Suzuki 2006 SX4, Service Manual

Page: 139 / 1478

Engine General Information and Diagnosis: 1A-95
DTC Troubleshooting
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 EVAP canister purge valve power supply voltage check
1) Disconnect connector from EVAP canister purge valve
with ignition switch turned OFF.
2) Check for proper terminal connection to EVAP canister
purge valve and ECM connectors.
3) If connections are OK, check that EVAP canister purge
valve power supply voltage is battery voltage between
EVAP canister purge valve connector and vehicle body
ground with ignition switch turned ON.
Is it in good condition?
Go to Step 3. Repair or replace EVAP
canister purge valve
power supply circuit.
3 Wire harness check
1) Disconnect connector from ECM with ignition switch
turned OFF.
2) Check that EVAP canister purge valve circuit is as
follows.
• Wiring harness resistance of EVAP canister purge
valve control circuit is less than 3
Ω
.
• Insulation resistance of EVAP canister purge valve
control circuit is infinity between EVAP canister purge
valve connector and vehicle body ground.
• Circuit voltage of EVAP canister purge valve control
circuit is 0 – 1 V with ignition switch turned ON.
Are they in good condition?
Go to Step 4. Repair or replace
defective wire harness.
4 EVAP canister purge valve check
1) Check EVAP canister purge valve coil resistance
referring to “EVAP Canister Purge Valve Inspection in
Section 1B”.
Is it in good condition?
Substitute a known-
good ECM and recheck. Replace EVAP canister
purge valve.