Geely JL481Q, Руководство пользователя

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Examination:
1. Remove the knock sensor
Remove the knock sensor’s connector. Use a special servicing
tool (SST) to remove the knock sensor (Fig. 270).
2. Examine the knock sensor
Use a multimeter to check whether its terminal is not connected
with its housing (See Fig.271). If so, then you shall replace the
knock sensor.
3. Reinstall the knock sensor. The fastening torque is 44Nm.
Switch off the ignition and take out the ECU plug. Switch on the
ignition, and measure the resistance between KNK in ECU and
the ground wire, which should be larger than 1MΩ (See Fig.272).
IX. Examination of Knock Sensor (KNK)
The EFI circuit can be examined by measuring the resistances and voltages at the ECU wires’ connectors.
1. Examine the ECU voltage
(1) Switch off the ignition, take out the
ECU plug, and then switch on the ignition.
(2) Measure the voltage bB and
E1 (See Fig. 273); the voltage should be
from 9V to 14V. If it does not fall into the
range, please check the fuse and EFI
main relay. Note: the battery’s voltage
must be 11V or above.
The reference voltages for ECU terminals
are shown in Table 13. The terminals of
the engine ECU are shown in Fig. 273.
X. Examination of Electronically Controlled Unit (ECU)
Fig. 270 Remove the knock sensor (KNK)
Fig. 273 SMA car series M7.9.7 ECU terminal overall connector
Fig. 271 Check whether its terminal is connected with its housing
Fig. 272 Measure the resistance of the ECU terminal
connected to the knock sensor
Ohmmeter
Voltmeter
Check ECU voltage
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