Signal Too High

ECM-6120 ENGINE COOLING FAN RELAY, HIGH SPEED
SIGNAL TOO HIGH

Reading off Diagnostic trouble code (DTC) status ECM-6120:



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) displayed as permanent?
Yes - Skip to "Checking Cables"
No - Continue below.


Checking for intermittent fault



- Ignition on.
- Activate engine cooling fan (FC), high-speed.

Check that engine cooling fan (FC) starts and runs at high-speed.

Does the engine cooling fan (FC) start and run at high-speed?
Yes - Skip to "Verification"
No - Continue below.


Checking Cables



- Ignition off.

Check cable between #A6 and engine cooling fan (FC) relay connector terminal In 2 for 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 engine cooling fan (FC) relay, Replacing Relay In the Main Fuse Box


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
- Activate engine cooling fan (FC), high-speed.

Does the engine cooling fan (FC) start?
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.