Suzuki Baleno Manual page 1407

DTC P0141 HEATED OXYGEN SENSOR (HO2S) HEATER CIRCUIT
MALFUNCTION (SENSOR-2)
WIRING DIAGRAM
1. Main fuse
2. Ignition switch
3. To HO2S-1 heater
4. To other sensor
5. Heater
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
Current of HO2S-2 heater is higher than specified value or lower
than specified value.
DTC CONFIRMATION PROCEDURE
WARNING:
D When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and be very careful during testing to avoid occurrence of an accident.
D Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) With ignition switch OFF, connect scan tool.
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 40 mph, 60 km/h or more.
5) Keep above vehicle speed for 5 min. (Throttle valve opening is kept constant in this step.)
6) Stop vehicle and run engine at idle speed for 1 min.
7) Check DTC and pending DTC.
ENGINE GENERAL INFORMATION AND DIAGNOSIS (J18 ENGINE WITH WU TWC) 6-2-59
TROUBLE AREA
D HO2S-2 heater
D HO2S-2 heater circuit
D ECM