Dtc P0444, P0458, P0459 - Changan CS35 Workshop Manual

3.1.13-198

DTC P0444, P0458, P0459

1. DTC Description
Fault Code
P0444
P0458
P0459
2. Possible Sources
Fault
Test Tactics
Code
P0444
Hardware or circuit
P0458
inspect
P0459
3. Diagnosis Procedures
Test Conditions
1. Use the diagnostic tool to carry out carbon canister solenoid valve active test
CS35 2013.04
Electronic Control System - ME7
Description
Carbon canister control valve
control circuit open circuit
Carbon canister control valve
control circuit voltage too low
Carbon canister control valve
control circuit voltage too high
Setting Conditions (Control
Short circuit to ground
Short circuit to power supply
Operating voltage of carbon canister control valve is
controlled by the main relay controlled by the ECM,
and battery voltage is transmitted to terminal 2 of
carbon canister control valve wiring harness con-
nector E21 through terminal 45 of engine compart-
ment electric center wiring harness connector C01
fuse EF23.
Control circuit: ECM controls the grounding of termi-
nal 1 of E21 through terminal 46 of ECM wiring har-
ness connector E01.
Strategy)
Open circuit
Details/Results/Actions
A. Connect the diagnostic tool to "fault diagnosis
interface".
B. Disconnect the vacuum pipe from carbon canister
solenoid valve to active carbon canister.
C. Start the engine, open the diagnostic tool.
D. Enter the menu: "Changan Auto"/"CS35"/"UAES
ME788"/"Motion Test"/"Canister Control Valve".
E. Use the the diagnostic tool to open "carbon canister
control valve", cover the solenoid vacuum interface
with your fingers.
Is there vacuum suction?
Y
Intermittent fault.
Refer to: Intermittent Fault Diagnosis
(3.1.13 Electrical Control System - ME7,
Symptom Diagnosis and Testing).
N
Go to step 2.
3.1.13-198
Definition
Fault
• Solenoid valve
• Solenoid circuit
• ECM