Signal Too High

ECM-5000 AIR CONDITIONING (A/C) PRESSURE SENSOR
SIGNAL TOO HIGH

Reading Diagnostic trouble code (DTC) status ECM-5000:



Note! When Reading the Diagnostic trouble code (DTC) status, other stored diagnostic trouble codes (DTCs) and their status will be listed.

- Read diagnostic trouble code (DTC) status. Check the status of the relevant Diagnostic Trouble Code (DTC).

Was the status of the relevant Diagnostic Trouble Code (DTC) displayed as permanent?
Yes - Continue below.
No - Signal Too High - Intermittent Fault


Checking connector



- Ignition off.
- Check air conditioning (A/C) pressure sensor connector for contact resistance and oxidation according to [1][2]Checking Wiring and Terminals. Permanent Fault
- Reinstall components, reconnect connectors etc.
- Ignition on.
- Read air conditioning (A/C) pressure sensor signal.

Check that the signal is within its permitted range. The voltage should be between 0.7 - 0.9 V.

If signal is now OK this indicates that the fault was caused by poor contact in the connector.

Is the signal OK?
Yes - Skip to "Verification">
No65G- Continue below.


Checking wiring and components



Check cable between control module # A2 1 (# A2 1) and air conditioning (A/C) pressure sensor terminal 2 for an open-circuit according to [1][2]Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Permanent Fault

Check cable between control module # A58 (# A58) and air conditioning (A/C) pressure sensor terminal 3 for an open-circuit according to [1][2]Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Permanent Fault

Remedy as necessary.

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

Is the signal OK?
Yes - Skip to "Verification">
No65G- Continue below.


Replacing component



Try a new air conditioning (A/C) pressure sensor according to Pressure Switch/Pressostat, Replacing


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components
- Ignition on.
- Read air conditioning (A/C) pressure sensor signal.

The signal should be between 0.7 - 0.9 V.

Is the signal OK?
Yes - Testing Complete.
No - Continue below.


Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.