Toyota DTC P0135 User Manual download pdf

DI–56

–DIAGNOSTICS ENGINE

2000 CELICA (RM744U)

DTC P0135 Heated Oxygen Sensor Heater Circuit

Malfunction (Bank1 Sensor1)

DTC P0141 Heated Oxygen Sensor Heated Circuit

Malfunction (Bank1 Sensor2)

CIRCUIT DESCRIPTION

Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control) on page DI–44.

DTC No. DTC Detecting Condition Trouble Area

P0135

When the heater operates, heater current exceeds 2 A

(2 trip detection logic)

S Open or short in heater circuit of heated oxygen sensor

Htd ht

P0135

P0141

Heater current of 0.2 A or less when the heater operates

(2 trip detection logic)

S Heated oxygen sensor heater

S ECM

HINT:

S Bank 1 refers to the bank that includes cylinder No.1.

S Sensor 1 refers to the sensor closer to the engine body.

S Sensor 2 refers to the sensor farther away from the engine body.

WIRING DIAGRAM

Refer to DTC P0125 on page DI–44 for the WIRING DIAGRAM.

INSPECTION PROCEDURE

HINT:

Read freeze frame data using TOYOTA hand–held tester or OBD 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 malfunction.

DI1ED–07

1 2

DI–56–DIAGNOSTICS ENGINE2000 CELICA (RM744U)DTC P0135 Heated Oxygen Sensor Heater CircuitMalfunction (Bank1 Sensor1)DTC P0141 Heated Oxygen Sensor H

A09084A09092ONHT1AHT1B–DIAGNOSTICS ENGINEDI–572000 CELICA (RM744U)1 Check voltage between terminals HT1, HT2 of ECM connectors and bodyground.PREPAR

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Toyota DTC P0135 User Manual