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-23X0SIGNAL MISSING - INTERMITTENT FAULT
2001 Volvo C70 Coupe L5-2.3L Turbo VIN 53 B5234T3
Signal Missing - Intermittent Fault
2001 Volvo C70 Coupe L5-2.3L Turbo VIN 53 B5234T3SECTION Signal Missing - Intermittent Fault
ECM-23X0 INJECTOR X
SIGNAL MISSING - INTERMITTENT FAULT
Checking cables and connectors
Check injector connector for contact resistance and oxidation according to Checking Wiring and Terminals and loose connections according to Checking Wiring and Terminals
Check cable between injector terminal 2 and control module:
- # A16 (# A16) (ECM 2310)
- # A34 (# A34) (ECM 2320)
- # A15 (# A15) (ECM 2330)
- # A33 (# A33) (ECM 2340)
- # A14 (# A14) (ECM 2350)
and power supply between system relay terminal 3 and injector terminal 1 for an intermittent open-circuit according to Checking Wiring and Terminals
Other information
- Connecting the breakout box/accessing the control module, Connecting the Breakout Box (ECM)
- To access/replace the injector, Injectors/Pulsation Dampers, Replacing
- For information about signals, see Diagnostic Parameters and Pinout Values. Pinout Values and Diagnostic Parameters
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
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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.