Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.

Ignition/Vehicle - Off
Disconnect the electrical connector: A16 Transfer Case Four Wheel Drive Actuator
Connect a test lamp between the test points: Control circuit terminal A & Control circuit terminal D
Ignition - On/Vehicle - In Service Mode
Perform the scan tool control function: Range Actuator
Verify the test lamp state:

Range Actuator - Idle = Test lamp Off

Range Actuator - Clockwise = Test lamp On

Range Actuator - Counterclockwise = Test lamp On
- If not the specified state
1. Ignition/Vehicle - Off & Remove - Test lamp
2. Disconnect the electrical connector: X1 @ K69 Transfer Case Control Module
3. Ignition - On/Vehicle - In Service Mode
4. Test for less than 1 V between the test points:
  - Control circuit terminal A @ Component harness & Ground
  - Control circuit terminal D @ Component harness & Ground
  - If 1 V or greater - Repair the short to voltage on the circuit.
  - Go to next step: If less than 1 V
5. Ignition/Vehicle - Off
6. Test for infinite resistance between the test points:
  - Control circuit terminal A @ Component harness & Ground
  - Control circuit terminal D @ Component harness & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - Go to next step: If infinite resistance
7. Test for less than 2 ohms between the test points:
  - Control circuit terminal A @ Component harness & Terminal 38 @ Control module harness
  - Control circuit terminal D @ Component harness & Terminal 13 @ Control module harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component: K69 Transfer Case Control Module
- Go to next step: If the specified state
Test or replace the component: A16 Transfer Case Four Wheel Drive Actuator