Component Specification Supplementary Information, Engine Control Module (ECM), B8444S

Component specification supplementary information, Engine control module (ECM)

Engine speed sensor, crankshaft

General





Type
Inductive sensor with permanent magnet. Output voltage is proportional to the magnet flow's change through the sensor. Higher rpm = higher voltage.

Characteristic
Output voltage 5 - 16V at 650 rpm.
Output voltage ≥ 100V at 7000 rpm.

Other information
Certain markets only.

Terminal











Check
Prerequisites (unless otherwise specified):
- Breakout box connected.
- Sensor connected.
- Engine running.





Check 1
Engine rpm sensor:
Measure alternating voltage between #A6 and #A30. The value should be:
approximately 5 - 16V at idle (650 rpm).
U ≥ 100V at 7000 rpm.

Note! The voltage reaches its highest value immediately after the gap in the flywheel.

Note! The control module interprets that the curve is symmetric. No check of voltage level.

Check 2
Engine rpm sensor:
Measure resistance between #A6 and #A30. The value should be:
125.5ohms ± 17ohms at +20 °C.

Camshaft sensor




Magnet-resistive sensor (hall sensor). The sensor is supplied with 5V voltage and is grounded through the control module.

Characteristic
When the camshaft rotates, a pulsed voltage signal is generated. The signal is 5V when tooth on the camshaft passes the sensor and 0V for gap.

Terminal










Check
Prerequisites (unless otherwise specified):
- Breakout box connected.
- Sensor connected.
- Engine running.




Camshaft sensor:
Measure voltage between #A7 and respective signal output on the camshaft sensor.
The value should be:
approximately 0V gap against sensor.
approximately 5V tooth against sensor

Note! The signal's asymmetrical wave shape depends on the camshaft's teeth.