Active Test
ACTIVE TESTHINT: Using the intelligent tester or Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.
a. Warm up the engine.
b. Turn the ignition switch OFF.
c. Connect the intelligent tester or Techstream to the DLC3.
d. Turn the ignition switch ON.
e. Turn the tester ON.
f. Enter the following menus:
1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST.
2. Techstream - Select: Powertrain / Engine and ECT / Active Test.
g. According to the display on the tester, perform the Active Test.
Part 1:
Part 2:
Intelligent tester
a. Stop the engine and turn the ignition switch ON to turn FUEL CUT#1 (to #8) ON
b. Start the engine.
HINT: *2: When cranking the engine, each cylinder measures the engine rpm.
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 other, that cylinder's compression pressure is compared to the other, 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. Enter the following menus: 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, ENG SPEED #7, ENG SPEED #8 (Press the YES button to change the ENG SPEED #1 to #8) 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 standby mode.
7. Crank the engine for about 10 seconds.
8. Monitor the engine speed (ENG SPEED #1 to #8) 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.
Part 1:
Part 2:
Part 3:
Techstream
a. Stop the engine and turn the ignition switch ON to turn Control the Cylinder#1 Fuel Cut (to Control the Cylinder#8 Fuel Cut) ON.
b. Start the engine.
HINT: *2: When cranking the engine, each cylinder measures the engine rpm. In this Active Test, the fuel and ignition of all cylinders is 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 other, that cylinder's compression pressure is compared to the other, and whether or not the compression pressure is low can be determined.
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. Enter the following menus: Powertrain / Engine / Active Test / Check the Cylinder Compression.
HINT: To display the entire Data List, press the pull down menu button next to Primary. Then select Compression.
6. While the engine is not running, press the RIGHT or LEFT button to change the Check the Cylinder Compression to ON.
HINT: After performing the procedure, the Active Test's Check the Cylinder Compression will start. Fuel injection for all cylinders is prohibited, and each cylinder's engine rpm measurement will enter standby.
7. Fully open the throttle.
8. Crank the engine for about 10 seconds.
9. Monitor the engine speed (Engine Speed of Cyl #1 to #8) 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:
- When the Check the Cylinder Compression test is OFF and the engine is cranked, the engine will start.
- If the Check the Cylinder Compression 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 Check the Cylinder Compression test again.
- Use a fully-charged battery.