Inspection Procedure
- READ VALUE USING TECHSTREAM (ENGINE CONDITION)
- Use the Data List to check if the engine condition is functioning properly.
Main Body
ITEM RANGE REFERENCETester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Condition Engine condition/Run or Stop Run: Engine running
Stop: Engine stopped- OK: When the engine is running, Run is displayed on the Techstream.
NG: REPLACE MAIN BODY ECU
OK: Go to next step.
- Use the Data List to check if the engine condition is functioning properly.
- CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)
- Disconnect the L11 main body ECU connector.
- Disconnect the A14 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
RESISTANCE REFERENCETester Connection Condition Specified Condition L11-8 (TACH) - A14-15 (TACH) Always Below 1 Ω L11-8 (TACH) or A14-15 (TACH) - Body ground Always 10 kΩ or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step.
- CHECK MAIN BODY ECU (OPERATION)
- Temporarily replace the main body ECU with a new or normally functioning one.
- Check that the engine starts normally.
OK: Engine starts normally.
NG: GO TO SFI SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )
OK: END (MAIN BODY ECU IS FAULTY)