Replace Ecm

1GR-FE ENGINE CONTROL SYSTEM - ENGINE COOLANT TEMPERATURE SENSOR

Ohmmeter

Acceptable

F) Z017274E

Acceptable

F) Z017274E

ENGINE COOLANT TEMPERATURE SENSOR

REMOVAL

1. DISCHARGE FUEL SYSTEM PRESSURE

2. DRAIN ENGINE COOLANT (See page CO-3)

3. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

4. REMOVE V-BANK COVER (See page ES-414)

5. REMOVE AIR CLEANER ASSEMBLY (See page ES-415)

6. REMOVE INTAKE AIR SURGE TANK (See page FU-11)

7. DISCONNECT FUEL PIPE SUB-ASSEMBLY NO.2 (See page FU-13)

8. REMOVE ENGINE COOLANT TEMPERATURE SENSOR

(a) Disconnect the connector.

(b) Using a 19 mm deep socket wrench, remove the water temperature sensor and gasket.

INSPECTION

1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

(a) Check the resistance.

(1) Using an ohmmeter, measure the resistance between the terminals. Resistance

Tester Connection

Specified Condition

1 (E2) - 2 (THW)

2.32 to 2.59 kQ at 20°C (68°F)

1 (E2) - 2 (THW)

0.310 to 0.326 kQ at 80°C (176°F)

NOTICE:

If checking the engine coolant temperature sensor in water, be careful not to allow water to enter the terminals. After checking, wipe the water off the engine coolant temperature sensor. If the result is not as specified, replace the engine coolant temperature sensor.

1GR-FE ENGINE CONTROL SYSTEM - ENGINE COOLANT TEMPERATURE SENSOR

INSTALLATION

1. INSTALL E.F.I. ENGINE COOLANT TEMPERATURE SENSOR

(a) Using a 19 mm deep socket wrench, install the water temperature sensor with a new gasket. Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf)

(b) Connect the connector.

CONNECT FUEL PIPE SUB-ASSEMBLY NO.2 (See page FU-17)

INSTALL INTAKE AIR SURGE TANK (See page FU-17)

INSTALL AIR CLEANER ASSEMBLY

CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

ADD ENGINE COOLANT (See page CO-3)

CHECK FOR FUEL LEAKAGE

CHECK FOR ENGINE COOLANT LEAKAGE (See page CO-4)

9. INSTALL V-BANK COVER (See page ES-416)

DTC

P2121

Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance

HINT:

This DTC relates to the Accelerator Pedal Position (APP) sensor. DESCRIPTION

Refer to DTC P2120 (See page ES-293).

DTC No.

DTC Detection Conditions

Trouble Areas

P2121

Difference between VPA and VPA2 less than 0.4 V, or more than 1.2 V for 0.5 seconds (1 trip detection logic)

• Accelerator position sensor

• ECM

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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