Cojali Jaltest SST Manual del usuario - Página 8

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· PASSIVE speed sensor:

In this mode, the speed sensor is disconnected from the ECU and connected to the

Jaltest SST device to be able to check it in isolation. By turning the component whose

sensor the user wants to check, they can determine if the sensor generates a correct

signal. For example, by manually turning a vehicle wheel with speed sensor.

Disconnect the speed sensor from the vehicle and connect it to the Jaltest SST

device through multipins according to the

section.

Turn on the device and go into

selection button of the mode (1) according to the presses described in the

table

on page 6. The

that may appear.

Turn the component whose sensor you want to check.

Signal check: When the wheel is turning at fixed speed, the status LEDs of the

signal must flash sequentially and constantly.

Error check:

ٚ The status LED of the signal flash inconsistently: the sensor does not detect a

consistent turn signal.

ٚ The

open circuit error

ٚ The

short circuit error

supply has occurred during the execution of the test.

ٚ The

power supply error

(simulation).

Note: It is possible to repeat the test with just a short press of the selection button of the Mode. The

device performs an error reset and starts the test again.

2.2 SIMULATION MODE

Important!

Jaltest SST cannot operate as a substitute for the vehicle speed sensor

so, in some cases, it is normal that the ECU has present errors concerning the

disconnected component.

ACTIVE speed sensor:

In this mode, the Jaltest SST device generates a signal that simulates the behaviour

of an active sensor. When connecting the Jaltest SST device to the ECU and with

Passive Sensor Read

Passive Sensor

LED must be on, as well as the LED of the errors

LED lights up: Wiring or sensor is defective.

LED lights up: Short circuit to ground (chassis) or power

LED lights up: Incorrect mode has been selected

IMAGE 2

of the connection

mode interacting with the

English

diagram

function