Maintenance Manual for Chery·Windcloud Marelli EFI System
11). Excessive idle speed (ECU shall have self-learning again after power cutoff)
Yes Eliminate failure
displayed
1 Set ignition switch in “ON”. Check with scanner
to see if there is failure information record.
No Go to next step
Yes Adjust or replace 2 Check if cable connecting with accelerator pedal
is stuck or over-tightened or idle adjusting screw
shifts.
No Go to next step
Yes Repair or replace 3 Check if carbon canister control valve, fuel
pressure regulator, positive crankcase ventilation
vacuum tube, brake system vacuum booster tube
are safely installed or damaged.
No Go to next step
Yes Go to next step 4 Make engine run at idle speed, and place it in
neutral position, step down on the brake pedal to
see if idling speed is too high.
No Go to step 6
Yes Repair or replace
vacuum booster
5 Clamp vacuum booster tube to see if idling speed
turns normal.
No Go to next step
Yes Replace PVC valve6 Clamp positive crankcase ventilation vacuum tube
to see if idle speed turns to normal.
No Go to next step
Yes Replace carbon
canister control
valve
7 Clamp tube of carbon canister control valve to see
if idling speed turns to normal.
No Go to next step
Yes Repair or replace 8 Check to see if idling speed actuator is dumb or
stuck.
No Go to next step
Yes Repair or replace 9 Check somewhere else of air intake pipe to see if
leakage occurs.
No Go to next step
Yes Go to next step 10 Check if injector seal ring is in good condition.
No Replace seal ring
Yes Replace ECU 11 Check if intake manifold absolute pressure and
intake air temperature sensor is in good condition.
No Replace sensor
51
To Next Page
