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john, The Car Guy
Category: Toyota
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Experience:  ase tech over 15 years in the field
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knock sensor ( 2 of ) location on 07 camry - pics , schematics

Resolved Question:

knock sensor ( 2 of ) location on 07 camry - pics , schematics and service manual of repair/ replace procedure
Submitted: 4 years ago.
Category: Toyota
Expert:  john replied 4 years ago.
graphic
Notes

REMOVAL

  1. DISCHARGE FUEL SYSTEM PRESSURE
  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
  3. REMOVE NO. 1 ENGINE COVER
  4. DRAIN COOLANT
  5. REMOVE WINDSHIELD WIPER ARM AND BLADE ASSEMBLY LH
  6. REMOVE WINDSHIELD WIPER ARM AND BLADE ASSEMBLY RH
  7. REMOVE FRONT FENDER TO COWL SIDE SEAL LH
  8. REMOVE FRONT FENDER TO COWL SIDE SEAL RH
  9. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY
  10. REMOVE WINDSHIELD WIPER MOTOR AND LINK
  11. REMOVE COWL TOP PANEL OUTER SUB-ASSEMBLY

graphic

  1. Remove the 4 bolts, 4 nuts and cowl top panel outer sub-assembly.
    1. REMOVE AIR CLEANER CAP SUB-ASSEMBLY
    2. REMOVE AIR CLEANER CASE SUB-ASSEMBLY
    3. REMOVE THROTTLE BODY
    4. DISCONNECT FUEL TUBE
    5. REMOVE FUEL DELIVERY PIPE WITH INJECTOR
    6. REMOVE INTAKE MANIFOLD
    7. graphic
    8. Disconnect the union to check valve hose from the brake booster.
    9. Disconnect the camshaft timing oil control valve connector.
    10. Remove the wire harness clamp.
    11. Remove the union to check valve hose from the vacuum hose clamp.
    12. Remove the 5 bolts, 2 nuts and intake manifold

      1. Remove the gasket from the intake manifold.
        1. REMOVE KNOCK SENSOR
        2. graphicgraphic

          1. Disconnect the knock sensor connector.
          2. Remove the nut and knock sensor.

          INSTALLATION

          1. INSTALL KNOCK SENSOR

            1. Install the knock sensor with the nut. Torque: 20 N.m (204 kgf.cm, 15 ft.lbf) NOTE: Make sure that the knock sensor is in the correct position.
            2. Connect the knock sensor connector.
              1. INSTALL INTAKE MANIFOLD
            graphic

            1. Install a new gasket into the intake manifold.

            1. Install the intake manifold with the 5 bolts and 2 nuts. Torque: 30 N.m (306 kgf.cm, 22 ft.lbf)
            2. Fit the union to check valve hose into the vacuum hose clamp.
            3. Install the wire harness clamp.
            4. Connect the camshaft timing oil control valve connector.
            5. Connect the union to check valve hose to the brake booster.
              1. INSTALL FUEL DELIVERY PIPE WITH INJECTOR
              2. INSTALL FUEL TUBE
              3. INSTALL THROTTLE BODY
              4. INSTALL AIR CLEANER CASE SUB-ASSEMBLY
              5. INSTALL AIR CLEANER CAP SUB-ASSEMBLY
              6. INSTALL AIR CLEANER INLET ASSEMBLY
              7. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
              8. ADD ENGINE COOLANT
              9. CHECK FOR ENGINE COOLANT LEAKS
              10. CHECK FOR FUEL LEAKS
              11. INSTALL NO. 1 ENGINE COVER SUB-ASSEMBLY
              12. INSTALL COWL TOP PANEL OUTER SUB-ASSEMBLY

            1. Install the outer cowl top panel sub-assembly with the 4 bolts and 4 nuts. Torque: Bolt 5.0 N.m (51 kgf.cm, 44 in.lbf) Nut 85 N.m (867 kgf.cm, 44 ft.lbf)
              1. INSTALL WINDSHIELD WIPER MOTOR AND LINK
              2. INSTALL COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY
              3. INSTALL FRONT FENDER TO COWL SIDE SEAL RH
              4. INSTALL FRONT FENDER TO COWL SIDE SEAL LH
              5. INSTALL WINDSHIELD WIPER ARM AND BLADE ASSEMBLY LH
              6. INSTALL WINDSHIELD WIPER ARM AND BLADE ASSEMBLY RH

             

             

Customer: replied 4 years ago.
part supplies show 2 knock sensors for this car - you have indicated the intake (yes my problem is loss of power ) - where is the other located and what symptoms would the failure of this unit show up as ? also how do we differentiate between the two if the suppliers have no listing as to which is which ?
Expert:  john replied 4 years ago.

there is one here is the toyota part number

Parts Information
PartOEM PartPrice
Knock Sensor
Knock Sensor8961506010$184.05Notes
do you know the diagnostic code? I cant recall every seeing one cause a power loss

Customer: replied 4 years ago.
PO328 ( ECM Knock Sensor 1 - high input bank 1) - yes upon acceleration - loss of power - just want to be positive to order and install correct unit. Thanks
Expert:  john replied 4 years ago.

here is the test chart

P0328
Notes

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)

DESCRIPTION

DTC Detection Condition

Flat type knock sensors (non-resonant type) have structures that can detect vibrations over a wide band of frequencies: between approximately 6 kHz and 15 kHz .

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.

HINT: When any of DTCs P0327 and P0328 are set, 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.

MONITOR DESCRIPTION

Monitor Strategy

Typical Enabling Conditions

Typical Malfunction Thresholds

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 and P0328 begins to run when 5 seconds have elapsed since the engine was started.

If the malfunction is not repaired successfully, either DTC P0327 or P0328 is set 5 seconds after the engine is next started.

Wiring Diagram


Step 1

Step 2-3

Step 4

INSPECTION PROCEDURE

HINT: Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

 

 

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Experience: ase tech over 15 years in the field
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