Onan HGJAA-HGJAF error code 33
NOT ASSIGNED. If seeing blink pattern that looks like 33, it is actually first-level code 3 (Service Check) - press STOP once to reveal the actual two-digit fault.
What to check, and in what order, is in the app. A step-by-step flow walks this code with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Cummins-Onan Service Manual (document 0983-0501 Issue 26, March 2018, 202 pp) covering HGJAA Spec A-E / HGJAB A-E / HGJAC A-C / HGJAD A-E / HGJAE A-E / HGJAF A-C (rv-tech-resources/25-onan-hgjaa/0983-0501_Onan_HGJAA-HGJAF_Service_Manual_Issue_26.pdf)
- Onan HGJAA Generator Technician Service Diagnostic Reference (rv-tech-resources/25-onan-hgjaa/Onan_HGJAA_Generator_Technician_Service_Diagnostic_Reference.md)
Related codes
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- 27 (Voltage Sense Lost)Controller unable to sense output voltage (sense lead open, blown…
- 29 (High Battery Voltage)Voltage across battery system greater than 19 VDC.
- 32 (Low Cranking Speed)Cranking too slow: quadrature frequency ≤3 Hz AND engine RPM ≤100 RPM…
- 35 (Control Card Failure)Microprocessor EEPROM error during self-test.
- 36 (Engine Stopped Without Fault)Engine stopped without command by controller. Manual logic: RPM less…
- 37 (Invalid Configuration)Wrong frequency/RPM ratio detected (configuration mismatch).
- 38 (Field Overload / Overcurrent)Field voltage F1-F2 greater than 150 VDC for 10 continuous seconds.