Difflock PWM 1 SCB or Open Load.
- Check wiring (to V10, PWM Output 1) - Check connectors (to V10, PWM Output 1) - Check differential lock rear axle's valve • Measure the resistance between the inputs to V10, it should be around 60 Ohms. - Measure the applied valve voltage between signal to V10 and ground, it should be 24 V.
What you'll see
No driver-visible symptom recorded.
System reaction
This DTC covers two different fault cases that cannot be electrically separated. If the cause is open load in either on or off state, the valve is not connected or broken and thus the lock cannot be activated. If the cause is instead short circuit to battery, the diff lock on the rear axles will be activated, if connected, when the signal is low.
Diagnostic depth
The valve (Component V10) controlling behavior of the differential lock for the rear axles, connected on PWM Output 1 (signal A3, ground A1), is either not connected or short circuited to battery.
- Defect wiring • Short circuit to battery • Wires not connected - Defect connectors - Defect valve for differential lock rear axles