As the 6th generation intelligent cloud Black King Kong, jinpentium's "diagnosis equipment" series of products have realized "full series fault diagnosis + ten special functions". In particular, it can accurately diagnose and test more than 30 joint venture and domestic models such as Volkswagen, Audi, Nissan, Toyota, Honda, Mitsubishi, Mazda and BAIC.
Take Buick's new LaCrosse (with considerable market ownership) as an example to guide and explain the diagnostic test method of engine, gearbox, SRS, ABS and other systems by "Black King Kong.
Vehicle description:
VIN code: LSGGF53WXDH197605;
Engine displacement: 2.4L;
Year: 2013;
Mileage: 81965KM;
Diagnostic tool: Black King Kong-inch ";
Diagnostic test steps:
1. Connection diagnosis: park the vehicle into the parking space, turn on the ignition switch, pull up the handbrake to ensure the safety of the vehicle parking; Connect the VCI diagnostic box (Bluetooth communication) of the Black King Kong device to the OBD diagnostic interface of the vehicle.
2. Engine fault phenomenon and diagnosis:
When the vehicle is idle, the engine runs normally without jitter. When driving, the engine suddenly turns off occasionally, and the vehicle starts again. After driving for a certain distance, the engine turns off again, and the acceleration is slow and weak.
Select the test path: Buick-lacrosse-2013-engine-2.4 liters, which can read version information, read fault codes, clear fault codes, read data streams, perform action tests, and configure reset functions.
2.1 read the engine system fault code:
2.2 failure analysis: after clearing the fault code, reading the fault code still exists. Analyzing the fault will affect the normal operation of the engine and cause the engine to suddenly shut down during operation. Cause analysis:
(1) the function of camshaft is to control the opening and closing of valve. In the variable valve timing system, the electronic camshaft regulating valve (or oil control valve, OCV) is changed to camshaft adjuster (mechanical) according to the instructions from the Engine Control Module (ECM). Adjust the angle of camshaft by means of oil pressure to ensure that the valve opens and closes at the best time.
(2) causes of failure include A Intake/left/front camshaft regulating valve (oil control valve), its circuit, connector, too dirty engine oil or electronic control module, etc.
(3) use a multimeter to test the solenoid valve circuit. Power supply and iron striking are normal, and eliminate circuit faults.
(4) connector re-plug to prevent connector from being virtual.
(5) pull off the oil control valve, the oil is relatively turbid, and reinstall the oil control valve after cleaning machine. The vehicle is running normally, and the fault code is cleared without reproduction.
(6) observe the running condition of the vehicle. If the failure phenomenon reappears, it is recommended to replace the oil control valve.
2.3 read engine data: read 59 items of data when the engine idling meets the actual working conditions of the vehicle.
2.4 action test: perform tests on multiple components of the vehicle to determine whether the components are working properly.
2.5 configuration/reset: the learning function and reset function are as follows. When the vehicle is repaired and tested, follow the instructions as required.
3. Transmission control module: read version information, fault codes, data streams, and action tests.
3.1 read the transmission module data stream: it can read 45 items such as the speed of the gearbox input shaft, the speed of the gearbox output shaft when the vehicle is in a static state, the gear command, the gearbox oil temperature, the shift time and so on, which are consistent with the actual situation of the vehicle.
3.2 action test: the performance test of shift solenoid valve, transmission shift valve, Pressure Solenoid Valve and gearbox magnetic valve can be performed.
4. Inflatable headrest sensor and module diagnosis (SRS): read version information, read fault codes, read data streams, and action tests.
4.1 read data streams: display sensor and diagnostic module data, deployment Loop 1-14 resistance data, sensor configuration data, and other 25 airbag data.
5. Electronic Brake Control Module (ABS): read the version information of ABS module; Read the data stream to display the real-time working data of ABS system. Each sensor and steering wheel angle; Can perform anti-lock braking system pump motor action test, braking vacuum booster electric vacuum pump status.
