Signal Too Low. Intermittent Fault

Signal too low. Intermittent fault

Checking the wiring
Check the engine control module (ECM) and air conditioning (A/C) pressure sensor connectors. Check for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
Check in particular for damage or loose terminal pins.
Check the signal cable between engine control module (ECM) terminal #14 and air conditioning (A/C) pressure sensor terminal 2. Check for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
Check the power supply cable between engine control module (ECM) terminal #74 and air conditioning (A/C) pressure sensor terminal 3. Check for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
Remedy as necessary.

Hint: The diagnostic trouble code (DTC) may be caused by low temperatures despite there being no faults.

Other information:
- To connect the breakout box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000
- To replace the air conditioning (A/C) pressure sensor, see Replacing the air conditioning (A/C) system pressure sensor Replacing The Air Conditioning (A/C) System Pressure Sensor.













Select Continue.

Continue - Fault-tracing information

-------------------------------------------------

Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - FAULT FOUND

------------------------

Attempt New Test - Checking the wiring

FAULT FOUND - DONE

-------------------------------------------------