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ACR2000 (J-43600) Hose Flush Procedure: Notes

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IMPORTANT:
  • The following hose flushing procedure must be performed every time the ACR2000 (J-43600) is used on the hybrid vehicles. It must be completed before the ACR2000 (J-43600) is connected to the vehicle to begin a diagnostic or service procedure.
  • The high voltage (HV) electric air conditioning (A/C) compressor on these two-mode hybrid vehicles uses a polyester (POE) refrigerant oil instead of a pollyalkylene glycol (PAG) synthetic refrigerant oil. This is due to the better electrical resistance of the POE oil and its ability to provide HV isolation.
  • The following hose flush procedure is required to prevent oil cross-contamination. Laboratory testing has shown that flushing the ACR2000 (J-43600) using the following procedure will minimize oil cross-contamination to a negligible amount (<500ppm).
  • Failure to flush the ACR2000 (J-43600) hoses before adding refrigerant to a hybrid vehicle with an electric A/C compressor may result in an unacceptable amount of PAG oil entering the refrigerant system. It may also cause a battery energy control module hybrid battery voltage system isolation lost diagnostic trouble code (DTC P1AE7) to be set. Additionally the A/C system warranty will be voided.
  • The ACR2000 (J-43600) will need to be retrofitted with a J-43600-50 (Hose-ACR2000 Oil Flush Loop) to be able to perform the following procedure. All hybrid dealers will receive a J-43600-50, with installation instructions, which is a component of the hybrid essential tool package. Dealers not included in the hybrid marketing plan and needing to service a hybrid vehicle can obtain the J-43600-50 from SPX Kent Moore, 1-800-GM-TOOLS (1-800-468-6657).
    • The J-43600-50 Retrofit Kit replaces the existing hose mount fittings on the ACR2000. Installation instructions are included to properly update the ACR2000 for hybrid vehicle A/C service.
    • New hybrid compliant A/C refrigerant recharging equipment (GE-48800) will be released in January 2008 for dealers to replace current ACR2000 equipment. GE-48800 meets new SAE refrigerant recovery standard J-2788 and is specially designed for GM hybrid vehicle A/C service.
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