Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm di eg cip0136
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DI-57
DIAGNOSTICS - ENGINE
DI6V6-04
DTC P0136 Oxygen Sensor Circuit Malfunction
(Bank 1 Sensor 2)
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control) on page DI-43 .
DTC No. DTC Detecting Condition Trouble Area
Voltage output of the heated oxygen sensor remains at 0.40 V
or more, or 0.50 V or less when the vehicle is driven at 40 km/h S Open or short in heated oxygen sensor circuit
P0136
(25 mph) or more after the engine is warmed up. S Heated oxygen sensor
(2 trip detection logic).
HINT:
Sensor 2 refers to the sensor farther away from the engine body.
WIRING DIAGRAM
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control) on page DI-43 for the WIR-
ING DIAGRAM.
CONFIRMATION DRIVING PATTERN
Once Twice 11 times
40 sec. 40 sec. 40 sec.
Vehicle speed
or more or more or more
30 km/h
(19 mph) (d) (d) (d)
Idling(c) (e) (e) (e)
IG SW OFF
60 sec. 10 sec. 10 sec. 10 sec.
(a) (b) or more
A09300
(a) Connect the hand-held tester to the DLC3.
(b) Switch the hand-held tester from the Normal Mode to the Check (Test) Mode (See page DI-3 ).
(c) Start the engine and let the engine idle for 60 seconds or more.
(d) Drive the vehicle at 30 km/h (18 mph) or more for 40 seconds or more.
(e) Let the engine idle for 10 seconds or more.
(f) Preform steps (d) to (e) 11 times.
HINT:
If a malfunction exists, the CHK ENG (MIL) will be indicated on the multi information display during step (f).
NOTICE:
If the conditions in this test are not strictly followed, detection of the malfunction will not be possible.
If you do not have a hand-held tester, turn the ignition switch OFF after performing steps (c) to (f),
then perform steps (c) to (f) again.
2002 ECHO (RM884U)
Author : Date : 227
DI-58
DIAGNOSTICS - ENGINE
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.
1 Are there any other codes (besides DTC P0136) being output?
YES Go to relevant DTC chart.
NO
2 Check for open and short in harness and connector between ECM and oxygen
sensor (See page IN-29 ).
NG Repair or replace harness or connector.
OK
3 Check output voltage of oxygen sensor.
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand-held tester to the DLC3.
(b) Warm up the engine to normal operating temp.
CHECK:
Read voltage output of oxygen sensor when engine suddenly raced.
HINT:
Perform quick racing to 4,000 rpm 3 min. using accelerator pedal.
OK:
Oxygen sensor output voltage: Alternates from 0.40 V or less to 0.50 V or more.
OK Check that each connector is properly con-
nected.
NG
Replace oxygen sensor.
2002 ECHO (RM884U)
Author : Date : 228
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