Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM1000000018DLR |
Model Year Start: 2018 |
Model: Sienna |
Prod Date Range: [11/2017 -
] |
Title: 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: P032511,P033011; Knock Sensor 1 Bank 1 or Single Sensor Circuit Short to Ground; 2018 - 2020 MY Sienna [11/2017 - ] |
DTC
|
P032511
|
Knock Sensor 1 Bank 1 or Single Sensor Circuit Short to Ground
|
DTC
|
P033011
|
Knock Sensor 2 Bank 2 Circuit Short to Ground
|
DESCRIPTION
A flat-type knock sensor (non-resonant type) has a structure that can detect vibrations between approximately 5 kHz and 15 kHz.
The knock sensor is 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.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
MIL
|
Memory
|
Note
|
P032511
|
Knock Sensor 1 Bank 1 or Single Sensor Circuit Short to Ground
|
The knock sensor (bank 1) output voltage is less than 0.5 V for 1 second or more (1 trip detection logic).
|
-
Short in knock sensor (bank 1) circuit
-
Knock sensor (bank 1)
-
ECM
|
Comes on
|
DTC stored
|
-
SAE Code: P0327
-
DTC for Mexico Models: Applies
|
P033011
|
Knock Sensor 2 Bank 2 Circuit Short to Ground
|
The knock sensor (bank 2) output voltage is less than 0.5 V for 1 second or more (1 trip detection logic).
|
-
Short in knock sensor (bank 2) circuit
-
Knock sensor (bank 2)
-
ECM
|
Comes on
|
DTC stored
|
-
SAE Code: P0332
-
DTC for Mexico Models: Applies
|
HINT:
When DTC P032511 is 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
HINT:
The correct waveform is as shown.
ECM Terminal Name
|
Between KNK1 and EKNK
Between KNK2 and EKN2
|
Tester Range
|
1 V/DIV., 1 ms./DIV.
|
Condition
|
Engine speed maintained at 4000 rpm after warming up engine
|
MONITOR DESCRIPTION
If the output voltage transmitted by the knock sensor remains low for 1 second or more, the ECM interprets this as a malfunction in the sensor circuit, and stores this DTC.
MONITOR STRATEGY
Related DTCs
|
P0327: Knock sensor (bank 1) range check (low voltage)
P0332: Knock sensor (bank 2) range check (low 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
|
TYPICAL ENABLING CONDITIONS
Monitor runs whenever the following DTCs are not stored
|
None
|
Both of the following conditions are met
|
-
|
Battery voltage
|
10.5 V or higher
|
Time after engine start
|
5 seconds or more
|
TYPICAL MALFUNCTION THRESHOLDS
Knock sensor voltage
|
Less than 0.5 V
|
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
-
Connect the Techstream to the DLC3.
-
Turn the ignition switch to ON and turn the Techstream on.
-
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
-
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 5 minutes [A].
-
Enter the following menus: Powertrain / Engine / Trouble Codes [B].
-
Read the 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: P032511 or P033011.
-
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
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
PROCEDURE
1.
|
CHECK TERMINAL VOLTAGE (POWER SOURCE OF KNOCK SENSOR)
|
*a
|
Front view of wire harness connector
(to Knock Sensor)
|
*b
|
Bank 1
|
*c
|
Bank 2
|
(a) Disconnect the knock sensor connector.
(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
|
f3-2 - f3-1
|
Ignition switch ON
|
4.5 to 5.5 V
|
f5-2 - f5-1
|
Ignition switch ON
|
4.5 to 5.5 V
|
OK
|
|
|
(a) Inspect the knock sensor.
Click here
HINT:
Perform "Inspection After Repair" after replacing the knock sensor.
Click here
3.
|
CHECK HARNESS AND CONNECTOR (KNOCK SENSOR - ECM)
|
(a) Disconnect the f3 and f5 knock sensor connectors.
(b) Disconnect the B67 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
f3-2 or B67-82 (KNK1) - Body ground
|
Always
|
10 kΩ or higher
|
f5-2 or B67-114 (KNK2) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
4.
|
CHECK WHETHER DTC OUTPUT RECURS (DTC P032511 OR p033011)
|
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs.
(e) Turn the ignition switch off and wait for at least 30 seconds.
(f) Turn the ignition switch to ON.
(g) Turn the Techstream on.
(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine / Trouble Codes.
(j) Read the DTCs.
Result
|
Proceed to
|
DTCs are not output
|
A
|
DTC P032511 or P033011 is output
|
B
|
|