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Home >> Audi >> 2018 >> A6 Premium Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 130 (Hybrid Control System (Diagnostic Codes (P0069-273 - P0A75-336))) >> Hybrid Control System >> DTC P0516-769: Battery Temperature Sensor Circuit Low; DTC P0517-770: Battery Temperature Sensor Circuit High [08/2013 - ] >> Procedure

DTC P0516-769: Battery Temperature Sensor Circuit Low; DTC P0517-770: Battery Temperature Sensor Circuit High [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR) See step   3 

    NG → CONNECT SECURELY 

    OK: Go to next step 

  2. READ VALUE USING TECHSTREAM (AUXILIARY BATT TEMPERATURE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Auxiliary Batt Temperature.
    4. Read the Data List.

      Result

      Result Proceed to
      -40°C (-40°F) A
      215°C (419°F) B
      Same as actual temperature C
    5. Turn the power switch off.

    B → See step   5 

    C → See step   7 

    A: Go to next step 

  3. READ VALUE USING TECHSTREAM (CHECK FOR OPEN) 
    1. Disconnect the Q18 thermistor assembly connector.
      GTY404030Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect terminals 2 (THB) and 1 (E2) of vehicle side connector Q18 of the thermistor assembly.
      GTY406003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Connect the Techstream to the DLC3.
    4. Turn the power switch on (IG).
    5. Enter the following menus: Powertrain / Hybrid Control / Data List / Auxiliary Batt Temperature.
    6. Read the Data List.

      Result

      Tester Display Condition Specified Condition
      Auxiliary Batt Temperature Terminals THB and E2 connected.
      Power switch on (IG)      		 215°C (419°F)
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Thermistor Assembly)
    7. Turn the power switch off.
    8. Reconnect the Q18 thermistor assembly connector.

    NG → See step   4 

    OK → REPLACE THERMISTOR ASSEMBLY 

  4. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - THERMISTOR ASSEMBLY) 
    1. Connect terminals 28 (THB) and 30 (ETHB) of connector H1 of the power management control ECU.
      GTY410409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the Techstream to the DLC3.
    3. Turn the power switch on (IG).
    4. Enter the following menus: Powertrain / Hybrid Control / Data List / Auxiliary Batt Temperature.
    5. Read the Data List.

      Result

      Tester Display Condition Specified Condition
      Auxiliary Batt Temperature Terminals THB and ETHB connected.
      Power switch on (IG)      		 215°C (419°F)
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Power Management Control ECU)
    6. Turn the power switch off.

    NG → See step   8 

    OK → REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. READ VALUE USING TECHSTREAM (CHECK FOR SHORT) 
    1. Disconnect the Q18 thermistor assembly connector.
      GTY404030Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect the Techstream to the DLC3.
    3. Turn the power switch on (IG).
    4. Enter the following menus: Powertrain / Hybrid Control / Data List / Auxiliary Batt Temperature.
    5. Read the Data List.

      Result

      Tester Display Condition Specified Condition
      Auxiliary Batt Temperature Power switch on (IG) -40°C (-40°F)
    6. Turn the power switch off.
    7. Reconnect the Q18 thermistor assembly connector.

    NG → See step   6 

    OK → REPLACE THERMISTOR ASSEMBLY 

  6. CHECK HARNESS AND CONNECTOR (THERMISTOR ASSEMBLY - POWER MANAGEMENT CONTROL ECU) 
    1. Disconnect the Q18 thermistor assembly connector.
    2. Disconnect the H1 power management control ECU connector.
      GTY411915Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      Q18-2 (THB) - H1-28 (THB) Power switch off Below 1 Ω
      Q18-1 (E2) - H1-30 (ETHB) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      Q18-2 (THB) or H1-28 (THB)- Body ground and other terminals Power switch off 10 kΩ or higher
      Q18-1 (E2) or H1-30 (ETHB)- Body ground and other terminals Power switch off 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Thermistor Assembly)
      *b Rear view of wire harness connector
      (to Power Management Control ECU)
    4. Reconnect the Q18 thermistor assembly connector.
    5. Reconnect the H1 power management control ECU connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   8 

  7. CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [08/2013 - ] 
  8. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to  COMPONENTS [08/2013 - ] 
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