Inspection steps
CAUTION:
Before performing inspections according to this flow chart, check that no abnormal condition is present in the engine. (Refer to
HOW TO TROUBLESHOOT
)
- Reading diagnostic codes
- Using SSM4, check if any diagnostic code related to CAN communication system is output. (Refer to BASIC INSPECTION )
RESULT DESCRIPTIONResult Go to Diagnostic code is not output A Diagnostic code is output B A: Go to next step
B: To CAN communication system (Refer to HOW TO TROUBLESHOOT )
- Implementation of SSM4 active test (tachometer)
- Using SSM4, display the [Active Test] screen according to the screen and perform check. (Refer to DATA MONITOR/ACTIVE TEST )
SSM4 screen: [Each System] →[Combination Meter] →[Active Test]
Item name Contents of testing Check item [Tacho meter] Engine speed indication changeover 7000, 6000, 5000, 4000, 3000, 2000, 1000, 0 (r/min) NOTE: When performing an [Active Test], check if the actual meter reading is within the allowable range of meter reading (Refer to METER & GAUGE SYSTEM ).RESULT DESCRIPTIONResult Go to Each engine speed specified by [Active Test] can be displayed smoothly A Each engine speed specified by [Active Test] can not be displayed smoothly B A: Go to next step
B: Replacement of the combination meter ASSY (Refer to REMOVAL )
- Reading of SSM4 data (engine speed)
- On the SSM4, navigate to the [Data monitor] display, and check the computer data. (Refer to
DATA MONITOR/ACTIVE TEST )NOTE: Check the tachometer and the reference value of [Data monitor].
SSM4 screen: [Each System] →[Combination Meter] →[Data monitor]
Item name [Symbol] Description/display range Normal value Remarks [Engine Speed]
[Tacho Meter]Engine speed input
Display range: 0 to 12750[r/min]Engine running state
Roughly synchronized with engine speed- RESULT DESCRIPTIONResult Go to The reference value of [Data monitor] almost equals to the tachometer A The reference value of [Data monitor] differs from the tachometer B A: Go to next step
B: Replacement of the combination meter ASSY (Refer to REMOVAL )
- On the SSM4, navigate to the [Data monitor] display, and check the computer data. (Refer to
DATA MONITOR/ACTIVE TEST )
- Reading the diagnostic code (EFI system)
- Using SSM4, check if any diagnostic code related to the EFI system is output. (Refer to CHECKING/CLEARING DTC )
RESULT DESCRIPTIONResult Go to Diagnostic code is not output A Diagnostic code is output B A: Go to next step
B: To EFI system (Refer to HOW TO TROUBLESHOOT )
- Reading of SSM4 data (engine speed)
- Using the SSM4, follow the screen display to bring up and check the [Data monitor]. (Refer to
DATA MONITOR/ACTIVE TEST
)NOTE: Check the tachometer and the reference value of [Data monitor].
SSM4 screen: [Each System] →[Engine Control System] →[Data monitor]
Item name [Symbol] Description/display range Normal value Remarks [Engine Speed] [Engine Spd] Indicates the engine speed
Display range: 0 to 16383.8[r/min]0 r/min Engine stop (IG ON) NE signal (NE sensor) No significant fluctuation When engine is rotating at a constant speed RESULT DESCRIPTIONResult Go to The reference value of [Data monitor] almost equals to the tachometer A The reference value of [Data monitor] differs from the tachometer B A: Go to next step
B: To EFI system (Refer to HOW TO TROUBLESHOOT )
- Using the SSM4, follow the screen display to bring up and check the [Data monitor]. (Refer to
DATA MONITOR/ACTIVE TEST
)
- Replacement of combination meter ASSY
- Replace with a new or normally functioning combination meter ASSY (Refer to REMOVAL ) and check the operation of the tachometer.
RESULT DESCRIPTIONResult Go to Operates normally A Operates abnormally B A: Go to next step
B: Replacement of the engine control computer (Refer to REMOVAL )
Complete (Internal fault of the combination meter ASSY)