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Toyota Sienna Service Manual: Engine Coolant Temperature / Intake Air Temperature Correlation

Toyota Sienna Service Manual / Engine / 2Gr-fe engine control system / Sfi system / Diagnostic trouble code chart / Engine Coolant Temperature / Intake Air Temperature Correlation

Engine Coolant Temperature / Intake Air Temperature Correlation

DESCRIPTION

The ECM calculates the difference between the readings of the coolant temperature sensor and intake air temperature sensor. If the difference is greater than 20°C (68°F), the ECM will judge this as a malfunction and will set this DTC.

Engine Coolant Temperature / Intake Air Temperature Correlation

Engine Coolant Temperature / Intake Air Temperature Correlation

HINT:

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

INSPECTION PROCEDURE

1 CHECK ANY OTHER DTCS OUTPUT (IN ADDITION P011B)

(a) Connect the intelligent tester to the DLC3.

(b) Turn the ignition switch to the ON position.

(c) Turn the tester on.

(d) Enter the following menus: DIAGNOSIS / ENHANCED OBD ll / DTC INFO / CURRENT CODES.

(e) Read the DTCs.

Result

HINT:

If any DTCs other than P011B are output, troubleshoot those DTCs first.

2 READ VALUE OF INTELLIGENT TESTER (INTAKE AIR TEMPERATURE)

(a) Leave the vehicle for 7 hours or more.

HINT:

It is necessary leave the vehicle for 7 hours or more to allow conditions similar to the DTC detection conditions.

(b) Connect the intelligent tester to the DLC3.

(c) Turn the ignition switch to the ON position.

(d) Turn the tester ON.

(e) Enter the following menus: DIAGNOSIS / ENHANCED OBD ll / DATA LIST / PRIMARY / INTAKE AIR.

(f) Read the value displayed on the tester.

OK: The intake air temperature and the outside air temperature are within 10°C (50°F) of each other.

HINT:

Temperature readings on the vehicle's outside temperature gauge (if equipped) are not suitable for comparing to the IAT reading. The outside temperature gauge has a significant delay built in to prevent temperature swings from being displayed on its display.

Use an accurate thermometer to determine the outside air temperature.

3 READ VALUE OF INTELLIGENT TESTER (COOLANT TEMPERATURE)

(a) Connect the intelligent tester to the DLC3.

(b) Turn the ignition switch to the ON position.

(c) Turn the tester ON.

(d) Enter the following menus: DIAGNOSIS / ENHANCED OBD ll / DATA LIST / PRIMARY / COOLANT TEMP.

OK: The coolant temperature and the outside air temperature are within 10°C (50°F) of each other.

HINT:

If the result is not as specified, check that there are heat sources such as a block heater in the engine compartment.

REPLACE ECM (See page ES-498)

Engine Coolant Temperature Circuit Range / Performance Problem
DESCRIPTION Refer to DTC P0115 (See page ES-133). MONITOR DESCRIPTION The ECT sensor is used to monitor the ECT. The ECT sensor has a built-in thermistor with a resistance that varies ac ...

Throttle / Pedal Position Sensor / Switch "A"
HINT: These DTCs relate to the Throttle Position (TP) sensor. DESCRIPTION HINT: This ETC (Electrical Throttle Control System) does not use a throttle cable. The Throttle Position (TP) senso ...

Other materials:

Precaution
1. INITIALIZATION NOTICE: Perform RESET MEMORY (AT initialization) when replacing the automatic transaxle assembly, engine assembly or ECM (See page AX-16). Perform REGISTRATION (VIN registration) when replacing the ECM (See page ES-15). HINT: Initializatio ...

Check component status
(a) Compare the test value with the minimum test limit (MIN LIMIT) and maximum test limit (MAX LIMIT). (b) If the test value is between the minimum test limit and maximum test limit, the component is functioning normally. If not, the component is malfunctioning. The test value is usually sign ...

Sensor signal check by test mode (signal check) (when using sst check wire)
(a) When having replaced the skid control ECU and/or yaw rate and deceleration sensor, perform zero point calibration of the yaw rate and deceleration sensor. HINT: If the ignition switch is turned from the ON position to the ACC or off during test mode (signal check), DTCs of the signal ...

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