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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1200 (HVAC - Climate Control System - General Information And Diagnostics - (Hybrid)) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test J: DTC P0AFA:16 or P0AFB:17 >> Pinpoint Test J: DTC P0AFA:16 Or P0AFB:17

Pinpoint Test J: DTC P0AFA:16 Or P0AFB:17

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Before carrying out the following test, diagnose any PCM DTCs.
  1. J1 COMPARE THE ACCM HIGH VOLTAGE PID WITH THE BCM HIGH VOLTAGE PID 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Battery Pack Voltage (V_PACK) Battery Control Module (BCM) PID.
    • Enter the following diagnostic mode on the scan tool: Electric A/C Compressor High Voltage Supply (ACCM_CHVS) Air Conditioning Compressor Module (ACCM) PID.
    • Compare the V_PACK BCM PID voltage with the ACCM_CHVS ACCM  PID voltage.
    • Are both voltages approximately the same? 
    • Yes:  CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. If the DTCs return  , INSTALL a new ACCM  . REFER to AIR CONDITIONING (A/C) COMPRESSOR -- HYBRID . TEST the system for normal operation. If the DTCs do not return  , the system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
    • No:  GO to J2  .
  2. J2 CHECK CIRCUIT HYT03 (OG) FOR AN OPEN 
    WARNING: To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage hybrid system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.
    • Ignition OFF.
    • Depower the high-voltage traction battery system. For additional information, refer to HIGH-VOLTAGE TRACTION BATTERY SYSTEMS DEPOWERING .
    • Disconnect: BCM C4227B.
    • Disconnect: ACCM  C1469B.
    • Disconnect: Transmission Control Module (TCM) C1458D.
    • Measure the resistance between ACCM  C1469B, circuit HYT03 (OG), harness side and BCM  C4227B, circuit HYT03 (OG), harness side
      Fig 1: Checking Circuit HYT03 (OG) For An Open
      G06394445Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  INSPECT the ACCM  for loose or corroded connections. If OK, INSTALL a new ACCM  . REFER to AIR CONDITIONING (A/C) COMPRESSOR -- HYBRID . TEST the system for normal operation.
    • No:  INSPECT the high-voltage harness for damage. If the high-voltage harness is damaged  , INSTALL a new high-voltage harness only. If the high-voltage harness is not damaged  , INSTALL a new high-voltage harness and INSTALL a new ACCM  . REFER to AIR CONDITIONING (A/C) COMPRESSOR -- HYBRID . TEST the system for normal operation.
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