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 MANUALSVOLVO1997850 L5-2.4L VIN 55 B5254SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONDIAGNOSTIC TROUBLE CODE DESCRIPTIONSMANUFACTURER CODE CHARTSENGINE CONTROL SYSTEMDETAILED DTC DESCRIPTIONSDTC EFI-535 IGNITION DISCHARGE MODULE GROUP E
1997 Volvo 850 L5-2.4L VIN 55 B5254S
DTC EFI-535 Ignition Discharge Module Group E
1997 Volvo 850 L5-2.4L VIN 55 B5254SSECTION DTC EFI-535 Ignition Discharge Module Group E
5-3-5 IGNITION DISCHARGE MODULE GROUP E
Trouble Code Conditions
- Diagnostic trouble code (DTC) EFI-535 Ignition discharge module (IDM) group E is stored if the engine control module (ECM) registers a fault in the A/C relay or pulsed secondary air injection system (PAIR) pump relay circuits.
Substitute value(s)
- The ignition discharge module is shut off until the fault has disappeared.
Possible source(s)
- Short-circuit to supply voltage in A/C relay signal cable.
- Defective A/C relay.
Fault symptom(s)
- A/C does not work, depending on fault source
Trouble Code Conditions
- Diagnostic trouble code (DTC) EFI-535 Ignition discharge module (IDM) group E is stored if the engine control module (ECM) registers a fault in the A/C relay or pulsed secondary air injection system (PAIR) pump relay circuits.
Substitute value(s)
- The ignition discharge module is shut off until the fault has disappeared.
Possible source(s)
- Short-circuit to supply voltage in A/C relay signal cable.
- Defective A/C relay.
Fault symptom(s)
- A/C does not work, depending on fault source
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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.