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Tahoe / Yukon Service Manual

DTC C116E

Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC C116E Transfer Case Range Actuator Lock System Performance Symptom Byte Information: Symptom Byte List Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performanc
12 V Reference — Terminal B @ A16 Transfer Case Four Wheel Drive Actuator C1162 11 C1162 13 C1162 12 —
Control — Terminal C @ A16 Transfer Case Four Wheel Drive Actuator C1162 11 C1162 13 C1162 12 C116E 67

Circuit/System Description For an overview of the component/system, refer to: Transfer Case Description and Operation

Circuit Description
12 V Reference — Terminal B @ A16 Transfer Case Four Wheel Drive Actuator Regulated voltage supplied by the control module.
Control — Terminal C @ A16 Transfer Case Four Wheel Drive Actuator The output circuit is switched to ground to activate the component.
Component Description
A16 Transfer Case Four Wheel Drive Actuator The motor is bidirectional.
K69 Transfer Case Control Module The control module contains a microprocessor used to process input data to control outputs.

di i f i h Conditions for Running the DTC Ignition = On System Voltage = 9 to 17.5 V Frequency the DTC runs = Continuously — After the running conditions are met Conditions for Setting the DTC C116E 67 Lock Unsuccessful The above condition(s) must occur 10 times. Actions Taken When the DTC Sets Shifting = Disabled Driver Information Display = Service 4WD Conditions for Clearing the DTC The conditions for setting the DTC no longer exist. A history DTC will clear after 40 consecutive malfunction-free ignition cycles. Reference Information Schematic Reference Transfer Case Control Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References Circuit/System Verification

  1. Ignition » On / Vehicle » In Service Mode
  2. Verify DTC C1162 is not set. ⇒ If the DTC is set Refer to: DTC C1162 ⇓ If the DTC is not set
  3. Verify DTC C116E is not set. ⇒ If the DTC is set Refer to: Circuit/System Testing ⇓ If the DTC is not set
  4. Operate the vehicle within the Conditions for Running the DTC. Verify the DTC does not set. ⇒ If the DTC sets Refer to: Circuit/System Testing ⇓ If the DTC is not set
  5. All OK. Circuit/System Testing
  6. Ignition » On / Vehicle » In Service Mode
  7. S126 Ride Control Switch» 4WD/AWD Automatic or S126 Ride Control Switch» Transfer Case in Neutral
  8. Transmission in Drive
  1. Perform the scan tool control function: Range Actuator Lock » Locked /Unlocked Verify the scan tool parameter: Range Actuator Brake Control Circuit High Side Voltage = 4.5 to 7.3 V — Range Actuator Lock » Locked Range Actuator Brake Control Circuit Low Side Voltage = 4.5 to 7.3 V — Range Actuator Lock » Locked Range Actuator Brake Control Circuit High Side Voltage = 6 to 16 V — Range Actuator Lock » Unlocked Range Actuator Brake Control Circuit Low Side Voltage = 0 to 0.5 V — Range Actuator Lock » Unlocked ⇒ If not the specified value Refer to: DTC C1162 ⇓ If the specified value
  2. Test or replace the component: A16 Transfer Case Four Wheel Drive Actuator Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification Transfer Case Two/Four Wheel Drive Actuator Replacement — A16 Transfer Case Four Wheel Drive Actuator For control module replacement, programming, and setup refer to: Control Module References