Transfer Case Mode Sensor Error

Test 1 - 2:

Test 3 - 6:

Test 7 - 9:

SYMPTOM
TRANSFER CASE MODE SENSOR ERROR

WHEN MONITORED
Continuously with the ignition on.

SET CONDITION
Whenever the Transfer Case Control Module detects any of the following conditions: 1. The Mode Sensor has an incorrect transition during a shift, then attempts and fails two times and defaults to a 4WD HI position. 2. An invalid Mode Sensor Position. 3. The Mode Sensor has four failed transitions during an ignition cycle.

POSSIBLE CAUSES
- Mode sensor circuit open
- Mode sensor ground circuit open
- Mode sensor circuit short to ground
- Mode sensor circuit short to voltage
- 5 Volt mode sensor supply circuit open
- Transfer case mode sensor
- Transfer case control module
- Intermittent Wiring and connectors