Heated Oxygen Sensor (Ho2S) Heater Circuit Malfunction (Sensor-2) - Suzuki Swift User Manual

6-62 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
DTC P0141 HEATED OXYGEN SENSOR (HO2S) HEATER CIRCUIT
MALFUNCTION (SENSOR-2)
CIRCUIT DESCRIPTION
Main
fuse
"IG COIL METER"
DTC DETECTING CONDITION
DTC will set when A or B condition it met.
A. Low voltage at terminal C02-19 for specified time after engine
start or while engine running at high load.
B. High voltage at terminal C02-19 while engine running under
other than above condition.
: 2 driving cycle detection logic, continuous monitoring.
DTC CONFIRMATION PROCEDURE
1) Turn ignition switch OFF once and then ON.
2) Clear DTC, start engine and warm up engine to normal operating temperature.
3) Keep it at 2000 r/min for 2 min.
4) Check pending DTC in "ON BOARD TEST" or "PENDING DTC" mode and DTC in "DTC" mode.
Ignition
switch
To ignition coil
To other sensor To other sensor
Heater
POSSIBLE CAUSE
D HO2S-2 heater circuit open or shorted
to ground
D ECM (PCM) malfunction