FixVault

DTC C1248/48 Open Circuit in Rear Differential Lock: Description

The 4WD control ECU stimulates the actuator to lock the rear differential in accordance with the rear differential lock switch. The skid control ECU monitors the transfer indicator switch (rear differential lock) and if the rear differential is locked, at which time the rear differential lock indicator light is illuminated, prohibits ABS, TRAC and VSC controls. At the same time, the skid control ECU illuminates the ABS warning light, VSC OFF indicator light and SLIP indicator light.

DTC DETECTING CONDITIONS AND TROUBLE AREAS REFERENCE

DTC No. DTC Detecting Condition Trouble Areas
C1248/48 At vehicle speed of 31 mph (50 km/h) or more, 3 seconds or more elapse after rear differential changes from free to lock.
  • Rear differential lock indicator switch
  • Rear differential lock indicator switch circuit
  • Master cylinder solenoid (skid control ECU)