Normal Operation
WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
When the MSS is engaged to lock the rear differential, a PWM signal is sent to the ELD field coil by the TCCM through the differential lock control circuit. This PWM signal is initially 98% duty cycle to lock the differential and decreases to 40% duty cycle once the differential is locked. When the differential is fully locked, the indicator will illuminate steady.
- DTC P185C:00 (Differential Lock-Up Indicator Circuit High: No Sub Type Information) - When the driver engages the ELD the TCCM C2371A-20 senses the indicator circuit has high voltage and is not illuminated.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- TCCM