Signal Too Low

ECM-6000 AIR CONDITIONING (A/C) RELAY
SIGNAL TOO LOW

Reading Diagnostic trouble code (DTC) status ECM-6000:



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 Low - Intermittent Fault


Checking connector



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

A click should be heard when the relay is activated.

Other information
- To access/replace the air conditioning (A/C) relay, Replacing Relay In the Main Fuse Box

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


Checking wiring and components



Check signal cable between control module # B44 (# B54) and air conditioning (A/C) relay # 4 for a short-circuit to ground according to [1][2]Checking Wiring and Terminals. Permanent Fault Check for an open-cicuit according to [1][2]Checking Wiring and Terminals. Permanent Fault

Check cable between ignition switch terminal 2 and fuse 5 (in the engine compartment integrated relay/fusebox) for an open-circuit 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 air conditioning (A/C) relay, Replacing Relay In the Main Fuse Box
- For information about signals, Pinout Values and Diagnostic Parameters

Was a fault found in the wiring?
Yes - Skip to "Verification
No - Continue below.


Replacing the component
Try a new air conditioning (A/C) relay. To access and replace the air conditioning (A/C) relay, Replacing Relay In the Main Fuse Box


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 - 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.