4.
Check for PCSV signal at idle.
caution
The data shown above is only for reference and there may be a little difference actually.
This is the inspection procedure to determine whether it is present DTC or memoried one by monitoring the current signal or by using the function of oscilloscope with Hi-scan pro.
Connect scan tool to DLC connector.
IG KEY : ON
Start engine and warm up to operating temperature.
Check for PCSV signal at idle.
The data shown above is only for reference and there may be a little difference actually.
Service standard
Idle : 0 %
1000~3000 rpm : 1.5 ~ 35 %
Service standard
Idle : 0 %
1000~3000 rpm : 1.5 ~ 35 %
This inspection procedure is recommended when service data with scan tool in not enough.
Start engine and warm up to operating temperature.
Probe(+) : PCSV harness connector NO2.
Probe(-) : Chassis ground.
This is waveform measured at terminal 2 of PCSV under no-load,1500 RPM.
The voltage at point ① is 14 V.
Possible cause:No power supply or open in PCSV.
Point ② is a surge voltage when power TR is off and about 45 V.
Periode ③ is the duration when PCSV operates and usually operating duty value is about 15 % in 2000RPM.
Periode ④ is duty per 1Hz and ON-OFF ratio of TR in ECM.
This is waveform measured at terminal 2 of PCSV under no-load,1500 RPM.
The voltage at point ① is 14 V.
Possible cause:No power supply or open in PCSV.
Point ② is a surge voltage when power TR is off and about 45 V.
Periode ③ is the duration when PCSV operates and usually operating duty value is about 15 % in 2000RPM.
Periode ④ is duty per 1Hz and ON-OFF ratio of TR in ECM.
If the PCSV’s waveform shows simirally with that of figure above,it is likely to be normal PCSV.
In case there is no symptom and wrong data but DTC is shown
The problem may be intermittent so slightly shake the connector and harness vertically and horizontally to check if there is any data changes
If the data changes normally, the problem was intermittent so erase DTC and verify the same DTC reoccure.
Go to "Terminal and Connector inspection" procedure.
In case there is symptom and wrong data with DTC
Check open,short or connector’s connection for PCSV.
Check the deterioration of PCSV performance.
Go to "Signal circuit inspection" procedure.
