Fault Codes:
Caterpillar 328D 39:1598-5
Fault Description:
The current of the retraction pressure solenoid valve of the accessory valve 3 is lower than the normal value
Fault Cause:
The solenoid valve actuator circuit of the modulation valve is open circuit. The circuit of the modulation valve is open circuit. If the modulation valve malfunctions and the ECM malfunctions, it is unlikely
