ECD SYSTEM, Diagnostic DTC:P0336, P0337, P1669, P1672

DTC Code	DTC Name
P0336	Crankshaft Position Sensor Range / Performance
P0337	Crankshaft Position Sensor "A" Circuit Low Input
P1669	Engine Speed not Plausible
P1672	Supervision of Maximum Engine Speed

DESCRIPTION

The crankshaft position sensor system consists of a crankshaft timing pulley and hall type sensor. The crankshaft timing pulley has teeth. The pick up coil is made of an iron core and magnet. The crankshaft timing pulley rotates, and a pulse signal is created as each tooth passes through the pickup coil. The target is composed of 60 (58+2) magnetic pole pairs distributed on the periphery of which two poles are absent to mark the crank position.

Based on the signal, the ECM calculates the crankshaft position and engine RPM. Using these calculations, the common rail system is controlled.

DTC No.	DTC Detection Condition	Trouble Area	Possible to Detect
DTC No.	DTC Detection Condition	Trouble Area	Ignition Switch	Engine Run
P0336	Signal plausibility. Position miss long tooth or over engine speed (over 5,400 rpm) or over acceleration for 6 engine revolutions	Crankshaft position sensor Crankshaft position sensor circuit 58-teeth crankshaft timing pulley ECM	-	ON
P0337	No signal, open circuit or short circuit for 6 engine revolutions.	Crankshaft position sensor Crankshaft position sensor circuit ECM	-	ON
P1669	Engine speed not plausibility for 0.48 sec. or more.	Crankshaft position sensor Crankshaft position sensor circuit 58-teeth crankshaft timing pulley ECM	-	ON
P1672	Supervision of maximum engine speed safety not plausibility for 0.48 sec. or more.	Crankshaft position sensor Crankshaft position sensor circuit 58-teeth crankshaft timing pulley ECM	-	-

Reference:

The waveform between terminals NE+ and NE- of the ECM connectors with the engine idling.

FAIL-SAFE

DTC No.	Fail-safe Operation	Fail-safe Deactivation Condition
P0336	Stop the injection.	-
P0337	Stop the injection.	-
P1669	Limits the engine speed (2,000 rpm).	Ignition switch OFF
P1672	Cut-off injector piezo power stage. Engine stall.	Ignition switch OFF

WIRING DIAGRAM

INSPECTION PROCEDURE

Tech Tips

When DTC P0336 or P0337 is detected, check the engine speed by selecting the following menu items on the intelligent tester: Powertrain / Engine and ECT / Data List / Engine Spd.
If the ECM is replaced, variant coding (variant coding indicates the presence of vehicle accessory items, A/C, etc.) should always be performed Click here.
Before removing the ECM and the peripheral parts, wait at least 3 minute after turning the ignition switch off (If the cooling fan is operating, remove the ECM and the peripheral parts after the fan stops.).

PROCEDURE

READ VALUE OF INTELLIGENT TESTER (ENGINE SPEED)
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position and turn the intelligent tester on.
3. Select the following menu items: Powertrain / Engine and ECT / Engine Spd.
4. Read the value.
  
  OK
  
  The value is the same as the actual engine speed.
  
  Tech Tips
  
  If the crankshaft position sensor malfunctions, the engine usually cannot be started.
NG
INSPECT ECM (VOLTAGE) Click here

OK

CHECK FOR INTERMITTENT PROBLEMS

OK
The value is the same as the actual engine speed.

INSPECT ECM (VOLTAGE)

Disconnect the B42 crankshaft position sensor connector.
Turn the ignition switch to the ON position.

Measure the voltage according to the value(s) in the table below.

Standard voltage

Tester Connection	Specified Condition
VNE (B42-1) - Body ground	4.7 to 5.3 V

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Click here

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

Disconnect the B53 ECM connector.
Disconnect the B42 crankshaft position sensor connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance

Check for open

Tester Connection	Specified Condition
NE+ (B53-19) - NE+ (B42-2)	Below 1 Ω
NE- (B53-20) - NE- (B42-3)	Below 1 Ω

Check for short

Tester Connection	Specified Condition
NE+ (B53-19) or NE (B42-2) - Body ground	10 kΩ or higher
NE- (B53-20) or NE- (B42-3) - Body ground	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)
1. Check the installation condition of the crankshaft position sensor.
  
  OK
  
  The sensor is installed correctly.
NG
REPAIR OR REPLACE CRANKSHAFT POSITION SENSOR

OK
CHECK SENSOR AIRGAP (CRANKSHAFT POSITION SENSOR)
1. Measure the crankshaft position sensor airgap.
  
  Standard
  
  0.5 to 1.5 mm (0.020 to 0.059 in.)
NG
REPAIR OR REPLACE CRANKSHAFT POSITION SENSOR

OK
INSPECT CRANKSHAFT TIMING PULLEY
1. Check the crankshaft timing pulley.
  
  OK
  
  The crankshaft timing pulley does not have any cracks or deformation.
NG
REPLACE CRANKSHAFT TIMING PULLEY

OK
CHECK POWER SOURCE CIRCUIT
1. Check that the battery voltage, ECM power source voltage, and the ground condition of the ECM are normal.
  
  OK
  
  The battery voltage, ECM power source voltage, and the ground condition of the ECM are normal.
  
  Tech Tips
  
  Make sure that the battery is not discharged during the inspection.
NG
REPAIR POWER SOURCE CIRCUIT

OK
REPLACE CRANKSHAFT POSITION SENSOR

NEXT

OK
The sensor is installed correctly.

Standard
0.5 to 1.5 mm (0.020 to 0.059 in.)

OK
The crankshaft timing pulley does not have any cracks or deformation.

OK
The battery voltage, ECM power source voltage, and the ground condition of the ECM are normal.

CHECK IF DTC RECURS (P0336 AND/OR P0337)

Connect the intelligent tester to the DLC3.
Clear the DTC Click here.
Start the engine and drive the vehicle for 20 minutes.
Turn the intelligent tester on.
Select the following menu items: Powertrain / Engine and ECT / DTC.

Read the DTCs displayed on the intelligent tester.

Result

Display (DTC output)	Proceed To
No output	A
P0336 and/or P0337	B

REPLACE ECM

END