Engine Speed Signal Inspection

COMBINATION METERS


Engine Speed Signal Inspection

Symptom: Tachometer indication is malfunction.
1.CHECK UNIFIED METER AND A/C AMP. INPUT SIGNAL
1. Start the engine and select "METER/M&A" on CONSULT-III.
2. Using "TACHO METER" on "Data Monitor", compare the value of "Data Monitor" to that of tachometer of combination meter.
Is the value in tachometer almost same as the value in the monitor?
OK - GO TO 2.
NG - Replace combination meter. (Perform self-diagnosis of ECM when the value in the monitor indicates 8191.875 rpm. Then repair or replace the malfunction part.)
2.CHECK ECM OUTPUT SIGNAL
1. Select "ENGINE" on CONSULT-III.
2. Using "ENG SPEED" on "Data Monitor", check the CONSULT-III screen when the engine is idling.
3. Select "METER/M&A" on CONSULT-III.
4. Using "TACHO METER" on "Data Monitor", compare the value of "Data Monitor" of the idling speed with that of the "ENG SPEED".
OK or NG
OK - Perform self-diagnosis of ECM. Refer to Consult-III Function (for VQ35HR) or (for VK45DE).
NG - Replace unified meter and A/C amp.