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Home >> Lexus >> 2004 >> IS 300 L6-3.0L (2JZ-GE) >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Testing and Inspection >> Scan Tool Testing and Procedures >> Diagnosis (Check Mode)

Diagnosis (Check Mode)

INSPECT DIAGNOSIS (CHECK MODE)

HINT: Hand-held tester only: Compared to the normal mode, the check mode has high sensing ability to detect malfunctions. Furthermore, the same diagnostic items which are detected in Normal mode can also be detected in Check mode.

a. Check the DTC.
1. Check the initial conditions.
- Battery voltage 11 V or more
- Throttle valve fully closed
- Transmission in P position
- Air conditioning switched off

2. Turn the ignition switch off.
3. Prepare a hand-held tester.




4. Connect the hand-held tester to DLC3 at the lower side of the instrument panel.
5. Turn the ignition switch ON and switch the hand-held tester ON.




6. Switch the hand-held tester from Normal mode to Check mode (Check that the MIL flashes).
7. Start the engine (MIL goes out after the engine starts).
8. Simulate the conditions of the malfunction described by the customer.

NOTE: Leave the ignition switch ON until you have checked the DTCs, etc.

9. After simulating the malfunction conditions, use the hand-held tester diagnosis selector to check the DTCs and freeze frame data, etc.

HINT: Be sure not to turn the ignition switch off as turning it off switches the diagnosis system from Check mode to Normal mode, which erases all DTCs, etc.

10. After checking the DTC, inspect the applicable circuit.


b. When using the OBD II scan tool or hand-held tester:

Clearing the DTCs.
1. Connect the OBD II scan tool or hand-held tester to the DLC3.
2. Turn the ignition switch to the ON position and push the OBD II scan tool or the hand-held tester main switch on.
3. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR CODES [YES] button".

HINT: When operating the OBD II scan tool (complying with SAE J1978) or hand-held tester to erase the codes, the DTCs and freeze frame data will be erased. (See the OBD II scan tool's instruction book for operating instructions.)

c. When not using the OBD II scan tool or hand-held tester:

Clearing the DTCs.
Disconnect the battery terminal or remove the EFI and ETCS fuses from the engine room J/B for 60 seconds or more. But if you disconnect the battery terminal, you should do the "INITIALIZE" procedure.
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