Pinpoint Test Q: DTC P1899:00
Four Wheel Drive (4WD) Systems - Electronic Shift
Pinpoint Test Q: DTC P1899:00
Refer to Wiring Diagram Set 34, Four-Wheel Drive Systems for schematic and connector information. Diagrams By Number
Normal Operation
The vehicle must be engaged into either 4 wheel high or 4 wheel low mode in order to operate the rear Electronic Locking Differential (ELD). When the Mode Select Switch (MSS) is engaged to lock the rear differential, a signal is sent to the ELD field coil by the Transfer Case Control Module (TCCM) through circuit CCF31. This signal is a duty cycle signal which is initially high to lock the differential and decreases once the differential is locked. When the differential is starting to lock, the lamp will start to blink. When the differential is fully locked, the lamp will illuminate steady.
- DTC P1899:00 Axle Disconnect Indicator Circuit Low: No Sub Type Information - When not in locking mode, the TCCM senses the indicator lamp circuit has low voltage and is always illuminated.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- TCCM
PINPOINT TEST Q: DTC P1899:00
NOTE: Make sure the battery is fully charged before performing this pinpoint test.
