Dtc P0443 Evaporative Emission (Evap) Purge Control Circuit Fault - Daewoo CIELO EURO III Manual

Conditions for Clearing the MIL/DTC
D The MIL will turn off after three (four –
1.5L SOHC) consecutive ignition cycles in which the
diagnostic runs without a fault.
D A history DTC will clear after 40 consecutive warm-up
cycles without a fault.
D DTC(s) can be cleared by disconnecting the battery.
D Using a scan tool.
Diagnostic Aids
Using Freeze Frame and/or Failure Records data may
aid in locating an intermittent condition. If the DTC can-
not be duplicated, the information included in the Freeze
Frame and/or Failure Records data can be useful in de-
termining how many miles since the DTC set. The Fail
Counter and the Pass Counter can also be used to de-
termine how many ignition cycles the diagnostic re-
ported a pass and/or a fail. Operate the vehicle within
the same freeze frame conditions (rpm, load, vehicle
speed, temperature, etc.) that were noted. This will iso-
late when the DTC failed.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Table.

DTC P0443 Evaporative Emission (EVAP) Purge Control Circuit Fault

Step
Perform an On-Board Diagnostic (EOBD) System
Check.
1
Is the system check complete?
1. Turn the ignition ON engine OFF.
2. Install the scan tool.
3. Command the Evaporative Emission (EVAP)
2
Purge Solenoid ON and OFF.
Does the solenoid turn ON and OFF with each com-
mand?
1. Turn the ignition OFF.
2. Disconnect the
engine control module (ECM) connector
containing the solenoid control circuit (red
connector, engine connector – 1.5L
SOHC).
3. Turn the ignition ON.
3
4. Using a Digital Voltmeter (DVM) on a 10 amp
scale, measure the current from the solenoid
control circuit, at terminal M4 in the
ECM harness connector to ground for
2 minutes.
Does the current draw measure less than the speci-
fied value?
DAEWOO T-154 BL2,3
Action
ENGINE CONTROLS 1F – 325
1. The On-Board Diagnostic (EOBD) System Check
prompts the technician to complete some basic
checks and store the freeze frame and failure re-
cords data on the scan tool if applicable. This
creates an electronic copy of the data taken when
the malfunction occurred. The information is then
stored on the scan tool for later reference.
2. Listen for an audible click when the solenoid oper-
ates. Be sure that both the ON and the OFF states
are commanded. Repeat the commands as neces-
sary.
3. This check can detect a partially shorted coil which
would cause excessive current flow. Leaving the cir-
cuit energized for 2 minutes allows the coil to warm
up. When warm, the coil may open (amps drop to 0),
or short (amps go above 0.75).
13. If no trouble is found in the control circuit the con-
nection at the ECM, the ECM may be
faulty, but this is an extremely unlikely failure. The
replacement ECM must be reprogrammed.
Refer to the latest Techline procedure for ECM
reprogramming.
Value
–
Go to Step 2
–
Go to Step 3
Go to "Diagnos-
0.75 amps
Yes No
Go to "On-
Board Diag-
nostic System
Check"
Go to Step 5
tic Aids" Go to Step 4