Suzuki 2006 SX4, Service Manual

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Engine General Information and Diagnosis: 1A-69
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 DTC check
Is there DTC(s) other than P0116?
Go to applicable DTC
diag.flow. Go to Step 3.
3 Engine coolant temperature check
1) With ignition switch OFF, connect scan tool to DLC.
2) With ignition switch ON, check engine coolant
temperature displayed on scan tool. (ECT 1)
3) Warm up engine to normal operating temperature.
4) Check engine coolant temperature displayed on scan
tool. (ECT 2)
Is difference between ECT 1 and ECT 2 less than 2
°
C?
Go to Step 5. Go to Step 4.
4 Thermostat check
1) Check thermostat referring to “Thermostat Inspection in
Section 1F”.
Is thermostat in good condition?
Go to Step 5. Replace thermostat.
5 ECT sensor circuit check
1) With ignition switch OFF, connect scan tool to DLC and
disconnect ECT sensor connector (1).
2) With ignition switch ON, check engine coolant
temperature displayed on scan tool.
ECT sensor temperature specifications
Signal wire terminal (2) and ground wire terminal (3)
in ECT sensor connector are shorted by service wire
(4): 130
°
C (266
°
F)
Signal wire terminal (2) and ground wire terminal (3)
in ECT sensor connector are opened: –40
°
C (–40
°
F)
Is check result as specified?
Go to Step 6. Check ECT sensor
signal and ground
circuits referring to Step
2 of “DTC P0117 /
P0118: Engine Coolant
Temperature Circuit
Low / High”.
6 ECT sensor performance check
1) Check ECT sensor referring to “Engine Coolant
Temperature (ECT) Sensor Inspection in Section 1C”.
Is check result as specified?
Substitute a known-
good ECM and recheck. Replace ECT sensor.
I6JB01110032-01