Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIAA
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: 2GR-FE (ENGINE CONTROL): SFI SYSTEM: P0327,P0328,P0332,P0333; Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor); 2016 MY Sienna [12/2015 - 08/2016]

DTC

P0327

Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)

DTC

P0328

Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)

DTC

P0332

Knock Sensor 2 Circuit Low Input (Bank 2)

DTC

P0333

Knock Sensor 2 Circuit High Input (Bank 2)

DESCRIPTION

A flat type knock sensor (non-resonant type) has a structure that can detect vibration between approximately 5 kHz and 15 kHz.

knock sensors are fitted onto the engine block to detect engine knocking.

The knock sensor contains a piezoelectric element which generates a voltage when it becomes deformed.

The voltage is generated when the engine block vibrates due to knocking. Any occurrence of engine knocking can be suppressed by delaying the ignition timing.

DTC No.

DTC Detection Condition

Trouble Area

P0327

P0332

Output voltage of knock sensor (bank 1 or 2) is 0.5 V or less

(1 trip detection logic)
  • Short in knock sensor (bank 1, 2) circuit
  • Knock sensor (bank 1, 2)
  • ECM

P0328

P0333

Output voltage of knock sensor (bank 1 or 2) is 4.5 V or more

(1 trip detection logic)
  • Open in knock sensor (bank 1, 2) circuit
  • Knock sensor (bank 1, 2)
  • ECM

HINT:

When any of DTCs P0327, P0328, P0332 and P0333 are stored, the ECM enters fail-safe mode. During fail-safe mode, the ignition timing is delayed to its maximum retardation. Fail-safe mode continues until the ignition switch is turned off.

Reference: Inspection using an oscilloscope

The correct waveform is as shown in the illustration.

Item

Content

ECM Terminal Name

Between KNK1 and EKNK, or KNK2 and EKN2

Tester Range

1 V/DIV., 1 ms./DIV.

Condition

Engine speed maintained at 4000 rpm after warming up engine

MONITOR DESCRIPTION

The knock sensor, located on the cylinder block, detects spark knock. When spark knock occurs, the piezoelectric element of the sensor vibrates. When the ECM detects a voltage in this frequency range, it retards the ignition timing to suppress the spark knock.

The ECM also senses background engine noise with the knock sensor and uses this noise to check for faults in the sensor. If the knock sensor signal level is too low for more than 10 seconds, or if the knock sensor output voltage is outside the normal range, the ECM interprets this as a fault in the knock sensor and stores a DTC.

MONITOR STRATEGY

Related DTCs

P0327: Knock sensor (bank 1) range check (Low voltage)

P0328: Knock sensor (bank 1) range check (High voltage)

P0332: Knock sensor (bank 2) range check (Low voltage)

P0333: Knock sensor (bank 2) range check (High voltage)

Required Sensors/Components (Main)

Knock sensor (bank 1, 2)

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

1 second

MIL Operation

Immediately

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs are not present

None

Battery voltage

10.5 V or higher

Time after engine start

5 seconds or more

Ignition switch

ON

Starter

OFF

TYPICAL MALFUNCTION THRESHOLDS

Knock Sensor Range Check (Low Voltage): P0327 and P0332

Knock sensor voltage

Less than 0.5 V

Knock Sensor Range Check (High Voltage): P0328 and P0333

Knock sensor voltage

Higher than 4.5 V

COMPONENT OPERATING RANGE

Knock sensor voltage

0.5 V or higher, and 4.5 V or less

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure) (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Start the engine and wait 10 seconds.
  7. Enter the following menus: Powertrain / Engine / Trouble Codes.
  8. Read 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: P0327, P0328, P0332 or P0333.
  11. Check the DTC judgment result.

    Techstream 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

    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    If the judgment result shows INCOMPLETE or N/A, idle the engine for 5 minutes and check the DTC judgment result again.

  12. If no pending DTC is output, perform a universal trip and check for permanent DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

  • DTCs P0327 and P0328 are for the bank 1 knock sensor circuit.
  • DTCs P0332 and P0333 are for the bank 2 knock sensor circuit.
  • Read freeze frame data using the Techstream. 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.
  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transaxle.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

PROCEDURE

1.

INSPECT ECM (KNK1, KNK2 VOLTAGE)

(a) Disconnect the knock sensor connectors.

(b) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

f2-1 - f2-2

Ignition switch ON

4.5 to 5.5 V

f1-1 - f1-2

Ignition switch ON

4.5 to 5.5 V

Text in Illustration

*a

Front view of wire harness connector

(to Knock sensor)

*b

for Bank 1

*c

for Bank 2
NG

GO TO STEP 3

OK

2.

INSPECT KNOCK SENSOR

(a) Inspect the knock sensor (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): KNOCK SENSOR: INSPECTION ).

HINT:

Perform "Inspection After Repair" after replacing the knock control sensor (See page 2016 MY Sienna [12/2015 - 08/2016]; 2GR-FE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION ).

OK

REPLACE ECM

NG

REPLACE KNOCK SENSOR

3.

CHECK HARNESS AND CONNECTOR (KNOCK SENSOR - ECM)

(a) Disconnect the f1 and f2 knock sensor connector.

(b) Disconnect the B1 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

f2-2 - B1-94 (KNK1)

Always

Below 1 Ω

f2-1 - B1-93 (EKNK)

Always

Below 1 Ω

f1-2 - B1-117 (KNK2)

Always

Below 1 Ω

f1-1 - B1-116 (EKN2)

Always

Below 1 Ω

f2-2 or B1-94 (KNK1) - Body ground

Always

10 kΩ or higher

f2-1 or B1-93 (EKNK) - Body ground

Always

10 kΩ or higher

f1-2 or B1-117 (KNK2) - Body ground

Always

10 kΩ or higher

f1-1 or B1-116 (EKN2) - Body ground

Always

10 kΩ or higher
OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR