Fault Code 41, Tester Code 42

Fig. 7 TDC Sensor Signal:

1. Locate RPM/TDC sensor at lower right hand front of engine.
2. Inspect sensor and sprocket for damage and dirt deposits.
3. Check sensor-to-sprocket clearance is .5-1 mm.
4. Connect a suitable oscilloscope to sensor connector terminals 1 and 2. Ensure TDC signal always starts with negative amplitude as shown in Fig. 7. Signal voltage should be greater than 1190 mV at 4160 RPM. A very low or no signal indicates sensor inaccuracy.
5. Check sensor winding resistance is 486-594 ohms.
6. Inspect sensor connector and wires to ECU terminals 23 and 25 for damage.
7. Replace sensor as required.