Page 2618 - Foton Workshop Manual - Sauvana

62-566 DIAGNOSIS-ENGINE CONTROL SYSTEM

P0444，P0458，P0459 -CANISTER CONTROL VALVE FAULT

P0444-Circuit Fault of canister control valve control
P0458-Lower voltage of canister control valve control circuit
P0459-Higher voltage of canister control valve control circuit

General

1. Vapor exhaust systems introduce gasoline vapors from fuel tanks into storage tanks
of activated carbon that absorbs gasoline vapors. The engine uses fresh air to draw
these gasoline vapors into the engine combustion chamber.
2. If the engine electronic injection control unit detects short the circuit or open circuit
in the control circuit of the canister control valve of the steam exhaust system, the
fault code will appear. Fault reasons include the short circuit of canister control
valve control power supply, open circuit or short circuit to earth of canister control
valvecontrol circuit, fault of canister control circuit itself, fault of the engineECUand
so on.

Circuit Diagram

Battery
Engine
compartment
fuse box
A40

85 30
Canister solenoid valve
Main
F5 relay F24 E04
10A 15A
R15
86 87
Br-Y
R-Y P
16 A302
C202
A301 A304 1 2
22 4 Br-Y
C201 C204
W-R G-R
C018
R-Y P 4 E101
30 69 35
C99 C99 E01
ECU power Main relay control Canister solenoid
valve control
Engine ECU
E01
C99
fuwx62022

Page 2618