Toyota Yaris: Sfi System / Charge Air Cooler Temperature Sensor 2 Bank 1 Circuit Short to Ground (P10D311)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / Charge Air Cooler Temperature Sensor 2 Bank 1 Circuit Short to Ground (P10D311)

DESCRIPTION

The intake air temperature sensor, built into the No. 1 turbo pressure sensor, monitors the intake air temperature. The intake air temperature sensor has a built-in thermistor with a resistance that varies according to the temperature of the intake air. When the intake air temperature is low, the resistance of the thermistor increases. When the temperature is high, the resistance drops. These variations in resistance are transmitted to the ECM as voltage changes (See Fig. 1).

The intake air temperature sensor is powered by a 5 V supply from the THIM terminal of the ECM, via resistor R.

Resistor R and the intake air temperature sensor are connected in series. When the resistance value of the intake air temperature sensor changes, according to changes in the intake air temperature, the voltage at terminal THIM also varies. Based on this signal, the ECM increases the fuel injection volume when the engine is cold to improve driveability.

HINT:

When DTC P10D311 or P10D315 is stored, the ECM enters fail-safe mode. During fail-safe mode, the intake air temperature is estimated to be 45°C (113°F) by the ECM. Fail-safe mode continues until a pass condition is detected.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P10D311

Charge Air Cooler Temperature Sensor 2 Bank 1 Circuit Short to Ground

The output voltage from the intake air temperature sensor is 0.1 V or less for 3 seconds or more (1 trip detection logic).

  • Short in intake air temperature sensor circuit
  • Intake air temperature sensor (No. 1 turbo pressure sensor)
  • ECM

-

SAE: P10D5

HINT:

When a DTC is output, check the Data List item "Intake Air Temperature B1S2 (Turbo)" using the GTS.

Click here

DTC No.

Intake Air Temperature B1S2 (Turbo)

Malfunction

P10D311

140°C (284°F)

Short in THIM circuit to ground

If the Data List displays a normal value, the normal value may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.

MONITOR DESCRIPTION

The ECM calculates the intake manifold internal temperature from the intake air temperature sensor output voltage. If the intake air temperature sensor output voltage is outside the normal range, there may be a malfunction or open or short circuit in the intake air temperature sensor. In this case, the ECM stores a DTC.

Example:

When the sensor output voltage is 0.1 V or less for 3 seconds or more, the ECM stores DTC P10D311.

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the GTS on.
  6. Wait 5 seconds or more.
  7. Enter the following menus: Powertrain / Engine / Trouble Codes.
  8. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  9. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  10. Input the DTC: P10D311.
  11. Check the DTC judgment result.

    GTS Display

    Description

    NORMAL

    • DTC judgment completed
    • System normal

    ABNORMAL

    • DTC judgment completed
    • System abnormal

    INCOMPLETE

    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Read Freeze Frame Data using the GTS. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.

READ VALUE USING GTS (CHECK FOR SHORT IN WIRE HARNESS)

(a) Disconnect the No. 1 turbo pressure sensor connector.

*1

No. 1 turbo pressure sensor

*2

ECM

(b) Enter the following menus.

Powertrain > Engine > Data List

Tester Display

Intake Air Temperature B1S2 (Turbo)

(c) Read the value displayed on the GTS.

Standard value:

-40°C (-40°F)

OK

REPLACE NO. 1 TURBO PRESSURE SENSOR

NG

2.

CHECK HARNESS AND CONNECTOR (NO. 1 TURBO PRESSURE SENSOR - ECM)

(a) Disconnect the No. 1 turbo pressure sensor connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D95-4(THIM) or D104-99(THIM) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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