P1875

DTC P1875: "4WD LOW" Switch Circuit Malfunction





Wiring Diagram

DTC Detecting Condition and Trouble Area

DTC Detecting Condition
While driving at higher than specified vehicle speed and with more than specified throttle valve opening, the following conditions are satisfied for specified time.
^ Vehicle speed sensed by vehicle speed sensor is more than 10 km/h higher than that sensed by A/T output speed sensor (2 driving cycle detection logic)

Trouble Area
^ "4WD LOW" switch or its circuit
^ PCM

DTC Confirmation Procedure

WARNING:
^ When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
^ Road test should be carried out with 2 persons, a driver and a tester, on a level road.

1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTC, pending DTC and freeze frame data in PCM memory by using scan tool.
3) Start engine.
4) Increase vehicle speed to about 30 km/h (19 mph) or more in "D" range and is in "2H" position.
5) Keep driving at above vehicle speed for 30 seconds.
6) Stop vehicle and shift transfer lever to "4L" position with A/T selector lever is in "P" range
7) Increase vehicle speed to about 25 km/h (15 mph) or more in "D" range and is in "4L" position.
8) Keep driving at above vehicle speed for 30 seconds.
9) Stop vehicle and check pending DTC and DTC by using scan tool.

Step 1-4:

Step 4 (continued)-5:

DTC Troubleshooting