A11663
VV1, VV2 and NE Signal Waveforms
2 V
/Division
20 msec./Division (Idling)
VV1
NE
VV2
GND
GND
GND
DI-66
-
DIAGNOSTICS
ENGINE
220
Author:
Date:
2001 SIENNA (RM787U)
1
Check resistance of crankshaft position sensor (See page
Reference INSPECTION USING OSCILLOSCOPE
During cranking or idling, check between terminals G22+ and
NE-, NE and NE- of the ECM connector.
HINT:
The correct waveforms are as shown.
NG
Replace crankshaft position sensor.
OK
2
Check for open and short in harness and connector between ECM and
crankshaft position sensor (See page
NG
Repair or replace harness or connector.
OK
3
Inspect sensor installation and teeth of crankshaft timing pulley.
NG
Tighten the sensor.
Replace crankshaft timing pulley.
OK
Check and replace ECM
(See page
).
