Page 337 - Foton Workshop Manual - Tunland (AT)

DIAGNOSTICS - ENGINE CONTROL SYSTEM 04-191

P322，P324，P331，P332，P2442，P2443，P2444，P2445-FUEL

INJECTOR FAULT
P322-1 CYLINDER INJECTOR SOLENOID VALVE DRIVE CIRCUIT

- CURRENT IS BELOW NORMAL OR OPEN CIRCUIT

P324-3 CYLINDER INJECTOR SOLENOID VALVE DRIVE CIRCUIT 04
- CURRENT IS BELOW NORMAL OR OPEN CIRCUIT

P331-2 CYLINDER INJECTOR SOLENOID VALVE DRIVE CIRCUIT
- CURRENT IS BELOW NORMAL OR OPEN CIRCUIT

P332-4 CYLINDER INJECTOR SOLENOID VALVE DRIVE CIRCUIT
- CURRENT IS BELOW NORMAL OR OPEN CIRCUIT

Description
1 . The injector solenoid valve controls the injection volume and injection timing.
The engine control module (ECM) enables the solenoid valve to be energized
by turning off the switches in high side and low side.There are four high side
switches and four low side switches in the ECM. and 2 cylinder (front row)
injectors share a single high end switch to connect the injector circuit with the
high voltage power supply within the ECM. Also, the 3 and 4 cylinder (rear)
injectors also share a single high end switch. Each injector circuit has a dedicated
low side switch, which forms a complete circuit to the ground inside the ECM.
Circuit Diagram

Page 337