Description
The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
<Reference data>
*: These data are reference values and are measured between ECM terminals 46 (Engine coolant temperature sensor) and 52 (Sensor ground).
DTC Logic
DTC DETECTION LOGIC
NOTE:
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
2.CHECK ENGINE COOLANT TEMPERATURE SENSOR FUNCTION
With CONSULT
With GST
Follow the procedure "With CONSULT" above.
3.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
If "COOLAN TEMP/S" increases to more than 10C (50F) within 65 minutes, stop engine because the test result will be OK. CAUTION: Never overheat engine.
With GST
Follow the procedure "With CONSULT" above.
Diagnosis Procedure
1.CHECK GROUND CONNECTION
2.CHECK ENGINE COOLANT TEMPERATURE SENSOR
3.CHECK THERMOSTAT OPERATION
When the engine is cold [lower than 70C (158F)] condition, grasp lower radiator hose and confirm that the engine coolant does not flow.
4.CHECK INTERMITTENT INCIDENT
Component Inspection
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Performance test
Inspection
INSPECTION PROCEDURE
Connect recovery/recycling/recharging equipment (for HFC-134a) or
manifold gauge.
Start the engine, and set to the following condition.
Maintain test condition until A/C system becomes stable. (Approximately
10 minutes)
Check that test results ...
Intake Manifold
Removal and Installation
Intake manifold
Intake manifold gaskets
Refer to INSTALLATION
REMOVAL
WARNING: To avoid the danger of being
scalded, do not drain the coolant when the engine is hot.
Release the fuel pressure. Refer to EC-592, "Inspection".
Disconnect the ba ...
B2617 starter relay circuit
Description
Located in IPDM E/R, it runs the starter motor. The
starter relay is turned ON by the BCM when the ignition
switch is in START position. IPDM E/R transmits the starter relay ON signal to
BCM via CAN communication.
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC B2617 is displ ...