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Four Wheel Drive (4WD) Systems: Specifications Ford Edge I

Transfer Case 7 illustrations ~1566 words

TORQUE SPECIFICATIONS

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4X4 control module nut7

TORQUE SPECIFICATIONS

The All-Wheel Drive (AWD) system consists of the following

  1. Power Transfer Unit (PTU)
  2. Rear driveshaft
  3. 4X4 control module (coupling device control module) (located behind the RH side instrument panel)
  4. Rear axle with coupling device

Torque from the engine is transferred through the transaxle to the PTU. This torque is transferred from the driveshaft to the rear axle, which drives the rear halfshafts. The AWD system, referred to as an Active Torque Coupling (ATC) system, is always active and requires no driver input.

The AWD system continuously monitors vehicle conditions and automatically adjusts the torque distribution between the front and rear wheels. During normal operation, most of the torque is delivered to the front wheels. If wheel slip between the front and rear wheels is detected, or if the vehicle is under heavy acceleration, the AWD system increases torque to the rear wheels to prevent or control wheel slip.

Serviceable components of the PTU are limited to the output shaft seal and flange, intermediate shaft seal and deflector, and the PTU-transaxle compression seal. No internal components are serviced. There should be no need to remove the PTU cover. If any of the internal geared components, bearings, case cover or shafts are worn or damaged, a new PTU must be installed.

SPECIAL TOOLS Illustration Tool Name Tool Number 73III Automotive Meter 105-R0057 or equivalent Flex Probe Kit 105-R025C Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool

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Scheme 10: Four Wheel Drive (4WD) Systems - All Wheel Drive (AWD)
Scheme 10: Four Wheel Drive (4WD) Systems - All Wheel Drive (AWD)

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Scheme 11

Pinpoint Test E: Vehicle Has No or Inadequate Torque at Rear Wheels

Refer to appropriate SYSTEM WIRING DIAGRAMS article for All Wheel Drive (AWD) schematic and connector information.

Normal Operation

The on-demand four wheel drive (4WD) system uses data from other systems as inputs to the 4X4 control module. The 4X4 control module uses the inputs to determine the appropriate duty cycle to send to the active torque control coupling (ATCC) solenoid (part of rear axle) that delivers the desired torque to the rear wheels. If the 4X4 control module loses communication with, or receives invalid data from any of the necessary modules, DTCs are set and the 4X4 control module may not allow 4WD operation.

  1. DTC P1824 4-Wheel Drive Clutch Relay Circuit Failure - When the 4X4 control module detects a short to ground on the ATCC solenoid feedback circuit, this DTC is set.
  2. DTC P1825 4-Wheel Drive Clutch Relay Open Circuit - When the 4X4 control module detects an open or short to ground on the ATCC solenoid command or feedback circuit for more than 2 seconds, this DTC is set.

This pinpoint test is intended to diagnose the following

  1. Tire/axle out of range
  2. ATCC solenoid (part of rear axle)
  3. 4X4 control module
  4. Power transfer unit (PTU)
  5. Wiring, terminals or connectors

PINPOINT TEST E: VEHICLE HAS NO OR INADEQUATE TORQUE AT REAR WHEELS

Note. Carry out Inspection and Verification as outlined before carrying out this pinpoint test.

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  1. E1 CHECK FOR 4X4 CONTROL MODULE DTCs Key in ON position. Carry out the 4X4 control module self-test. Are any DTCs received? YES : For DTC P1824 or P1825, go to E5 . For all other DTCs, REFER to the 4X4 Control Module DTC Chart in this service information. NO : Go to E2 .
  2. E2 CHECK HIGH-SPEED CONTROLLER AREA NETWORK (HS-CAN) CIRCUITS BETWEEN DATA LINK CONNECTOR (DLC) AND 4X4 CONTROL MODULE FOR AN OPEN Key in OFF position. Disconnect: 4X4 Control Module C281 Measure the resistance between 4X4 control module C281-4, circuit VDB04 (WH/BU), harness side and DLC C251-6, circuit VDB04 (WH/BU), harness side; and between 4X4 control module C281-12, circuit VDB05 (WH), harness side and DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to E3 . NO : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the Network Test.
  3. E3 CHECK HS-CAN CIRCUITS FOR A SHORT TO GROUND Measure the resistance between 4X4 control module C281-4, circuit VDB04 (WH/BU), harness side and ground; and between 4X4 control module C281-12, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 5,000 ohms? YES : Go to E4 . NO : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the Network Test.
  4. E4 CHECK RESISTANCE BETWEEN HS-CAN CIRCUITS NOTE: The PCM and the instrument cluster (IC) must be connected and operating correctly to obtain the correct resistance between the HS-CAN circuits. Measure the resistance between 4X4 control module C281-4, circuit VDB04 (WH/BU) harness side and 4X4 control module C281-12, circuit VDB05 (WH) harness side. Is the resistance 60 ohms (± 5 ohms)? YES : Go to E5 . NO : REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test. CARRY OUT the Network Test.
  5. E5 CHECK CIRCUITS CCF21 (VT/WH) AND RCF21 (WH/VT) FOR A SHORT TO GROUND WITH ATCC SOLENOID (PART OF REAR AXLE) CONNECTED Key in OFF position. Disconnect: 4X4 Control Module C281 Measure the resistance between 4X4 control module C281-8, circuit CCF21 (VT/WH), harness side and ground; and between 4X4 control module C281-16, circuit RCF21 (WH/VT), harness side and ground. Are the resistances greater than 10,000 ohms? YES : Go to E8 . NO : Go to E6 .
  6. E6 CHECK CIRCUITS CCF21 (VT/WH) AND RCF21 (WH/VT) FOR A SHORT TO GROUND WITH C4004 DISCONNECTED Disconnect: ATCC Solenoid Jumper Harness C4004 Measure the resistance between 4X4 control module C281-8, circuit CCF21 (VT/WH), harness side and ground; and between 4X4 control module C281-16, circuit RCF21 (WH/VT), harness side and ground. Are the resistances greater than 10,000 ohms? YES : Go to E7 . NO : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  7. E7 CHECKING THE ATCC SOLENOID JUMPER HARNESS WIRES NOTE: The active torque control coupling (ATCC) solenoid jumper harness must be secured to prevent damage to the wiring. Disconnect: ATCC Solenoid C4347 Inspect the ATCC solenoid jumper harness for damage. Is the ATCC solenoid jumper harness damaged? YES : REPAIR or INSTALL a new ATCC solenoid jumper harness. CLEAR the DTCs. REPEAT the self-test. NO : INSTALL a new rear axle assembly. REFER to «REAR DRIVE AXLE/DIFFERENTIAL»(ref-292562) article. CLEAR the DTCs. REPEAT the self-test.
  8. E8 CHECK CIRCUITS CCF21 (VT/WH) AND RCF21 (WH/VT) FOR AN OPEN WITH ATCC SOLENOID CONNECTED Connect: ATCC Solenoid C4347 and ATCC Solenoid Jumper Harness C4004 Measure the resistance between 4X4 control module C281-8, circuit CCF21 (VT/WH), harness side and 4X4 control module C281-16, circuit RCF21 (WH/VT), harness side. Is the resistance less than 10 ohms? YES : Go to E11 . NO : Go to E9 .
  9. E9 CHECK CIRCUITS CCF21 (VT/WH) AND RCF21 (WH/VT) FOR AN OPEN AT C4004 Disconnect: ATCC Solenoid Jumper Harness C4004 Measure the resistance between 4X4 control module C281-8, circuit CCF21 (VT/WH), harness side and ATCC solenoid jumper harness C4004-1, circuit CCF21 (VT/WH). Repeat this measurement while wiggling the harness. Measure the resistance between 4X4 control module C281-16, circuit RCF21 (WH/VT), harness side and ATCC solenoid jumper harness C4004-2, circuit RCF21 (WH/VT), harness side. Repeat this measurement while wiggling the harness. Are the resistances less than 5 ohms? YES : Go to E10 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  10. E10 CHECK THE ATCC SOLENOID CIRCUIT FOR AN INTERNAL OPEN NOTE: The active torque control coupling (ATCC) solenoid jumper harness must be secured to prevent damage to the wiring. Disconnect: ATCC Solenoid C4347 Measure the resistance between ATCC solenoid C4347-1, circuit CCF21 (VT/WH), component side and ATCC solenoid C4347-2, circuit RCF21 (WH/VT), component side. Repeat this measurement while wiggling the harness. Is the resistance less than 10 ohms? YES : REPAIR or INSTALL a new ATCC solenoid jumper harness. CLEAR the DTCs. REPEAT the self-test. NO : INSTALL a new rear axle assembly. REFER to «REAR DRIVE AXLE/DIFFERENTIAL»(ref-292562) article. CLEAR the DTCs. REPEAT the self-test.
  11. E11 CHECK CIRCUIT GD140 (BK/GN) FOR AN OPEN Measure the resistance between 4X4 control module C281-15, circuit GD140 (BK/GN), harness side and ground. Repeat this measurement while wiggling the harness. Is the resistance less than 5 ohms? YES : Go to E12 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  12. E12 CHECK THE 4X4 CONTROL MODULE POWER CIRCUITS Key in ON position. Measure the voltage between 4X4 control module C281-6, circuit SBP11 (BU/RD), harness side and ground; and between 4X4 control module C281-5, circuit CBP35 (YE/GY), harness side and ground. Are the voltages greater than 10 volts? YES : Go to E13 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  13. E13 CHECK FOR CORRECT 4X4 CONTROL MODULE OPERATION Disconnect: 4X4 Control Module C281 Check the harness and component side connectors for: corrosion. pushed-out/bent pins. Check the ATCC solenoid jumper harness between the 4X4 control module and the ATCC 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»(ref-292578-S14550761782008080400000) . 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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