Signal Too Low - Intermittent Fault

ECM-5000 AIR CONDITIONING (A/C) PRESSURE SENSOR
SIGNAL TOO LOW - INTERMITTENT FAULT

Checking wiring and connectors



Check signal cable between engine control module (ECM) # A21 (# A21) and air conditioning (A/C) pressure sensor terminal 2 for an intermittent short-circuit to ground according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Other information:
- To connect the breakout box, Connecting the Breakout Box (ECM)
- To access/replace the control module, Engine Control Module (ECM), Replacing
- To access/replace air conditioning (A/C) pressure sensor, Pressure Switch/Pressostat, Replacing
- For information about signals, Pinout Values and Diagnostic Parameters


Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.