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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:

Removal
1. REMOVE INSTRUMENT CLUSTER NO.1 FINISH PANEL CENTER 2. REMOVE INSTRUMENT CLUSTER NO.2 FINISH PANEL CENTER 3. REMOVE INSTRUMENT CLUSTER FINISH PANEL GARNISH 4. REMOVE NAVIGATION RECEIVER ASSEMBLY WITH BRACKET  Remove the 4 screws.  Disconnect the connector and remove the n ...

Removal
1. REMOVE ENGINE AND TRANSAXLE HINT: (See page EM-26) 2. REMOVE AUTOMATIC TRANSMISSION WITH TRANSFER HINT: (See page AX-164) 3. REMOVE NO. 1 TRANSFER CASE PLUG (a) Remove the No. 1 transfer case plug. (b) Remove the No. 1 gasket from the transfer case No. 1 plug. 4. REMOVE NO. 2 T ...

Transmission Range Sensor Circuit Malfunction (PRNDL Input)
DTC P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input) DESCRIPTION The park/neutral position switch detects the shift lever position and sends signals to the ECM. HINT: After confirming DTC P0705, use the intelligent tester to confirm the PNP switch signal in the ALL menu ...

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