No spark

Tiny
ROBERTDIANNA97
  • MEMBER
  • 1999 LEXUS RX 300
  • 3.0L
  • V6
  • TURBO
  • 2WD
  • AUTOMATIC
  • 148,000 MILES
No spark from coils, no rpm on rpm gauge. Had multiple misfire code and -40 on coolant temperature sensor with code.
Monday, September 28th, 2020 AT 12:03 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,131 POSTS
Hi,

If there is no RPM signal, the first thing I would check is the crankshaft position sensor. Take a look through this link:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Here are directions specific to testing the one on your vehicle. The attached pics correlate with the directions.

_______________________________

1999 Lexus Truck RX 300 FWD V6-3.0L (1MZ-FE)
Component Inspection
Vehicle Powertrain Management Sensors and Switches - Powertrain Management Sensors and Switches - Computers and Control Systems Crankshaft Position Sensor Testing and Inspection Component Tests and General Diagnostics Component Inspection
COMPONENT INSPECTION
NOTE: "Cold" and "Hot" in these sentences express the temperature of the sensor itself. "Cold" is from - 10°C (14° F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).

INSPECT CRANKSHAFT POSITION SENSOR RESISTANCE
Using an ohmmeter, measure the resistance between terminals.
Resistance:

pic 1

pic 2

pic 3

RESISTANCE

If the resistance is not as specified, replace the crankshaft position sensor.

________________________

Let me know what you find. Also, let me know the codes that were pulled when it was checked.

Take care,
Joe

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Monday, September 28th, 2020 AT 5:05 PM

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