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Diagnostic Procedure
NGEC0077
1 CHECK POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect engine coolant temperature sensor harness connector.
SEF330V
3. Turn ignition switch ON.
4. Check voltage between engine coolant temperature sensor terminal 1 and ground with CONSULT-II or tester.
SEF206W
Voltage: Approximately 5V
OK or NG
OK 䊳 GO TO 3.
NG 䊳 GO TO 2.
2 DETECT MALFUNCTIONING PART
Check the harness for open or short between ECM and engine coolant temperature sensor.
䊳 Repair harness or connectors.
3 CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check harness continuity between engine coolant temperature sensor terminal 2 and engine ground. Refer to EL-140.
Continuity should exist.
3. Also check harness for short to power.
OK or NG
OK 䊳 GO TO 5.
NG 䊳 GO TO 4.
4 DETECT MALFUNCTIONING PART
Check the harness for open or short between ECM and engine coolant temperature sensor.
䊳 Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0115 ENGINE COOLANT TEMPERATURE
SENSOR (ECTS) (CIRCUIT)
KA24DE
Diagnostic Procedure
EC-171
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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