Toyota FJ Cruiser (GSJ 10, 15 series). Manual — part 58

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES–187

ES

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, any of DTC P0327, P0328, P0332 or P0333 is set 5
seconds after the engine is next started.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

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

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

Related DTCs

P0327: Knock sensor (Bank 1) open/short (Low voltage)
P0328: Knock sensor (Bank 1) open/short (High voltage)
P0332: Knock sensor (Bank 2) open/short (Low voltage)
P0333: Knock sensor (Bank 2) open/short (High voltage)

Required Sensors/Components (Main)

Knock sensor (Bank 1 and 2)

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 more

Time after engine start

5 seconds or more

Knock sensor voltage

Less than 0.5 V

Knock sensor voltage

More than 4.5 V

ES–188

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES

WIRING DIAGRAM

INSPECTION PROCEDURE

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 an intelligent tester. Freeze frame data record 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.

Knock Sensor 1 (Bank 1)

Knock Sensor 2 (Bank 2)

BU1

BU1

BU1

BU1

(*1)

2

5

4

6

KNK1

EKNK

KNK2

EKN2

5 V

5 V

ECM

*1: Shielded

(*1)

(*1)

(*1)

U2

U1

1

2

1

2

29

B2

28

B2

21

B2

20

B2

A133416E02

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES–189

ES

(a) Disconnect the BU1 connector.
(b) Using lead wires, connect the connectors as follows.

(c) Warm up the engine.
(d) Run the engine at 3,000 rpm for 10 seconds or more.
(e) Connect an intelligent tester to the DLC3.
(f)

Turn the ignition switch ON and turn the tester ON.

(g) Select the item: DIAGNOSIS / ENHANCED OBD II /

DTC INFO / CURRENT CODES.

(h) Read DTCs.

Result

(i)

Reconnect the BU1 connector.

B

A

1

READ OUTPUT DTC (CHECK KNOCK SENSOR CIRCUIT)

Knock Sensor

BU1

ECM

1

2

2

2

2

29

B2

B2

B2

B2

28

21

20

5

5

6

6

1

4

4

BU1

Male

Connector

Female

Connector

EKN2

KNK2

EKNK

KNK1

A073822E13

Male Connector - Female Connector

Terminal 2 - Terminal 4

Terminal 5 - Terminal 6

Terminal 4 - Terminal 2

Terminal 6 - Terminal 5

Display

Proceed to

DTCs same as when vehicle brought in

P0327, P0328

→ P0327, P0328
or

P0332, P0333

→ P0332, P0333

A

DTCs different from when vehicle brought in

P0327, P0328

→ P0332, P0333
or

P0332, P0333

→ P0327, P0328

B

Go to step 4

ES–190

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES

(a) Disconnect the BU1 connector.
(b) Disconnect the B2 ECM connector.
(c) Check the resistance.

Standard Resistance (Check for open)

Standard Resistance (Check for short)

(d) Reconnect the BU1 connector.
(e) Reconnect the ECM connector.

NG

OK

(a) Disconnect the B2 ECM connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage between the ECM terminals.

Standard Voltage

(d) Reconnect the ECM connector.

NG

OK

2

CHECK HARNESS AND CONNECTOR (CONNECTOR - ECM)

Wire Harness Side:

Front View

ECM Connector

Female Connector

BU1

KNK2
KNK1

EKN2
EKNK

B2

A116288E04

Tester Connections

Specified Conditions

BU1 female connector 2 - KNK1 (B2-29)

Below 1

Ω

BU1 female connector 5 - EKNK (B2-28)

BU1 female connector 4 - KNK2 (B2-21)

BU1 female connector 6 - EKN2 (B2-20)

Tester Connections

Specified Conditions

BU1 female connector 2 or KNK1 (B2-29) - Body

ground

10 k

Ω or higher

BU1 female connector 5 or EKNK (B2-28) - Body

ground

BU1 female connector 4 or KNK2 (B2-21) - Body

ground

BU1 female connector 6 or EKN2 (B2-20) - Body

ground

REPAIR OR REPLACE HARNESS OR
CONNECTOR

3

INSPECT ECM

B2

ECM Connector

EKNK

EKN2

KNK2

KNK1

G035655E04

Tester Connections

Specified Conditions

KNK1 (B2-29) - EKNK (B2-28)

4.5 to 5.5 V

KNK2 (B2-21) - EKN2 (B2-20)

REPLACE ECM (See page

ES-446

)

CHECK FOR INTERMITTENT PROBLEMS