Suzuki 2006 SX4 Service Manual page 137

DTC Confirmation Procedure
WARNING
!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and very careful during testing to avoid occurrence of an accident.
• Road test should be carried out with 2 persons, a driver and a tester, on a level road.
NOTE
Check to make sure that the following conditions are satisfied when using this "DTC Confirmation
Procedure".
• Intake air temperature at engine start: –10 °C (14 °F) to 80 °C (176 °F)
• Intake air temperature: –10 °C (14 °F) to 70 °C (158 °F)
• Engine coolant temperature: 70°C (158 °F) to 150 °C (302 °F)
• Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
• The following DTCs are not detected: DTCs related to ECT sensor, IAT sensor, MAF sensor,
barometric pressure sensor and VSS
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm up to normal operating temperature.
4) Increase vehicle speed to 50 – 60 mph (80 – 100 km/h).
5) Keep above vehicle speed for 10 min. or more.
6) Stop vehicle.
7) Check whether catalyst readiness/monitoring test has completed or not by using scan tool.
If catalyst readiness/monitoring test has not completed, check vehicle conditions (environmental) and repeat Steps
4) through 6).
8) Check DTC and pending DTC.
DTC Troubleshooting
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Exhaust system visual inspection
1) Check exhaust system for leaks, damage and loose.
Is it in good condition?
3 HO2S circuit check
1) Check signal and ground circuits of HO2S for high
resistance referring to step 3 of "DTC P0137 / P0138: O2
Sensor (HO2S) Circuit Low Voltage / High Voltage
(Sensor-2, Bank-1)".
Are they in good condition?
4 1) Replace exhaust manifold (built in warm up three way
catalytic converter) and exhaust center pipe (built in
three way catalytic converter).
2) Perform DTC confirmation procedure.
Is DTC P0420 still detected?
Action
Engine General Information and Diagnosis:
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Substitute a known-
good ECM and recheck.
1A-93
No
Go to "Engine and
Emission Control
System Check".
Repair or replace.
Repair or replace.
End.