LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 910 (Transfer Case) >> DTC/Circuit Diagnosis >> DTC P1823: 2-4 Solenoid >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK 4WD SHIFT SWITCH SYSTEM 

    Perform self-diagnosis. Refer to "CONSULT FUNCTION (ALL MODE AWD/4WD) ".

    Is the 4WD MOD SW [P1814] (with CONSULT) or Flickering pattern: 16 (without CONSULT) detected? 

    YES: Perform trouble diagnosis for 4WD shift switch. Refer to "DIAGNOSIS PROCEDURE ".

    NO: GO TO 2.

  2. CHECK 2-4WD SHIFT SOLENOID SIGNAL 

    With CONSULT 

    1. Start engine.
    2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT.
    3. Read out the value of 2-4WD SOL and 2-4WD SOL MON.
      Monitored item Condition Display value
      2-4WD SOL
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 2WD OFF
      4WD shift switch: AUTO ON
      4WD shift switch: 4H
      4WD shift switch: 4LO
      4WD shift switch: AUTO (Wait function is operating.) OFF
      4WD shift switch: 4H (Wait function is operating.) OFF
      2-4WD SOL MON
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 2WD OFF
      4WD shift switch: AUTO ON
      4WD shift switch: 4H
      4WD shift switch: 4LO
      4WD shift switch: AUTO (Wait function is operating.) OFF
      4WD shift switch: 4H (Wait function is operating.) OFF

    Without CONSULT 

    1. Start engine.
    2. Check voltage between transfer control unit harness connector terminal and ground.
      Connector Terminal Condition Voltage (Approx.)
      E142 1 - Ground
      • Vehicle stopped
      • Engine running
      • A/T selector lever N position
      • Brake pedal depressed
      		 4WD shift switch: 2WD 0V
      4WD shift switch: AUTO, 4H or 4LO Battery voltage
      Fig 1: Checking Voltage Between Transfer Control Unit Harness Connector Terminal And Ground
      G04901527Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO  7.

      NO: GO TO 3.

  3. CHECK 4WD SHIFT SWITCH SIGNAL 
    1. Turn ignition switch ON. (Do not start engine.)
    2. Check voltage between transfer control unit harness connector terminals and ground.
      Connector Terminal Condition Voltage (Approx.)
      M141 4 - ground 4WD shift switch: AUTO, 4H or 4LO Battery voltage
      4WD shift switch: 2WD 0V
      Fig 2: Checking Voltage Between Transfer Control Unit Harness Connector Terminals And Ground
      G04901528Courtesy of NISSAN NORTH AMERICA, INC.

      Are the inspection results normal? 

      YES: GO TO 4.

      NO: Check 4WD shift switch. Refer to "COMPONENT INSPECTION ".

  4. CHECK HARNESS BETWEEN 4WD SHIFT SWITCH AND TRANSFER TERMINAL CORD ASSEMBLY 
    1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
    2. Disconnect 4WD shift switch harness connector and transfer terminal cord assembly harness connector.
    3. Check continuity between 4WD shift switch harness connector M141 terminal 4 and transfer terminal cord assembly harness connector F56 terminal 5.

      Continuity should exist. 

      Also check harness for short to ground and short to power.

      Are the inspection results normal? 

      YES: GO TO 5.

      NO: Repair or replace damaged parts.

      Fig 3: Checking Continuity Between 4Wd Shift Switch Harness Connector M141 Terminal 4 And Transfer Terminal Cord Assembly Harness Connector F56 Terminal 5
      G04901529Courtesy of NISSAN NORTH AMERICA, INC.
  5. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER TERMINAL CORD ASSEMBLY 
    1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
    2. Disconnect transfer control unit harness connector and transfer terminal cord assembly harness connector.
    3. Check continuity between transfer control unit harness connector E142 terminal 1 and transfer terminal cord assembly harness connector F56 terminal 4.

      Continuity should exist. 

      Also check harness for short to ground and short to power.

      Are the inspection results normal? 

      YES: GO TO 6.

      NO: Repair or replace damaged parts.

      Fig 4: Checking Continuity Between Transfer Control Unit Harness Connector E142 Terminal 1 And Transfer Terminal Cord Assembly Harness Connector F56 Terminal 4
      G04901530Courtesy of NISSAN NORTH AMERICA, INC.
  6. CHECK 2-4WD SOLENOID 
    1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
    2. Disconnect transfer terminal cord assembly harness connector.
    3. Check resistance between transfer terminal cord assembly terminals 4 and 5.

      4 - 5: Approx. 22.8 - 25.2 Ω 

      Are the inspection results normal? 

      YES: GO TO 7.

      NO: Replace 2-4WD solenoid. Refer to "COMPONENT PARTS LOCATION ".

      Fig 5: Checking Resistance Between Transfer Terminal Cord Assembly Terminals 4 And 5
      G04901531Courtesy of NISSAN NORTH AMERICA, INC.
  7. CHECK TRANSFER CONTROL UNIT 

    Check transfer control unit input/output signal. Refer to "REFERENCE VALUE ".

    Are the inspection results normal? 

    YES: GO TO 8.

    NO: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.

  8. CHECK DTC 

    Perform the self-diagnosis, after driving a vehicle for a while.

    Are the inspection results normal? 

    YES: Inspection End.

    NO: Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".

scientia non olet · About LEMON Manuals