Suzuki Wagon R Manual page 426

DTC P0443 PURGE CONTROL VALVE CIRCUIT MALFUNCTION
CIRCUIT DESCRIPTION
1. EVAP canister purge valve
2. To main relay
3. ECM
4. Sensed information
5. Intake manifold
6. EVAP canister
7. Tank pressure control valve
8. Fuel vapor line
9. Fuel tank
DTC DETECTING CONDITION
Canister Purge control valve circuit is opened
or shorted.
DTC CONFIRMATION PROCEDURE
1) Clear DTC with ignition switch ON.
2) Select "DTC" mode on scan tool and check DTC.
INSPECTION
STEP
1 Check EVAP canister purge valve operation
1) With ignition switch OFF, disconnect coupler
from canister purge valve.
2) Check resistance of EVAP canister purge
valve.
Resistance between
two terminals
Resistance between
terminal and body : 1M Ω or higher
Is it as specified?
Fig. 1 for Step 1
ACTION
: 30 – 34 Ω at 20_C (68_F)
POSSIBLE CAUSE
D "R /B" circuit open or short
D "B/R" wire open
D Canister purge valve malfunction
YES
"R /B" circuit open or
short, "B/R" circuit
open, poor EVAP
canister purge valve
coupler connection.
ENGINE DIAGNOSIS 6-87
NO
Replace EVAP canister
purge valve.