DTC P0335 Crankshaft Position Sensor âAâ Circuit Malfunction
Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because ... During cranking or idling, check between terminals G2 and. NE-, NE ...
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. (2 trip detection logic) P0335
Open or short in crankshaft position sensor circuit. Crankshaft position osition sensor Signal plate (Timing belt guide) Crankshaft timing pulley ECM
No crankshaft position sensor signal to ECM with engine speed 600 rpm or more (2 trip detection logic)
WIRING DIAGRAM
C1 Camshaft Position Sensor
ECM
1 2
18 G2 E7
B W (Shielded)
2
W
1
O
C2 Crankshaft Position Sensor
(Shielded)
W
16 NEE7 17 NE E7
E1
BR EB
A09056
2002 ECHO (RM884U)
Author:
Date:
242
DI-73 DIAGNOSTICS
-
ENGINE
INSPECTION PROCEDURE HINT:
Perform troubleshooting of DTC 335 1st. If notrouble is found, troubleshoot the following mechanical system. 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 ). G2, NE signal waveforms 5V/ Division
G2
Reference: INSPECTION USING OSCILLOSCOPE During cranking or idling, check between terminals G2 and NE-, NE and NE- of the ECM 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
3
-
ENGINE
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.
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When a malfunction code other than code B1100/31 is displayed at the same time, first repair the malfunction indicated by the malfunction code other than code ...Missing:
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