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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:

Installation
1. INSTALL REAR DIFFERENTIAL SIDE GEAR SHAFT BOLT (a) Install the bolt tightening the nut through the plate washer. 2. INSTALL REAR DRIVE SHAFT ASSEMBLY LH HINT: (See page DS-26) 3. INSTALL REAR AXLE SHAFT NUT LH HINT: (See page DS-26) 4. INSTALL REAR SPEED SENSOR LH HINT: (See page D ...

Removal
1. REMOVE ROOF DRIP SIDE FINISH MOULDING Put protective tape around the roof drip side finish moulding. Using a remover for the roof moulding, disengage of the clips both in the front and rear ends of the roof drip side finish moulding and then remove the roof drip side finish moul ...

ECU Power Source Circuit
DESCRIPTION The position control ECU and switch assembly (power seat control switch and ECU) is contained in the switch assembly. During manual operation, only one switch signal is accepted. If signals are input from 2 or more switches simultaneously, all of them are ignored, except when s ...

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