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
-
Connect the Techstream to the DLC3.
-
Turn the ignition switch to ON and turn the Techstream on.
-
Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure) (See page
).
-
Turn the ignition switch off and wait for at least 30 seconds.
-
Turn the ignition switch to ON and turn the Techstream on.
-
Start the engine and wait 10 seconds.
-
Enter the following menus: Powertrain / Engine / Trouble Codes.
-
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.
-
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
-
Input the DTC: P0327, P0328, P0332 or P0333.
-
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.
-
If no pending DTC is output, perform a universal trip and check for permanent DTCs (See page
).
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
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
|
OK
|
|
|
(a) Inspect the knock sensor (See page
).
HINT:
Perform "Inspection After Repair" after replacing the knock control sensor (See page
).
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
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|