT.
2. Start engine and run it for at least 2 seconds at idle speed.
OR
WITH GST
1. Start engine and run it for at least 2 seconds at idle speed.
2. Select "MODE 3" with GST.
OR
WITH NO TOOLS
1. Start engine and run it for at least 2 seconds at idle speed.
2. Turn ignition switch "OFF", wait at least 5 seconds III and then turn "ON".
3. Perform Diagnostic Test Mode II (Self-diagnostic results) with ECM.
WIRING DIAGRAM
DIAGNOSTIC PROCEDURE - DETECTABLE CIRCUIT
DIAGNOSTIC PROCEDURE - NON-DETECTABLE CIRCUIT
COMPONENT INSPECTION
1. Start engine.
2. Check voltage between camshaft position sensor terminals (3), (4) and ground with AC range.
*: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
If NG, replace distributor assembly with camshaft position sensor.
3. Remove distributor cap and visually check signal plate for damage or dust.
NOTE: After this inspection, diagnostic trouble code PO34O might be displayed with camshaft position sensor functioning properly. Erase the stored memory.