Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.
Check the engine speed. The engine speed can be checked by using Techstream. To check, follow the operation below:
1. Connect Techstream to the DLC3.
2. Start the engine.
3. Turn the tester on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed..
  The engine speed may be indicated as zero despite the engine revolving normally. This is caused by a lack of NE signals from the crankshaft position (CKP) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed, if the CKP sensor output voltage is insufficient.
Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See FREEZE FRAME DATA ).

INSPECT CRANKSHAFT POSITION SENSOR

Disconnect the E9 crankshaft position (CKP) sensor connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 - 2	Cold	1,630 to 2,740 Ω
1 - 2	Hot	2,065 to 3,225 Ω

Fig 1: Identifying Terminals Of E9 Crankshaft Position Sensor Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F).

Reconnect the CKP sensor connector.

NG: REPLACE CRANKSHAFT POSITION SENSOR

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

Disconnect the E9 CKP sensor connector.
Disconnect the E3 ECM connector.

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

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
E9-1 - NE+ (E3-32)	Below 1 Ω
E9-2-NE- (E3-31)	Below 1 Ω

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
E9-1 or NE+ (E3-32) - Body ground	10 kΩ or higher
E9-2 or NE- (E3-31) - Body ground	10 kΩ or higher

Reconnect the ECM connector.
Reconnect the CKP sensor connector.

Fig 2: Identifying Terminals Of E9 CKP Sensor And E3 ECM Connectors

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.

CHECK CRANK POSITION SENSOR (SENSOR INSTALLATION)
1. Check the CKP sensor installation.
  OK:
  
  Sensor is installed correctly.
  
  Fig 3: Checking CKP Sensor Installation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE CRANK POSITION SENSOR

OK: Go to next step.
CHECK CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE)
1. Check the teeth of the sensor plate.
  OK:
  
  Sensor plate does not have any cracks or deformation.
NG: REPLACE CRANKSHAFT POSITION SENSOR PLATE

OK: REPLACE ECM