Test Notes

Normal Operation

NOTE: Circuit 618 (P/LG) is riveted to the side of the RH air bag sensor case, and the case of the sensor is grounded to the vehicle at its mounting point.

The air bag diagnostic monitor measures the resistance between Pin C233-21, Circuit 618 (P/LG), and the reference ground at Pin C232-18, Circuit 570 (BK/W). If a difference of more than 3.0 ohms between the ground at Pin C232-18, Circuit 570 (BK/W), and the ground at Pin C233-21, Circuit 618 (P/LG) is measured, the air bag diagnostic monitor will store a Diagnostic Trouble Code (DTC) B1944 in memory and flash a Lamp Fault Code (LFC) 44 on the air bag indicator. Should the difference in resistance between Pin C232-18 and Pin C233-21 be repaired or otherwise reduced to less than 3.0 ohms, the DTC B1944 will be stored in memory.

Possible Causes
A high resistance reading on Pin C233.21, Circuit 618 (P/LG) or Pin C232-18, Circuit 570 (BK/W) can be caused by:
- a poor attachment of RH air bag sensor and bracket due to loose mounting, dirt or corrosion at its mounting location.
- an open or damaged wire in Circuit 618 (P/LG).
- an open wire or loose rivet inside RH air bag sensor and bracket.
- a poor reference ground at Pin C233-10 or Pin C232-18, Circuit 570 (BK/W).