196 1GR-FE EINE CONTROL SYSTEM SFI SYSTEM P0340 P0342 P0343 Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor) Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor) Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor) P0345 Camshaft Position Sensor "A" Circuit (Bank 2) P0347 Camshaft Position Sensor "A" Circuit Low Input (Bank 2) P0348 Camshaft Position Sensor "A" Circuit High Input (Bank 2) DCRIPTION The variable valve timing (VVT) sensor (VV signal) consists of a magnet, iron core and pickup coil. The VV signal plate has 3 teeth on its outer circumference and is installed on the camshaft timing pulley. When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil change, causing fluctuations in the magnetic field and generating a voltage in the pickup coil. This sensor monitors a timing rotor located on the camshaft and is used to detect a camshaft angle by the ECM. The camshaft rotation synchronizes with the crankshaft rotation, and this sensor communicates the rotation of the camshaft timing rotor as a pulse signal to the ECM. Based on the signal, the ECM controls fuel injection time and ignition timing. No. Detection Conditions Trouble Areas P0340 P0345 P0342 P0347 P0343 P0348 Input voltage to ECM remains 0.3 V or less, or 4.7 V or higher for more than 5 seconds, when 2 or more seconds have elapsed after turning the ignition switch ON (2 trip detection logic) No VVT sensor signal to ECM during cranking (1 trip detection logic) Output voltage of VVT sensor is 0.3 V or less for 5 seconds (1 trip detection logic) Output voltage of VVT sensor is 4.7 V or more for 5 seconds (1 trip detection logic) Reference: Inspection using an oscilloscope Open or short in VVT sensor circuit VVT sensor Camshaft timing pulley Jumped tooth of timing chain ECM Open or short in VVT sensor circuit VVT sensor Camshaft timing pulley Jumped tooth of timing chain ECM Open or short in VVT sensor circuit VVT sensor Camshaft timing pulley Jumped tooth of timing chain ECM
1GR-FE EINE CONTROL SYSTEM SFI SYSTEM 197 VV1, VV2 and NE Signal Waveforms 5 V/DIV. NE VV1 VV2 20 ms/div. G035795E20 HINT: The correct waveform is shown on the illustration. VV1+ and VV2+ stands for the VVT sensor signal, and NE+ stands for the CKP sensor signal. Items Terminals Equipment Settings Conditions Contents NE+ - NE- VV1+ - VV1- VV2+ - VV2-5V/Division, 20ms/Division Cranking or idling MONITOR DCRIPTION If there is no signal from the VVT sensor even though the engine is turning, or if the rotation of the camshaft and crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor. MONITOR STRATEGY Related s Required Sensors / Components (Main) Required Sensors / Components (Related) Frequency of Operation Duration MIL Operation Sequence of Operation P0340: Camshaft position sensor range check P0340: Camshaft position/crankshaft position misalignment P0340: Camshaft position sensor range check (Chattering) P0342: Camshaft position sensor range check (Low voltage) P0343: Camshaft position sensor range check (High voltage) P0345: VVT sensor range check (While starting engine) P0345: VVT sensor range check (After starting engine) P0345: VVT sensor range check (Chattering) P0347: VVT sensor range check (Low voltage) P0348: VVT sensor range check (High voltage) VVT sensor, Camshaft position sensor Crankshaft position sensor Continuous 4 seconds: P0340 (Camshaft position sensor range check), P0345 (VVT sensor range check (While starting engine)) 5 seconds: Others 2 driving cycles: P0340 (Camshaft position sensor range check), P0345 (VVT sensor range check (While starting engine)) Immediate: Others None TYPICAL ENABLI CONDITIONS All: The monitor will run whenever these s are not present None
198 1GR-FE EINE CONTROL SYSTEM SFI SYSTEM Camshaft Position Sensor Range Check: Minimal battery voltage while starter ON ON and not starter ON again Less than 11 V Camshaft Position/Crankshaft Position Misalignment: Engine RPM 600 rpm or more Camshaft Position Sensor Range Check (Chattering, Low voltage, High voltage): Ignition switch ON and time after ignition switch is to ON 2 seconds or more VVT sensor range check (While starting engine): ON Battery voltage while starter ON once at least Less than 11 V VVT sensor range check (After starting engine): Engine RPM Battery voltage Ignition switch VVT sensor range check (Chattering, Low voltage, High voltage): Ignition switch ON and time after ignition switch is to ON Battery voltage 600 rpm or more 8 V or more ON 2 seconds or more 8 V or more TYPICAL MALFUNCTION THRHOLDS Camshaft Position Sensor Range Check: Camshaft position sensor signal Camshaft Position/Crankshaft Position Misalignment: Camshaft position and crankshaft position phase Camshaft Position Sensor Range Check (Chattering): Camshaft position sensor voltage Camshaft Position Sensor Range Check (Low voltage): Camshaft position sensor voltage Camshaft Position Sensor Range Check (High voltage): Camshaft position sensor voltage No signal Mis-aligned VVT sensor range check (While starting engine): VVT sensor signal VVT sensor range check (After starting engine): VVT sensor signal Less than 0.3 V, or more than 4.7 V Less than 0.3 V More than 4.7 V No signal No signal VVT sensor range check (Chattering): Less than 0.3 V, or more than 4.7 V VVT sensor range check (Low voltage): Less than 0.3 V
1GR-FE EINE CONTROL SYSTEM SFI SYSTEM 199 VVT sensor range check (High voltage): More than 4.7 V COMPONENT OPERATI RAE 0.3 to 4.7 V WIRI DIAGRAM Refer to P0335 (See page -187). 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 is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction. 1 CHECK ECM TERMINAL VOLTAGE ECM: NE+ NE- VV1+ VV2+ Inspect the ECM using an oscilloscope. (1) While the engine is idling, check the waveform of the ECM connector. VV1+ (E6-19) - VV1- (E6-29) Correct waveform shown VV2+ (E6-18) - VV2- (E6-28) Correct waveform shown NE+ (E6-21) - NE- (E6-20) Correct waveform shown E6 VV2- VV1- REPLACE ECM VV1, VV2 and NE Signal Waveforms NE VV1 VV2 20 ms/div. A114620E05
200 1GR-FE EINE CONTROL SYSTEM SFI SYSTEM 2 CHECK HARNS AND CONNECTOR (VVT SENSOR - ECM) Wire Harness Side: (b) (c) Disconnect the V3 or V4 VVT sensor connector. Disconnect the E6 ECM connector. Measure the resistance. Standard resistance (Check for open) V4 Bank 1 VVT sensor (V4-1) - VV1+ (E6-19) Below 1 Ω V3 Bank 2 ECM: 1 2 3 VVT Sensor VVT sensor (V3-1) - VV2+ (E6-18) VVT sensor (V3 or V4-3) - NE- (E6-20) Standard resistance (Check for short) Below 1 Ω Below 1 Ω E6 VVT sensor (V4-1) or VV1+ (E6-19) - Body ground VVT sensor (V3-1) or VV2+ (E6-18) - Body ground 10 kω or higher 10 kω or higher VVT sensor (V3 or V4-3) or NE- (E6-20) - Body ground 10 kω or higher (d) (e) Reconnect the VVT sensor connector. Reconnect the ECM connector. NE- VV1+ VV2+ A114621E03 REPAIR OR REPLACE HARNS OR CONNECTOR 3 CHECK VVT SENSOR (SENSOR POWER SOURCE) Wire Harness Side: V4 Bank 1 V3 Bank 2 VVT Sensor G038815E05 (b) (c) Disconnect the V3 or V4 VVT sensor connector. Measure the voltage between the terminals of the VVT sensor. Standard voltage 3 - Body ground 4.5 to 5.0 V Reconnect the VVT sensor connector. REPAIR OR REPLACE ECM 4 CHECK SENSOR INSTALLATION (VVT SENSOR) Check the VVT sensor installation. : Sensor is installed correctly. REPAIR OR REPLACE VVT SENSOR
1GR-FE EINE CONTROL SYSTEM SFI SYSTEM 201 5 CHECK CAMSHAFT TIMI GEAR ASSEMBLY (TEETH OF PLATE) Check the teeth of the signal plate. : Sensor plate teeth do not have any cracks or deformation. REPLACE CAMSHAFT TIMI GEAR ASSEMBLY REPLACE ECM