Remedy 2

1. Disconnect connector H4-10 (H4-11), then using ohmmeter, measure wiring resistance to front sensor as follows:
a. On front sensor 1, measure between pin 1 and ground, pin 3 and ground.
b. On front sensor 2, measure between pin 1 and ground, pin 2 and ground.
c. If any resistance values are equal to or less than 5700 ohms, the fault could be in the wiring between connector H4-10 (H4-11) and H3-16 (H3-17) or in wiring between connector H3-16 (H3-17) and front sensor. Proceed to step 2.
d. If all resistance values are greater than 5700 ohms, proceed to step 4.
2. Disconnect connector H3-16 (H3-17). Using ohmmeter at connector H4-10 (H4-11), measure wiring resistance to front sensor as follows:
a. On front sensor 1, measure between pin 1 and ground, pin 3 and ground.
b. On front sensor 1, measure between pin 1 and pin 2, pin 3 and pin 2.
c. On front sensor 2, measure between pin 1 and ground, pin 2 and ground.
d. On front sensor 2, measure between pin 1 and pin 3, pin 2 and pin 3.
e. If any resistance values are equal to or less than 5700 ohms, the fault is in wiring between connector H4-10 (H4-11) and H3-16 (H3-17).
f. If all resistance values are greater than 5700 ohms, proceed to step 3.
3. Measure from connector H3-16 (H3-17) to front sensor as follows:
a. Measure between pin 1 and ground, pin 3 and ground.
b. Measure between pin 1 and pin 2, pin 3 and pin 2.
c. If either resistance values is less than 5700 ohms, the fault is in the front sensor. Install new sensor.
4. The fault could be in the wiring between connector H4-10 (H4-11) and electronic unit.