Diagnosis (Check Mode)
INSPECT DIAGNOSIS (Check Mode)HINT:
Hand-held tester only:
Compared to the normal mode, the check mode has an increased sensitivity to detect malfunctions.
Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the check mode.
a. Check the DTC
1. Initial conditions
- Battery positive voltage 11 V or more.
- Throttle valve fully closed.
- Transmission in "P" or "N" position.
- Air conditioning switched OFF.
2. Turn ignition switch OFF.
3. Prepare the hand-held tester.
4. Connect the hand-held tester to the DLC3 under the instrument panel lower pad.
If there is no DTC in normal mode, check the 1st trip DTC using Continuous Test Results function (Mode 7 for SAE J1979) on the OBD II scan tool or the hand-held tester.
5. Turn the ignition switch ON and switch the hand- held tester ON.
6. Switch the hand-held tester normal mode to check mode (Check that the MIL flashes.).
NOTE: If the hand-held tester switches the ECM from normal mode to check mode or vise-versa, or if the ignition switch is turned from ON to ACC or LOCK during check mode, the DTCs and freezed frame data will be erased.
7. Start the engine (The MIL goes out after the engine start.).
8. Simulate the conditions of the malfunction described by the customer.
NOTE: Leave the ignition switch ON until you have checked the DTC, etc.
9. After simulating the malfunction conditions, use the hand-held tester diagnosis selector to check the DTCs and freezed frame data, etc.
HINT: Take care not to turn the ignition switch OFF Turning the ignition switch OFF switches the diagnosis system from check mode to normal mode. So all DTCs, etc. are erased.
10. After checking the DTC, inspect the applicable circuit.
b. Clear the DTC.
1. The actions will erase the DTCs and freeze frame data.
- Operating the hand-held tester to erase the codes. (See the hand-held tester's instruction book for operating instructions.)
- Disconnecting the battery terminal or the EFI and ECTS fuses more than 30 second.