DESCRIPTION
The Variable Valve Timing (VVT) system includes the ECM, Oil Control Valve (OCV) and VVT controller.
The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure supplied to the VVT controller. Camshaft timing control is performed according to engine operating conditions such as intake air volume, throttle valve position and engine coolant temperature.
The ECM controls the OCV, based on the signals transmitted by several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the OCV. As a result, the relative positions of the camshaft and crankshaft are optimized, the engine torque and fuel economy improves, and the exhaust emissions decrease under overall driving conditions. The ECM detects the actual intake valve timing using signals from the camshaft and crankshaft position sensors, and performs feedback control.
This is how the target intake valve timing is verified by the ECM.
MONITOR DESCRIPTION
After the ECM sends the "target" duty-cycle signal to the OCV, the ECM monitors the OCV current to establish an "actual" duty-cycle. The ECM detects a malfunction and sets a DTC when the actual dutycycle ratio varies from the target duty-cycle ratio.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
1 PERFORM ACTIVE TEST BY CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV)
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine and turn the tester on.
(c) Warm up the engine.
(d) On the tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1 or VVT CTRL B2.
(e) Check the engine speed while operating the Oil Control Valve (OCV) using the tester.
2 INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
(a) Disconnect the C23 or C24 camshaft timing oil control valve (OCV) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance
(c) Reconnect the OCV connector.
3 CHECK HARNESS AND CONNECTOR (OCV - ECM)
(a) Disconnect the C23 or C24 camshaft timing oil control valve (OCV) connector.
(b) Disconnect the E11 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open)
Standard resistance (Check for short)
(d) Reconnect the OCV connector.
(e) Reconnect the ECM connector.
REPLACE ECM (See page ES-498)
Short in Front Passenger Side Squib 2nd Step
Circuit
DTC B1185/57 Short in Front Passenger Side Squib 2nd Step
Circuit
DESCRIPTION
The front passenger side squib 2nd step circuit consists of the center airbag
sensor assembly and the
front passenger airbag assembly.
The circuit instructs the SRS to deploy when deployment conditions are met.
...
Reassembly
1. INSTALL REAR DIFFERENTIAL PINION SHAFT
(a) Install the 2 thrust washers to the 2 side gears.
(b) Install the 2 side gears, 2 differential pinion gears, 2
differential pinion thrust washers and differential
pinion shaft to the differential case.
HINT:
Align the holes of the differentia ...
2Gr-fe emission control
SST
RECOMMENDED TOOLS
EQUIPMENT
SSM
2GR-FE INTAKE
EQUIPMENT
PREPARATION 2GR-FE EXHAUST
EQUIPMENT
...