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)

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1 DIGNOSTICS SFI SYSTEM (MZFE) DTC P07 KNOCK SENSOR CIRCUIT LOW INPUT (NK OR SINGLE SENSOR) MOO0 DTC P08 KNOCK SENSOR CIRCUIT HIGH INPUT (NK OR SINGLE SENSOR) DTC P0 KNOCK SENSOR CIRCUIT LOW INPUT (NK ) DTC P0 KNOCK SENSOR CIRCUIT HIGH INPUT (NK ) CIRCUIT DESCRIPTION flat type knock sensor (nonresonant type) can detect vibrations in a wide band of frequency (about 6 khz to 5 khz) and has the following features: Knock sensors are fitted on the cylinder block to detect the engine knocking. The sensor contains a piezoelectric element which generates a voltage, when the cylinder block vibrates due to knocking. If engine knocking occurs, the ignition timing is retarded to suppress it. DTC No. DTC Detection Condition Trouble rea P07 P0 P08 P0 Output voltage of the knock sensor or is 0.5 V or less ( trip detection logic) Output voltage of the knock sensor or is.5 V or more ( trip detection logic) Short in knock sensor or circuit Knock sensor or Open in knock sensor or circuit Knock sensor or MONITOR DESCRIPTION The knock sensor, located on the cylinder block, detects spark knock. When spark knock occurs, the sensor picks up vibrations in a specific frequency range. When the detects the voltage in this frequency range, it retards the ignition timing to suppress the spark knock. The 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 0 seconds, and if the knock sensor output voltage is out of normal range, the interprets this as a fault in the knock sensor and sets a DTC. MONITOR STRTEGY Related DTCs Required sensors / components (Main) Required sensors / components (Related) Frequency of operation Duration MIL operation Sequence operation P07: (ank ) Range Check (Low voltage) P08: (ank ) Range Check (High voltage) P0: (ank ) Range Check (Low voltage) P0: (ank ) Range Check (High voltage) MF meter, CKP sensor, ECT sensor Continuous second Immediate None 005 HIGHLNDER REPIR MNUL (RMU) uthor : 77

2 0558 DIGNOSTICS TYPICL ENLING CONDITIONS ll: The monitor will run whenever these DTCs are not present See page 0577 Range Check P07, P08, P0, P00: attery voltage Time after engine start Ignition switch Starter 0.5 V or more 5 seconds or more ON OFF TYPICL MLFUNCTION THRESHOLDS Range Check (Low voltage) P07, P0: Knock sensor Voltage Less than 0.5 V Range Check (High voltage) P08, P0: Knock sensor voltage WIRING DIGRM More than.5 V SFI SYSTEM (MZFE) K Shielded KNK 5 V W W 8 K R R Shielded KNK 5 V G G 0 EKN ED R J7 J/C 878 INSPECTION PROCEDURE DTC P07 and P08 are for the bank knock sensor circuit. DTC P0 and P0 are for the bank knock sensor circuit. Read freeze frame data using the hand held tester or the OD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the airfuel ratio was lean or rich, and other data from the time the malfunction occurred. 005 HIGHLNDER REPIR MNUL (RMU) uthor : 78

3 DIGNOSTICS SFI SYSTEM (MZFE) 0559 RED OUTPUT DTC (CHECK KNOCK SENSOR CIRCUIT) Male Connector KNK 8 KNK 0 EKN Female Connector (d) (e) Disconnect the connector. Using lead wires, connect the terminals as follows. Male Connector Female Connector Terminal Terminal Terminal Terminal Terminal Terminal Terminal Terminal Warm up the engine. Run the engine at,000 rpm for 0 seconds or more. Check the DTC. Result: Display Proceed to DTC same as when vehicle brought in P07, P08 P07, P08 or P0, P0 P0, P DTC different from when vehicle brought in P07, P08 P0, P0 or P0, P0 P07, P08 Go to step CHECK WIRE HRNESS ( CONNECTOR ) Female Connector Disconnect the connector. Disconnect the connector. Check the resistance of the wire harness side connector. of female connector (KNK) of female connector 8 () of female connector (KNK) of female connector 0 (EKN) of female connector or (KNK) ody ground of female connector or 8 () ody ground of female connector or (KNK) ody ground of female connector or 0 (EKN) ody ground elow Ω 0 kω or higher KNK KNK EKN NG REPIR OR REPLCE HRNESS ND CONNECTOR 005 HIGHLNDER REPIR MNUL (RMU) uthor : 79

4 0550 DIGNOSTICS SFI SYSTEM (MZFE) INSPECT KNK KNK EKN Disconnect the connector. Turn the ignition switch ON. Check the voltage of the terminals. Voltage: (KNK) 8 () (KNK) 0 (EKN).5 to 5.5 V KNK and KNK Signal Waveform V / DIV GND msec./ Division 8586 Reference: Inspection using the oscilloscope. fter warming up, run the engine at,000 rpm, and check the waveform of the connector. (KNK) 8 () (KNK) 0 (EKN) Correct waveform is as shown NG REPLCE (See page 0 ) CHECK FOR INTERMITTENT PROLEMS (See page 0570 ) NOTICE: Fault may be intermittent. Check harness and connectors carefully and retest. INSPECT KNOCK SENSOR Male Connector 798 Disconnect the connector. Check the resistance between the terminals of the male connector. of male connector of male connector 0 to 80 kω CHECK FOR INTERMITTENT PROLEMS (See page 0570 ) NG 005 HIGHLNDER REPIR MNUL (RMU) uthor : 70

5 DIGNOSTICS SFI SYSTEM (MZFE) CHECK WIRE HRNESS Male Connector K (ank ) K (ank ) Y If DTC P07 has changed to P08, or if DTC P0 has changed to P0, check the knock sensor circuit on the bank side. If DTC P0 has changed to P07, or if DTC P0 has changed to P08, check the knock sensor circuit on the bank side. Disconnect the connector. Disconnect the K or K knock sensor connector. Check the resistance of the wire harness side connectors. of male connector K of male connector K of male connector K of male connector K of male connector or K ody ground of male connector or K ody ground of male connector or K ody ground of male connector or K ody ground elow Ω 0 kω or higher NG REPIR OR REPLCE HRNESS ND CONNECTOR REPLCE KNOCK SENSOR (See page 00 ) 005 HIGHLNDER REPIR MNUL (RMU) uthor : 7