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–192
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
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
)
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