Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm di eg cip0335
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DI-72
DIAGNOSTICS - ENGINE
DI6VA-04
DTC P0335 Crankshaft Position Sensor "A" Circuit
Malfunction
CIRCUIT DESCRIPTION
Crankshaft position sensor (NE signal) consist of a signal plate and pick up coil.
The NE signal plate has 34 teeth and is mounted on the crankshaft. The NE signal sensor generates 34
signals of every engine revolution. The ECM detects the standard crankshaft angle based on the G2 signals,
and the actual crankshaft angle the engine speed by the NE signals.
DTC No. DTC Detecting Condition Trouble Area
No crankshaft position sensor signal to ECM during cranking. S Open or short in crankshaft position sensor circuit.
(2 trip detection logic) S Crankshaft position sensor
osition
P0335 No crankshaft position sensor signal to ECM with engine S Signal plate (Timing belt guide)
speed 600 rpm or more S Crankshaft timing pulley
(2 trip detection logic) S ECM
WIRING DIAGRAM
C1
Camshaft Position Sensor ECM
18
1 B G2
E7
2 W
(Shielded)
16
2 W W NE-
E7
17
1 O NE
E7 E1
C2 (Shielded) BR
Crankshaft Position Sensor EB
A09056
2002 ECHO (RM884U)
Author : Date : 242
DI-73
DIAGNOSTICS - ENGINE
INSPECTION PROCEDURE
HINT:
S Perform troubleshooting of DTC 335 1st. If notrouble is found, troubleshoot the following mechanical
system.
S Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the malfunction is detected, when troubleshooting it is useful for
determining whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel
ratio lean or rich, etc. at the time of the malfunction.
1 Check resistance of crankshaft position sensor (See page IG-1 ).
Reference: INSPECTION USING OSCILLOSCOPE
G2, NE signal waveforms
During cranking or idling, check between terminals G2 and
NE-, NE and NE- of the ECM
5V/
G2 Division HINT:
The correct waveforms are as shown.
NE
20 m sec./Division (Idling) A03961
NG Replace crankshaft position sensor.
OK
2 Check for open and short in harness and connector between ECM and
crankshaft position sensor (See page IN-29 ).
NG Repair or replace harness or connector.
OK
2002 ECHO (RM884U)
Author : Date : 243
DI-74
DIAGNOSTICS - ENGINE
3 Inspect crankshaft position sensor installation and teeth of crankshaft timing
pulley (See page IG-1 1, EM-13 ).
NG Tighten the sensor.
Replace crankshaft timing pulley.
OK
Check and replace ECM (See page IN-29 ).
2002 ECHO (RM884U)
Author : Date : 244
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