Signal Too Low
Signal too low
Diagnostic trouble code (DTC) status ECM-6000Air conditioning (A/C) relay. Signal too low
Reading off diagnostic trouble code (DTC) status ECM-6000:
Note! When reading off the diagnostic trouble code (DTC) status, other stored diagnostic trouble codes (DTCs) and their status will be listed.
- Read off 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) permanent?
Yes - Checking the connector
No - Intermittent fault
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Intermittent fault
Signal too low. Intermittent fault
Checking wiring and connectors
Check control module and air conditioning (A/C) pressure sensor connector for contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check signal cable between control module #B44 (#B54) and air conditioning (A/C) relay #4 for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Check cable between air conditioning (A/C) relay #2 and fuse 5 (in the engine compartment integrated relay/fusebox) for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box.
- To access/replace the control module, see the relevant service procedure.
- To access/replace the air conditioning (A/C) relay, see
- To localize the outside temperature sensor, see Location of components Locations.
- For information about signals, see Signal specification Signal Description / Specification.
Continue - Fault-tracing information
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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
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Attempt New Test - Checking wiring and connectors
FAULT FOUND - DONE
DONE - DONE
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DONE - DONE
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Checking the connector
- Ignition off
- Check the air conditioning (A/C) relay connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Reinstall components, reconnect connectors etc.
- Ignition on
- Activate the air conditioning (A/C) relay.
A click should be heard when the relay is activated.
Other information:
- To access or replace the air conditioning (A/C) relay, see the relevant service procedure.
Is the function OK?
Yes - Fault Found
No - Checking the wiring and component
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Checking the wiring and component
Check the cable between control module terminal #B44 (#B54) and air conditioning (A/C) relay terminal #4. Check for a short-circuit to ground. See Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check for an open-circuit. See Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the cable between air conditioning (A/C) relay terminal #2 and fuse 5 (in the engine compartment integrated relay / fusebox). Check for an open-circuit. See Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access and replace the air conditioning (A/C) relay, see
- For information about signals, see Signal specification Signal Description / Specification.
Was a fault found in the wiring?
Yes - Verification
No - Replacing the component
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Replacing the component
Try a new air conditioning (A/C) relay. To access and replace the air conditioning (A/C) relay, see the relevant service procedure.
Continue - Verification
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Verification
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components
- Ignition on.
- Activate air conditioning (A/C) relay.
A click should be heard from the relay when it is activated.
Is the function OK?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - Fault Found
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Fault-tracing information
Information
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.
Do you want to exit fault-tracing?
YES: Troubleshooting is complete for this DTC
NO: Repeat Procedure.
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