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Diagnostic Procedure
NGEC0142
1 CHECK POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 1 (front) harness connector.
SEF331VA
3. Turn ignition switch ON.
4. Check voltage between terminal 1 and ground with CONSULT-II or tester.
SEF213W
Voltage: Battery voltage
OK or NG
OK 䊳 GO TO 3.
NG 䊳 GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the following.
쐌 Harness connectors M59, F27
쐌 15A fuse
쐌 Harness for open or short between heated oxygen sensor 1 (front) and 15A fuse
䊳 Repair harness or connectors.
3 CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between heated oxygen sensor 1 (front) terminal 3 and ECM terminal 119. Refer to the wiring
diagram.
Continuity should exist.
4. Also check harness for short to ground or short to power.
OK or NG
OK 䊳 GO TO 4.
NG 䊳 Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0135 HEATED OXYGEN SENSOR 1 HEATER (FRONT)
KA24DE
Diagnostic Procedure
EC-235
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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