Suzuki 2006 SX4 Service Manual page 149

DTC Detecting Condition and Trouble Area
DTC detecting condition
If either of the following condition is fulfilled:
• Brake pedal switch signal (ON) and brake light switch
signal (ON) are detected at a time.
• Brake pedal switch signal (OFF) and brake light switch
signal (OFF) are detected at a time.
(1 driving cycle detection logic but MIL does not light up)
DTC Confirmation Procedure
WARNING
!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester.
1) With ignition switch turned OFF, connect scan tool to DLC.
2) Turn ON ignition switch and clear DTC.
3) Start engine and warm up to normal operating temperature. (ECT approx. 90 – 95 °C, 194 – 203 °F)
4) Drive vehicle at 50 km/h (80 mph) or higher for 3 min. or more.
5) Stop vehicle.
6) Depress brake pedal for 3 times.
7) Check DTC.
DTC Troubleshooting
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Brake switch check
1) Check brake switch referring to "Brake Light Switch
Inspection in Section 9B".
Is it in good condition?
3 Brake switch power circuit check
1) Disconnect connector from brake switch connector with
ignition switch turned OFF.
2) Check for proper connection to brake switch connector.
3) If connections are OK, check that circuit voltage
between "Power supply circuit of brake pedal switch" or
"Power supply circuit of brake light switch" and vehicle
body ground is battery voltage with ignition switch turned
ON.
Are they in good condition?
Action
Engine General Information and Diagnosis:
Trouble area
• Brake light switch and/or its circuit
• Brake pedal switch and/or its circuit
• ECM
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
1A-105
No
Go to "Engine and
Emission Control
System Check".
Replace brake switch.
Check related fuse and
repair defective circuit.