Note On Intermittents

If an intermittent Code B111 is being set, check Code B111 snap data value for high side temperature, BD27 display. If BD27 display value is less than -22°F (-30°C), code was caused by an open in circuit No. 732, circuit No. 736 or high side temperature sensor. If BD27 display is greater than 363°F (184°C), code resulted from a short to ground on circuit No. 732 or a shorted high side temperature sensor. Manipulate related wiring while observing BD27 display. If failure is induced, reading will jump from its normal value to a reading outside the range of -22°F to 363°F (-30°C to 184°C).

If value displayed by BD27 is not reasonably close to corresponding gauge pressure reading, check for poor terminal contact or replace sensor.

Fig 1: Code B111, Schematic, A/C High Side Temperature Sensor Circuit

Fig 2: Flow Chart, Code B111, A/C High Side Temperature Sensor Circuit