Suzuki 2006 SX4 Service Manual page 208

1A-164 Engine General Information and Diagnosis:
Troubleshooting
NOTE
• Before performed troubleshooting, be sure to read the "Precautions of ECM Circuit Inspection".
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to "Inspection of ECM and Its Circuits".
Step
1 DTC check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch and check DTC.
Is there any CAN-DTC?
2 Electric load signal circuit check
1) Start engine and select "Data List" mode on scan tool.
2) Check electric load signal under following conditions
respectively.
Blower fan signal (Manual A/C model)
Blower speed selector turned 2nd position or less:
OFF
Blower speed selector turned to 3rd position or
more: ON
Blower fan signal (Automatic A/C model)
Blower speed selector OFF or 1st position: OFF
Blower speed selector turned to 3rd position or
more: ON
Radiator fan signal
Engine coolant temperature is lower than 97 °C (206
°F): OFF
Engine coolant temperature is higher than 97 °C (206
°F): ON
Electric load signal
Engine running, rear defogger switch, small light or
headlight switch OFF: OFF
Engine running, rear defogger switch, small light or
headlight switch ON: ON
Is check result satisfactory?
Action Yes
Go to "Troubleshooting
for CAN-DTC".
Electric load signal
circuit is in good
condition.
No
Go to Step 2.
Check defective signal
circuit.