drivers OFF. Volt meters will not work for this test.
6. Using the L-BU probe J 35616-64B, connect a test light between the TCSCS harness as specified below for the LED control circuit being
tested.
7. Key ON, engine OFF.
8. Using the Special Function ability of the scan tool, command the affected LED ON and OFF. The test light should turn ON and OFF as
commanded.
锟斤拷 If the test light remains illuminated when commanded OFF, test the affected control circuit for a short to ground. If all circuits and
connections test normal, replace the TCCM.
锟斤拷 If the test light remains OFF when commanded ON, test the affected control circuit for an open/high resistance or short to voltage. If all
circuits and connections test normal, replace the TCCM.
TCSCS
1. Using the L-BU probe J 35616-65B, connect the memory saver EL-49741 - harness to the TCSCS as specified below for the LED being
tested. Connecting the harness to the opposite pins will not illuminate the LED.
2. Connect a 9 V battery to the memory saver EL-49741 - harness.
3. Verify that only the indicator being tested illuminates.
锟斤拷 If the indicator does not illuminate when tested or the incorrect indicator illuminates, replace the TCSCS.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Transfer Case Shift Control Switch Replacement (Without SLT) (See: Powertrain Management/Transmission Control Systems/Sensors and
Switches - Transmission and Drivetrain/Sensors and Switches - Transfer Case/Four Wheel Drive Selector Switch/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for TCSCM replacement, setup, and programming
* Transfer Case High/Low Clutch Reset (See: Transmission and Drivetrain/Transfer Case/Testing and Inspection/Symptom Related Diagnostic
Procedures/MP 3023/3024-NQH - Transfer Case/Transfer Case High/Low Clutch Reset)
MP 3023/3024-NQH - Transfer Case
DTC B0785
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B0785 01
- 2WD HI Indicator Circuit Short to Battery
DTC B0785 06
- 2WD HI Indicator Circuit Short to Ground or Open
Diagnostic Fault Information
