Toyota FJ Cruiser (GSJ 10, 15 series). Instruction - part 59

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–191

ES

(a) Disconnect the BU1 connector.
(b) Check the resistance between the terminals of the BU1 

male connector.
Standard Resistance

(c) Reconnect the BU1 connector.

OK

NG

HINT:
•

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

•

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

(a) Disconnect the BU1 connector.
(b) Disconnect the U1 and U2 knock sensor connectors.
(c) Check the resistance.

Standard Resistance (Check for open)

Standard Resistance (Check for short)

(d) Reconnect the BU1 connector.
(e) Reconnect the knock sensor connector.

NG

OK

4

INSPECT KNOCK SENSOR

Wire Harness Side:

BU1

Front View

Male Connector

A072922E15

Tester Connections

Specified Conditions

BU1 male connector 2 - 5

120 to 280 k

Ω

BU1 male connector 4 - 6

CHECK FOR INTERMITTENT PROBLEMS

5

CHECK HARNESS AND CONNECTOR (CONNECTOR - KNOCK SENSOR)

U2

Front View

Male Connector

Wire Harness Side:

Bank 1

U1

Bank 2

Front View

BU1

Knock Sensor Connector

A116289E03

Tester Connections

Specified Conditions

BU1 male connector 2 - U2-2

Below 1 

Ω

BU1 male connector 5 - U2-1 

BU1 male connector 4 - U1-2

BU1 male connector 6 - U1-1

Tester Connections

Specified Conditions

BU1 male connector 2 or U2-2 - Body ground

10 k

Ω or higher

BU1 male connector 5 or U2-1 - Body ground

BU1 male connector 4 or U1-2 - Body ground

BU1 male connector 6 or U1-1 - Body ground

REPAIR OR REPLACE HARNESS OR 
CONNECTOR

REPLACE KNOCK SENSOR (See page 

ES-438

)

ES–192

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

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DESCRIPTION

The Crankshaft Position (CKP) sensor system consists of a CKP sensor plate and a pickup coil. The 
sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and a 
magnet.
The sensor plate rotates and, as each tooth passes through the pickup coil, a pulse signal is created. The 
pickup coil generates 34 signals per engine revolution. Based on these signals, the ECM calculates the 
crankshaft position and engine RPM. Using these calculations, the fuel injection time and ignition timing 
are controlled.

Reference: Inspection using an oscilloscope
HINT:
•

The correct waveform is shown above.

•

VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.

MONITOR DESCRIPTION

If there is no signal from the CKP sensor despite the engine revolving, the ECM interprets this as a 
malfunction of the sensor.
If the malfunction is not repaired successfully, a DTC is set 10 seconds after the engine is next started.

DTC

P0335

Crankshaft Position Sensor "A" Circuit

DTC

P0339

Crankshaft Position Sensor "A" Circuit Inter-
mittent

DTC No.

DTC Detection Conditions

Trouble Areas

P0335

•

No CKP sensor signal to ECM while cranking (1 trip 
detection logic)

•

No CKP sensor signal to ECM at engine speed of 600 rpm 
or more (1 trip detection logic)

•

Open or short in CKP sensor circuit

•

CKP sensor

•

Sensor plate (CKP sensor plate)

•

ECM

P0339

Under conditions (a), (b) and (c), no CKP sensor signal to ECM 
for 0.05 seconds or more (1 trip detection logic)
(a) Engine speed 1,000 rpm or more
(b) Starter signal OFF
(c) 3 seconds or more have elapsed since starter signal 
switched from ON to OFF

Items

Contents

Terminals

VV1+ - VV1-
VV2+ - VV2-

NE+ - NE-

Equipment Settings

5 V/DIV, 20 msec./DIV.

Conditions

Cranking or idling

NE

VV1

VV2

VV1, VV2 and NE Signal Waveforms

GND

GND

GND

G035795E10

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES–193

ES

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

All:

Case 1:

Case 2:

TYPICAL MALFUNCTION THRESHOLDS

Case 1:

Case 2:

COMPONENT OPERATING RANGE

Related DTCs

P0335: Crankshaft position sensor range check/rationality

Required Sensors/Components (Main)

Crankshaft Position (CKP) sensor

Required Sensors/Components (Related)

VVT sensor

Frequency of Operation

Continuous

Duration

Conditions met for 3 times

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Time after starter OFF to ON

0.3 seconds or more

Number of VVT sensor signal pulse

6 times

Battery voltage

7 V or more

Ignition switch

ON

Starter

OFF

Engine RPM

600 rpm or more

Time after starter from ON to OFF

3 seconds or more

Number of CKP sensor signal pulse

132 or less, or 174 or more

Engine speed signal

No signal

CKP sensor

•

CKP sensor output voltage fluctuates while crankshaft revolving

•

34 CKP sensor signals per crankshaft revolution

ES–194

1GR-FE ENGINE CONTROL SYSTEM  –  SFI SYSTEM

ES

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:
•

If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine 
mechanical systems.

•

Check the engine speed. The engine speed can be checked by using an intelligent tester. To check, 
follow the operation below:
(a)Connect an intelligent tester to the DLC3.
(b)Start the engine.
(c) Turn the tester ON
(d)Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / 

ENGINE SPD.
The engine speed may be indicated as zero despite the engine revolving normally. This is caused 
by a lack of NE signals from the Crankshaft Position (CKP) sensor. Alternatively, the engine speed 
may be indicated as lower than the actual engine speed, if the CKP sensor voltage output is 
insufficient.

•

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.

(a) Disconnect the B29 Crankshaft Position (CKP) sensor 

connector.

(b) Measure the resistance between terminals 1 and 2.

Standard Resistance

(c) Reconnect the CKP sensor connector.

NG

1

INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)

NE+

NE-

Crankshaft Position Sensor

Shielded

ECM

B29

1

2

21

B3

20

B3

A133476E01

Crankshaft Position Sensor

Front View

Component Side:

A078431E17

Tester Connections

Specified Conditions

1 - 2

1,850 

Ω to 2,450 Ω at 20°C (68°F)

REPLACE CRANKSHAFT POSITION 
SENSOR (See page 

ES-420

)