WATER SPRINKLING METHOD
If malfunction occurs only under high humidity or rainy/snowy weather, perform the following steps
| CAUTION | Indirectly change the temperature and humidity by spraying water onto the front of the radiator. If a vehicle is subject to water leakage, the leakage may damage the control module. When testing a vehicle with a water leakage problem, special caution must be used. |
Scheme 528
- Connect the WDS or equivalent to the DLC-2 if you are inspecting sensors or switches.
- Turn the ignition switch to the ON position (Engine off).
- Access PIDs for sensor or switch if you are inspecting sensors or switches.
- If you are inspecting the switch, turn it on manually.
- Spray water onto the vehicle or run it through a car wash. If PID value is unstable or malfunction occurs, repair or replace part if necessary.
FINDING IRREGULAR SIGNALS
While referring to ON-BOARD DIAGNOSTIC TEST , use the PID/DATA monitor and record function to inspect the input signal system relating to the problem.
- Start the engine and idle the vehicle. You can assume that any signals that are out of specification by a wide margin are irregular.
- When recreating the problem, any sudden change in monitor input signals that is not intentionally created by the driver can be determined as irregular.
LOCATING THE SOURCE OF UNUSUAL SIGNALS
| CAUTION | Compare the WDS or equivalent monitor voltage with the measurement voltage using the digital measurement system function. If you use another tester, misreading may occur. When measuring voltage, attach the tester GND to the GND of the PCM that is being tested, or to the engine itself. If this is not performed, the measured voltage and actual voltage may differ. After connecting the pin to a waterproof coupler, confirming continuity and measuring the voltage, inspect the waterproof connector for cracks. If there are any, use sealant to fix them. Failure to do this may result in deterioration of the wiring harness or terminal from water damage, leading to problems with the vehicle. |
Scheme 529
WHEN IDLING CAN BE CONTINUED
- Disconnect Oil Control Valve (OCV) connector.
- Warm up the engine and idle it.
- Apply battery voltage to the Oil Control Valve (OCV) and verify that the engine idles roughly or stalls. If the engine idles roughly or stalls, inspect the timing belt component (valve timing deviation). If the engine does not idle roughly or stalls, go to the next step.
- Remove the oil control valve (OCV) and perform spool valve operation inspection. (See OIL CONTROL VALVE (OCV) INSPECTION [L3] .) If not as specified, inspect the following: Oil Control Valve (OCV). Harnesses and connectors between Oil Control Valve (OCV) and PCM open or short. If as specified, inspect the following hydraulic passages for clogging or leakage or both: Oil pressure switch - Oil Control Valve (OCV). Oil Control Valve (OCV) - camshaft. Camshaft internal passage.
- If they are normal, replace the camshaft pulley (with built-in variable valve timing actuator).