Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLVO2001C70 COUPE L5-2.3L TURBO VIN 53 B5234T3REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSECM CODES (ENGINE CONTROL MODULE)ECM-6100SIGNAL TOO HIGH
2001 Volvo C70 Coupe L5-2.3L Turbo VIN 53 B5234T3
Signal Too High
2001 Volvo C70 Coupe L5-2.3L Turbo VIN 53 B5234T3SECTION Signal Too High
ECM-6100 ENGINE COOLING FAN CONTROL MODULE
SIGNAL TOO HIGH
Reading off Diagnostic trouble code (DTC) status ECM-6100:
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 Components and Wiring - Permanent"
No - Continue below.
Checking component and wiring
Check cable between engine control module (ECM) #A7 (#A7) and engine cooling fan (FC) control module #1B for an intermittent short-circuit to supply voltage according to Checking Wiring and Terminals
Remedy as necessary
Other information:
- Connecting the breakout box/accessing the control module, Connecting the Breakout Box (ECM)
- For information about signals, Pinout Values and Diagnostic Parameters
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
--Testing Complete.--
Checking Components and Wiring - Permanent
Check the cable between engine control module (ECM) terminal #A7 (#A7) and engine cooling fan (FC) control module terminal #1B. Check for a short-circuit to supply voltage. according to Checking Wiring and Terminals
Remedy as necessary
Other information:
- Connecting the breakout box/accessing the control module, Connecting the Breakout Box (ECM)
- For information about signals, Pinout Values and Diagnostic Parameters
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Activate the engine cooling fan (FC). Check that all the 3 engine cooling fan (FC) speeds function.
Is the engine cooling fan (FC) working?
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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.