Toyota ZZT230 series Repair Manual page 267

DTC
P0135
DTC
P0141
CIRCUIT DESCRIPTION
Refer
to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control) on page Dl-44
DTCNo.
the
detection
When heater operales,
{21rip
1'()135
P0141
Heater current of 0.2
•
{2trlpcleteclion lOgic)
•
HINT:
•
Bank 1 refers to the bank that includes cylinder No.1.
Sensor 1 refers to the sensor closer to the engine body.
Sensor 2 refers to the sensor farther away from the engine body.
WIRING DIAGRAM
Refer to DTC P0125 on page 01-44 for the WIRING DIAGRAM.
INSPECTION PROCEDURE
HINT:
Read freeze frame
data using TOYOTA hand-held tester orOBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining
whether
the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich, etc.
at the time of the maJfunction.
Heated Oxygen Sensor Heater Circuit
Malfunction (Bank1 Sensor1 )
Heated Oxygen Sensor Heated Circuit
Malfunction (Bank1 Sensor2)
DTC
Detecll ng Conclltlon
lOgiC)
healer current
exceeds 2 A
less when
the heater operates
A or
Trouble Area
•Open or short in heater circuit of
• Heated oxygen
sensor heater
•ECM
"'''""" '
heated oxygen sensor