Tachometer Malfunction: Procedure
- CHECK CAN COMMUNICATION SYSTEM
- Check for the DTC. Refer to DTC CHECK / CLEAR
.RESULT:
Result Proceed to CAN communication system DTC is not output A CAN communication system DTC is output B
B → See step 7
A: Go to next step
- Check for the DTC. Refer to DTC CHECK / CLEAR
.
- PERFORM ACTIVE TEST USING TECHSTREAM (TACHOMETER)
- Operate the Techstream according to the display and select "Active Test".COMBINATION METER:
Tester Display Test Part Control Range Diagnostic Note Tachometer Operation Tachometer 0, 1000, 2000, 3000, 4000, 5000, 6000, 7000 Confirm that vehicle is stopped and engine is idling OK
Needle indication is normal.
NG → See step 8
OK: Go to next step
- Operate the Techstream according to the display and select "Active Test".
- READ VALUE USING TECHSTREAM (ENGINE SPEED)
- Operate the Techstream according to the display and select "Data List".COMBINATION METER:
Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Rpm Engine speed / Min.: 0, Max.: 12750 Idling: 700 to 800 Unit: rpm OK
Engine speed displayed on the Techstream is almost the same as actual engine speed.
NG → See step 4
OK → See step 9
- Operate the Techstream according to the display and select "Data List".
- READ VALUE USING TECHSTREAM (ENGINE SPEED)
- Operate the Techstream according to the display and select "Data List".ENGINE:
Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Speed Engine speed / Min.: 0, Max.: 16383.75 Idling: 700 to 800 Unit: rpm OK
Engine speed displayed on the Techstream is almost the same as the actual engine speed.
NG → See step 10
OK: Go to next step
- Operate the Techstream according to the display and select "Data List".
- REPLACE NO. 1 METER ECU
- Temporarily replace the combination meter with a new one. Refer to DISASSEMBLY .
NEXT: Go to next step
- CHECK NO. 1 METER ECU
- Check that the operation of the tachometer returns to normal. Refer to OPERATION CHECK
.
OK
Operation of tachometer returns to normal.
NG → See step 11
OK → END (COMBINATION METER IS DEFECTIVE)
- Check that the operation of the tachometer returns to normal. Refer to OPERATION CHECK
.
- Go to CAN COMMUNICATION SYSTEM. Refer to CAN COMMUNICATION SYSTEM
- REPLACE NO. 1 METER ECU. Refer to DISASSEMBLY
- REPLACE NO. 1 METER ECU. Refer to DISASSEMBLY
- Go to SFI SYSTEM. Refer to SFI SYSTEM
- REPLACE ECM. Refer to REMOVAL