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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 701 (Electric Powertrain Control - 3.5L V6 POWERBOOST (CN) (Diagnosis & Testing - Removal & Installation)) >> Diagnosis And Testing >> Electric Powertrain Control >> Pinpoint Tests >> Pinpoint Test T: P0A37:64, P0A38, P0A39, P0A3A

Pinpoint Test T: P0A37:64, P0A38, P0A39, P0A3A

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Normal Operation and Fault Conditions 

    REFER to: Electric Powertrain Control - Component Location .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    SOBDMC P0A37:64 Generator Temperature Sensor Circuit Range/Performance: Signal Plausibility Failure This DTC sets when a temperature difference between the generator coil temp sensor and the transmission fluid and motor coil sensors.
    SOBDMC P0A38:00 Generator Temperature Sensor Circuit Low: No Sub Type Information This DTC sets when a short to ground is detected on the generator temperature sensor circuit.
    SOBDMC P0A39:00 Generator Temperature Sensor Circuit High: No Sub Type Information This DTC sets when a short to power or open is detected on the generator temperature sensor circuit.
    SOBDMC P0A3A:00 Generator Temperature Sensor Circuit Intermittent: No Sub Type Information This DTC sets from an intermittent condition in the generator temperature sensor harness.

    Possible Sources 

    • Wiring, terminals or connectors
    • Internal transmission wiring harness
    • Inverter System Controller (ISC)

  2. T1 CHECK THE AUTOMATIC TRANSMISSION FLUID LEVEL

    NOTE: A low automatic transmission fluid level may cause a traction motor over temperature condition.

    Is the transmission fluid level correct? 

    Yes  GO to  T2
    No  REFER to: Transmission Cooling .

  3. T2 CHECK THE AUTOMATIC TRANSMISSION PARAMETER IDENTIFICATIONS (PIDS)

    NOTE: A low automatic transmission fluid level may cause a traction motor over temperature condition.

    • Access the SOBDMC and monitor the TFT (Deg C) PID

    • Access the SOBDMC and monitor the GCLTEMP (Deg C) PID

    Are the PIDs within 59 deg.F (15 deg.C) of each other and stable (not changing quickly)? 

    Yes  The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition. Using a diagnostic scan tool, clear the Inverter System Controller (ISC) DTCs.
    No  GO to  T3

  4. T3 CHECK THE MOTOR COIL RESISTANCE

    • Cold soak the vehicle at ambient temperature for at least 6 hours.

    • Ignition OFF.

    • Disconnect Transmission Sensor Speed Resolver C1280.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1280 pin 12, component side
      GFD558202Courtesy of FORD MOTOR COMPANY
      		 C1280 pin 13, component side

    • Record the measurement result and compare with the expected coil temperature values below:

      • -40 deg.C (-40 deg.F) 1724.00 K ohms
      • -35 deg.C (-31 deg.F) 1236.00 K ohms
      • -30 deg.C (-22 deg.F) 896.20 K ohms
      • -25 deg.C (-13 deg.F) 657.40 K ohms
      • -20 deg.C (-4 deg.F) 487.40 K ohms
      • -15 deg.C (5 deg.F) 365.00 K ohms
      • -10 deg.C (14 deg.F) 276.100 K ohms
      • - 5 deg.C (23 deg.F) 210.70 K ohms
      • 0 deg.C (32 deg.F) 162.20 K ohms
      • 5 deg.C (41 deg.F) 125.80 K ohms
      • 10 deg.C (50 deg.F) 98.32 K ohms
      • 15 deg.C (59 deg.F) 77.45 K ohms
      • 20 deg.C (68 deg.F) 61.47 K ohms
      • 25 deg.C (77 deg.F) 49.12 K ohms
      • 30 deg.C (86 deg.F) 39.52 K ohms
      • 35 deg.C (95 deg.F) 32.00 K ohms
      • 40 deg.C (104 deg.F) 26.06 K ohms
      • 45 deg.C (113 deg.F) 21.36 K ohms
      • 50 deg.C (122 deg.F) 17.60 K ohms
      • 55 deg.C (131 deg.F) 14.58 K ohms
      • 60 deg.C (140 deg.F) 12.14 K ohms
      • 65 deg.C (149 deg.F) 10.16 K ohms
      • 70 deg.C (158 deg.F) 8541 ohms
      • 75 deg.C (167 deg.F) 7214 ohms
      • 80 deg.C (176 deg.F) 6120 ohms
      • 85 deg.C (185 deg.F) 5213 ohms
      • 90 deg.C (194 deg.F) 4459 ohms
      • 95 deg.C (203 deg.F) 3829 ohms
      • 100 deg.C (212 deg.F) 3300 ohms
      • 105 deg.C (221 deg.F) 2854 ohms
      • 110 deg.C (230 deg.F) 2478 ohms
      • 115 deg.C (239 deg.F) 2158 ohms
      • 120 deg.C (248 deg.F) 1886 ohms
      • 125 deg.C (257 deg.F) 1653 ohms
      • 130 deg.C (266 deg.F) 1453 ohms
      • 135 deg.C (275 deg.F) 1281 ohms
      • 140 deg.C (284 deg.F) 1133 ohms
      • 145 deg.C (293 deg.F) 1004 ohms
      • 150 deg.C (302 deg.F) 892.8 ohms
      • 155 deg.C (311 deg.F) 795.7 ohms
      • 160 deg.C (320 deg.F) 710.9 ohms
      • 165 deg.C (329 deg.F) 636.7 ohms
      • 170 deg.C (338 deg.F) 571.6 ohms
      • 175 deg.C (347 deg.F) 514.2 ohms
      • 180 deg.C (356 deg.F) 463.7 ohms

    Are the resistances within specification? 

    Yes  GO to  T4
    No  INSTALL a new electric motor. REFER to: Hybrid Drive Unit . CLEAR the Inverter System Controller (ISC) DTCs. REPEAT the self-test.

  5. T4 CHECK THE GENERATOR TEMPERATURE SENSOR CIRCUITS FOR AN OPEN

    • Disconnect Inverter System Controller (ISC) C1458A.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-C4
      GFD558202Courtesy of FORD MOTOR COMPANY
      		 C1280-13
      C1458A-C3
      GFD558202Courtesy of FORD MOTOR COMPANY
      		 C1280-12

    Are the resistances less than 3 ohms? 

    Yes  GO to  T5
    No  REPAIR the open circuit. CLEAR the DTCs and REPEAT the self-test.

  6. T5 CHECK THE GENERATOR TEMPERATURE SENSOR CIRCUITS FOR A SHORT TO GROUND

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-C4
      GFD558202Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-C3
      GFD558202Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10K ohms? 

    Yes  GO to  T6
    No  REPAIR the short circuit. CLEAR the DTCs and REPEAT the self-test.

  7. T6 CHECK THE TRANSMISSION SENSOR SPEED RESOLVER CIRCUITS FOR A SHORT TO VOLTAGE

    • Ignition ON.

    • Measure and record:
      Positive Lead Measurement / Action Negative Lead
      C1458A-C4
      GFD558423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C1458A-C3
      GFD558423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the short circuit. CLEAR the DTCs and REPEAT the self-test.
    No  GO to  T7

  8. T7 CHECK THE INVERTER SYSTEM CONTROLLER (ISC) PID (PARAMETER IDENTIFICATION) TEMPERATURES

    • Ignition OFF.

    • Connect Inverter System Controller (ISC) C1458A.

    • Connect Transmission Sensor Speed Resolver C1280.

    • Access the SOBDMC and monitor the GCLTEMP (Deg C) PID

    • Record the measurement result and compare with the expected coil temperature values below:

      • -40 deg.C (-40 deg.F)
      • -35 deg.C (-31 deg.F)
      • -30 deg.C (-22 deg.F)
      • -25 deg.C (-13 deg.F)
      • -20 deg.C (-4 deg.F)
      • -15 deg.C (5 deg.F)
      • -10 deg.C (14 deg.F)
      • - 5 deg.C (23 deg.F)
      • 0 deg.C (32 deg.F)
      • 5 deg.C (41 deg.F)
      • 10 deg.C (50 deg.F)
      • 15 deg.C (59 deg.F)
      • 20 deg.C (68 deg.F)
      • 25 deg.C (77 deg.F)
      • 30 deg.C (86 deg.F)
      • 35 deg.C (95 deg.F)
      • 40 deg.C (104 deg.F)
      • 45 deg.C (113 deg.F)
      • 50 deg.C (122 deg.F)
      • 55 deg.C (131 deg.F)
      • 60 deg.C (140 deg.F)
      • 65 deg.C (149 deg.F)
      • 70 deg.C (158 deg.F)
      • 75 deg.C (167 deg.F)
      • 80 deg.C (176 deg.F)
      • 85 deg.C (185 deg.F
      • 90 deg.C (194 deg.F)
      • 95 deg.C (203 deg.F)
      • 100 deg.C (212 deg.F)
      • 105 deg.C (221 deg.F)
      • 110 deg.C (230 deg.F)
      • 115 deg.C (239 deg.F)
      • 120 deg.C (248 deg.F)
      • 125 deg.C (257 deg.F)
      • 130 deg.C (266 deg.F)
      • 135 deg.C (275 deg.F)
      • 140 deg.C (284 deg.F)
      • 145 deg.C (293 deg.F)
      • 150 deg.C (302 deg.F)
      • 155 deg.C (311 deg.F)
      • 160 deg.C (320 deg.F)
      • 165 deg.C (329 deg.F)
      • 170 deg.C (338 deg.F)
      • 175 deg.C (347 deg.F)
      • 180 deg.C (356 deg.F)

    Are the temperatures stable and reasonable? 

    Yes  The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition. CLEAR the DTCs and REPEAT the self-test.
    No  INSTALL a new low voltage harness between the Inverter System Controller (ISC) and the Transmission Sensor Speed Resolver. CLEAR the DTCs and REPEAT the self-test.
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