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Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Four Wheel Drive (4WD) Systems) >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems >> Pinpoint Tests >> Pinpoint Test D: DTCs P1824 and P1825 >> PINPOINT TEST D: DTCs P1824 AND P1825

PINPOINT TEST D: DTCs P1824 AND P1825

WARNING: This page is about a different variant/trim than selected.
NOTE: Carry out a thorough INSPECTION AND VERIFICATION  as outlined before carrying out this pinpoint test.
  1. D1 CHECK FOR 4X4 CONTROL MODULE DTCs 
  2. D2 CHECK CIRCUITS CCF21 (VT/WH) AND RCF21 (WH/VT) FOR A SHORT TO GROUND WITH ATC SOLENOID (PART OF REAR AXLE) CONNECTED 
    • Ignition OFF.
    • Disconnect: 4X4 Control Module C3253.
    • Measure the resistance between 4X4 control module C3253-8, circuit CCF21 (VT/WH), harness side and ground; and between 4X4 control module C3253-16, circuit RCF21 (WH/VT), harness side and ground.
      Fig 1: Checking Circuits CCF21 (VT/WH) And RCF21 (WH/VT) For Short To Ground With ATC Solenoid Connected
      G06064360Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes:  GO to  D5.
    • No:  GO to D3.
  3. D3 CHECK CIRCUITS CCF21 (VT/WH) AND RCF21 (WH/VT) FOR A SHORT TO GROUND WITH C3051 DISCONNECTED 
    • Disconnect: ATC Solenoid Jumper Harness C3051.
    • Measure the resistance between 4X4 control module C3253-8, circuit CCF21 (VT/WH), harness side and ground; and between 4X4 control module C3253-16, circuit RCF21 (WH/VT), harness side and ground.
      Fig 2: Checking Circuits CCF21 (VT/WH) And RCF21 (WH/VT) For Short To Ground With C3051 Disconnected
      G06064360Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10, 000 ohms? 
    • Yes:  GO to D4.
    • No:  REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  4. D4 CHECKING THE ATC SOLENOID JUMPER HARNESS 
    NOTE: The Active Torque Coupling (ATC) solenoid jumper harness must be secured to prevent damage to the wiring.
    • Disconnect: ATC Solenoid C3254.
    • Inspect the ATC solenoid jumper harness for damage.
    • Is the ATC solenoid jumper harness damaged? 
    • Yes:  REPAIR or INSTALL a new ATC solenoid jumper harness. CLEAR the DTCs. REPEAT the self-test.
    • No:  INSTALL a new rear axle assembly. REFER to REAR DRIVE AXLE/DIFFERENTIAL . CLEAR the DTCs. REPEAT the self-test.
  5. D5 CHECK CIRCUITS CCF21 (VT/WH) AND RCF21 (WH/VT) FOR AN OPEN WITH ATC SOLENOID CONNECTED 
    • Connect: ATC Solenoid C3254 and ATC Solenoid Jumper Harness C3051.
    • Measure the resistance between 4X4 control module C3253-8, circuit CCF21 (VT/WH), harness side and 4X4 control module C3253-16, circuit RCF21 (WH/VT), harness side.
      Fig 3: Checking Circuits CCF21 (VT/WH) And RCF21 (WH/VT) For Open With ATC Solenoid Connected
      G06064362Courtesy of FORD MOTOR CO.
    • Is the resistance less than 10 ohms? 
    • Yes:  GO to  D8.
    • No:  GO to D6.
  6. D6 CHECK CIRCUITS CCF21 (VT/WH) AND RCF21 (WH/VT) FOR AN OPEN AT C3051 
    • Disconnect: ATC Solenoid Jumper Harness C3051.
    • Measure the resistance between 4X4 control module C3253-8, circuit CCF21 (VT/WH), harness side and ATC solenoid jumper harness C3051-1, circuit CCF21 (VT/WH).
      Fig 4: Checking Circuits CCF21 (VT/WH) For Open At C3051
      G06064363Courtesy of FORD MOTOR CO.
    • Repeat this measurement while wiggling the harness.
    • Measure the resistance between 4X4 control module C3253-16, circuit RCF21 (WH/VT), harness side and ATC solenoid jumper harness C3051-2, circuit RCF21 (WH/VT), harness side.
      Fig 5: Checking Circuits RCF21 (WH/VT) For Open At C3051
      G06098367Courtesy of FORD MOTOR CO.
    • Repeat this measurement while wiggling the harness.
    • Are the resistances less than 5 ohms? 
    • Yes:  GO to D7.
    • No:  REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  7. D7 CHECK THE ATC SOLENOID CIRCUIT FOR AN INTERNAL OPEN 
    NOTE: The Active Torque Coupling (ATC) solenoid jumper harness must be secured to prevent damage to the wiring.
    • Disconnect: ATC Solenoid C3254.
    • Measure the resistance between ATC solenoid C3254-1, circuit CCF21 (VT/WH), component side, and ATC solenoid C3254-2, circuit RCF21 (WH/VT), component side.
      Fig 6: Checking ATC Solenoid Circuit For Internal Open
      G06064365Courtesy of FORD MOTOR CO.
    • Repeat this measurement while wiggling the harness.
    • Is the resistance less than 10 ohms? 
    • Yes:  REPAIR or INSTALL a new ATC solenoid jumper harness. CLEAR the DTCs. REPEAT the self-test.
    • No:  INSTALL a new rear axle assembly. REFER to REAR DRIVE AXLE/DIFFERENTIAL . CLEAR the DTCs. REPEAT the self-test.
  8. D8 CHECK CIRCUIT GD126 (BK/WH) FOR AN OPEN 
    • Measure the resistance between 4X4 control module C3253-15, circuit GD126 (BK/WH), harness side and ground.
      Fig 7: Measuring Resistance Between 4X4 Control Module C3253-15, Circuit GD126 (BK/WH) And Ground
      G06064366Courtesy of FORD MOTOR CO.
    • Repeat this measurement while wiggling the harness.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to D9.
    • No:  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  9. D9 CHECK THE 4X4 CONTROL MODULE POWER CIRCUITS 
    • Ignition ON.
    • Measure the voltage between 4X4 control module C3253-4, circuit CBP35 (YE/GY), harness side and ground; and between 4X4 control module C3253-5, circuit SBP11 (BU/RD), harness side and ground.
      Fig 8: Checking 4X4 Control Module Power Circuits
      G08024782Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    • Yes:  GO to D10.
    • No:  VERIFY the Smart Junction Box (SJB) fuse(s) 11 (10A) and 35 (10A) are OK. If fuse(s) are OK, REPAIR the circuit in question. If SJB fuse(s) are not OK, REFER to the OEM WIRING DIAGRAMS (EXCEPT HYBRID) to identify possible causes of the circuit short. CLEAR all Continuous Memory Diagnostic Trouble Codes (CMDTCs). REPEAT the self-test.
  10. D10 CHECK FOR CORRECT 4X4 CONTROL MODULE OPERATION 
    • Disconnect: 4X4 Control Module C3253.
    • Check the harness and component side connectors for:
      • corrosion.
      • pushed-out/bent pins.
    • Check the ATC solenoid jumper harness between the 4X4 control module and the ATC solenoid, located on the rear subframe.
    • Connect the 4X4 control module and make sure it seats correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new 4X4 control module. REFER to 4X4 CONTROL MODULE . CLEAR the DTCs. REPEAT the self-test.
    • No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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