Toyota Tundra. Manual — part 1369

MONITOR DESCRIPTION

If the output voltage transmitted by the knock sensor remains low or high for more than 1 second, the ECM
interprets this as a malfunction in the sensor circuit, and sets a DTC.

The monitor for DTCs P0327, P0328, P0332 and P0333 begins to run when 5 seconds have elapsed since the
engine was started.

If the malfunction is not repaired successfully, DTC P0327, P0328, P0332 or P0333 is set 5 seconds after the
engine is next started.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

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

TYPICAL MALFUNCTION THRESHOLDS - KNOCK SENSOR RANGE CHECK (LOW VOLTAGE)
P0327 AND P0332

Knock Sensor Range Check (High voltage) P0327 and P0333:

TYPICAL MALFUNCTION THRESHOLDS - KNOCK SENSOR RANGE CHECK (HIGH
VOLTAGE) P0327 AND P0333

Related DTCs

P0327: Knock sensor (for bank 1) range check (Low voltage)
P0328: Knock sensor (for bank 1) range check (High voltage)
P0332: Knock sensor (for bank 2) range check (Low voltage)
P0333: Knock sensor (for bank 2) range check (High voltage)

Required Sensors/Components (Main)

Knock sensor

Required Sensors/Components (Related) -
Frequency of Operation

Continuous

Duration

1 second

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Battery voltage

10.5 V or higher

Time after engine start

5 seconds or more

Knock sensor voltage

Less than 0.5 V

Knock sensor voltage

Higher than 4.5 V

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

WIRING DIAGRAM

Fig. 118: Knock Sensor 1 & 2 - Wiring Diagram

INSPECTION PROCEDURE

HINT:



DTCs P0327 and P0328 are the bank 1 knock sensor circuit.



DTCs P0332 and P0333 are the bank 2 knock sensor circuit.



Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. 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.

1. READ DTC OUTPUT (CHECK KNOCK SENSOR CIRCUIT)

a. Disconnect the ED2 connector.

b. Using lead wires, connect the connectors as follows:

MALE CONNECTOR - FEMALE CONNECTOR CONNECTORS REFERENCE

Male Connector - Female Connector

Terminal 10 - Terminal 4

Terminal 9 - Terminal 5

Terminal 4 - Terminal 10

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

c. Connect the Techstream to the DLC3.

d. Turn the ignition switch to ON and turn the Techstream ON.

e. Clear DTCs. (See DTC CHECK/CLEAR ).

f. Warm up the engine.

g. Run the engine at 3000 RPM for 10 seconds or more.

h. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.

i. Read the DTCs.

Fig. 119: Identifying ED2 Connector Terminal

Result

RESULT REFERENCE

Terminal 5 - Terminal 9

Result

Proceed

To

DTC is same as when vehicle brought in (for example, P0327 and P0328 are output
again, or P0332 and P0333 are output again)

A

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

HINT:



If DTC P0327 or P0328 has changed to P0332 or P0333, check the knock sensor circuit on
the left bank side.



If DTC P0332 or P0333 has changed to P0327 or P0328, check the knock sensor circuit on
the right bank side.

B : Go to step 4

A : Go To Next Step

2. CHECK HARNESS AND CONNECTOR (CONNECTOR - ECM)

a. Disconnect the ED2 connector.

b. Disconnect the D74 ECM connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

DTC is different from when vehicle brought in (for example, P0327 and P0328 are
output at first, but then P0332 and P0333 are output, or vice versa)

B

Tester Connection

Condition Specified Condition

ED2 male connector 10 - D74-94 (KNK1)

Always

Below 1 ohms

ED2 male connector 9 - D74-93 (EKNK)

Always

Below 1 ohms

ED2 male connector 4 - D74-117 (KNK2)

Always

Below 1 ohms

ED2 male connector 5 - D74-116 (EKN2)

Always

Below 1 ohms

ED2 male connector 10 or D74-94 (KNK1) - Body ground Always

10 kohms or higher

ED2 male connector 9 or D74-93 (EKNK) - Body ground

Always

10 kohms or higher

ED2 male connector 4 or D74-117 (KNK2) - Body ground Always

10 kohms or higher

ED2 male connector 5 or D74-116 (EKN2) - Body ground

Always

10 kohms or higher

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra