Active Test
ACTIVE TESTHINT: Performing an ACTIVE TEST enables components including the relays, VSV (Vacuum Switching Valve), and actuators, to be operated without removing any parts. The ACTIVE TEST can be performed with an intelligent tester. Performing an ACTIVE TEST as the first step of troubleshooting is one method of shortening diagnostic time.
DATA LIST can be displayed during ACTIVE TESTs.
a. Connect an intelligent tester to the DLC3.
b. Turn the ignition switch ON.
c. Turn the tester ON.
d. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST.
e. Perform the ACTIVE TEST by referring to the table.
In this ACTIVE TEST, the fuel and ignition of all cylinders are cut, and cranking occurs for approximately 10 seconds. Then, each cylinder measures the engine rpm. If a cylinder's engine rpm is higher than the others, that cylinder's compression pressure is compared to the others, and is determined whether it is low or not.
1. Warm up the engine.
2. Turn the ignition switch off.
3. Connect the intelligent tester to the DLC3.
4. Turn the ignition switch ON and turn the intelligent tester on.
5. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / COMPRESS CHECK.
HINT: If the results are not displayed normally, select the display items from the DATA LIST before performing the ACTIVE TEST. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / USER DATA / ENG SPEED #1, ENG SPEED #2, ENG SPEED #3, ENG SPEED #4, ENG SPEED #5, ENG SPEED #6 (Press the YES button to change the ENG SPEED #1 to #6) and then press the ENTER button.
6. While the engine is not running, press the RIGHT or LEFT button to change the COMPRESS CHECK to ON.
HINT: After performing the procedure, the ACTIVE TEST's COMPRESS CHECK will start. Fuel injection for all cylinders is prohibited, and each cylinder's engine rpm measurement will enter stand by mode.
7. Fully open the throttle.
8. Crank the engine for about 10 seconds.
9. Monitor the engine speed (ENG SPEED #1 to #6) displayed on the tester.
HINT: At first, the tester's display will show each cylinder's engine rpm measurement to be extremely high. After approximately 10 seconds of engine cranking, each cylinder's engine rpm measurement will change to the actual engine rpm.
NOTE:
- After the ACTIVE TEST's COMPRESS CHECK is turned ON, it will automatically turn off after 255 seconds.
- When the COMPRESS CHECK test is OFF and the engine is cranked, the engine will start.
- If the COMPRESS CHECK test needs to be performed after it is turned ON and performed once, press EXIT to return to the ACTIVE TEST menu screen. Then perform the COMPRESS CHECK test again.
- Use a fully-charged battery.