DTC P0125 ENGINE COOLANT TEMPERATURE (ECT) SENSOR; Diagnostic Procedure (Cont'd); Steps 4-6; Component Inspection

EF & EC-7099prose procedure

Source typos preserved: "engine collant" for "engine coolant" in Step 5; "82 (179)" appears to be missing the °C unit. Component Inspection table omits the -10 (14) row that appears on EF & EC-7096; preserved as printed.

Continued from EF & EC-7098

CG10, CGA3

Diagnostic Procedure (Cont'd)

Step 4 — CHECK ENGINE COOLANT TEMPERATURE SENSOR

1
Refer to "Component Inspection", EC-7099.
2
OK or NG: - OK → GO TO 5. - NG → Replace engine coolant temperature sensor.

Step 5 — CHECK THERMOSTAT OPERATION

1
When the engine is cooled [lower than 82 (179), for cold area 88°C (180°F)], condition grasp lower radiator hose and confirm the engine collant does not flow.
2
OK or NG: - OK → GO TO 6. - NG → Repair or replace engine thermostat. Refer to LC-section, "Thermostat".

Step 6 — CHECK INTERMITTENT INCIDENT

1
Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT", EC-7070.
2
→ INSPECTION END.

Component Inspection

ENGINE COOLANT TEMPERATURE SENSOR

Check resistance as shown in the figure.

ECTS Resistance Reference

Temperature °C (°F)	Resistance kΩ
20 (68)	2.1 - 2.9
50 (122)	0.68 - 1.00
90 (194)	0.236 - 0.260

20 (68)

Resistance kΩ2.1 - 2.9

50 (122)

Resistance kΩ0.68 - 1.00

90 (194)

Resistance kΩ0.236 - 0.260

If NG, replace engine coolant temperature sensor.

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