(Continued period) (8) interior lamp gating circuit
12
Under normal conditions J519 fuse SC18 is T73a / there are 12 V voltage terminal 65 (FIG. 12) is applied to the interior lamp W, before reading light W13, W19, and the interior light W44. When the door is closed door switch 4 are turned off, T73a / 4 terminal connected to the other end of the room lamp and the like may also W at a high potential, the potential of both ends of the same room light because, in the off state. When closing the driver’s door is opened F2, T73a / 19 ground signal input terminal of J519, J519 after the door is opened to make the identification T73a / 4 terminal is at low potential, W, W13, W19 and W44 potential difference across the current loop is formed indoor lighting lamp. Path is T73a / 65rarr; room lamp W, before reading light W13, W19 and W44 after the interior light (room lamp switch is gated position) rarr; T73a / 4 terminals, the information transmitted via the data bus to the meter lighting door openers indicator lights show the driver. Indoor lamp operation there are three modes in accordance with a state signal of the ignition switch and door position: First, after closing the door, a delay of about 30 s, J519 is T73a / 4 inverting terminal of a low potential to the high potential, interior lights off; Second Close door lock or the ignition switch ON, the rear door interior lights off immediately; third door is not closed, the interior light delay of approximately 10 min is closed to prevent excessive power consumption. DTM terminal functions can be tested indoor lamp.
(9) electric window control circuit
power window control circuit analysis, see the author of “Auto Driving & Maintenance” magazine published in 2009 five of the “Shanghai Volkswagen Lavida electric car front right Trouble of the window can not lift “article.
(10) horn control circuit
ground signal rarr
horn button H; the airbag spiral cable assembly F138rarr; after J519 is T73a / 29 terminal, J519 identified horn button closure which T73a / 12 V voltage output terminal 72, the horn operation (FIG. 13). Measurements horn button input signal group 031 display area 3, DTM terminals Beeper function test.
13
(11) mirror heating control circuit
When the knob on the mirror is in the heating position switch , E231 and mirror heating switch turned on (FIG. 13), the low signal input J519 T73b / 58 terminal, T73a / 38 12 V output terminal of the voltage applied to the left rear view mirror and right side view of the heating resistor Z4 heating resistor mirror Z5.
E231 checked by measuring the state of switch 032 set value region 3 Now, Z4 and Z5 in the heated state area 033 Group 3 Now, DTM function of the heating resistor terminal test mirror.
(12) windscreens heating control circuit
Integrated press heated rear window switch on the air conditioner control unit E15 J255 (J301), the rear window heating indicator lights K10 heated willingness information from the comfort CAN data bus to the system J519, J519 12 V voltage output terminal through which rarr T73b / 63; the rear window heating resistor Z1rarr; ground windshield performed after heating. Rear window heating condition is engine running, shut down automatically for about 8 min.
after
measurements windscreen heating switch signal E15 in the group 1 and the display 032, the rear window heating control group status display area 033 1. DTM function can be terminal test.
(13) Cruise Control
14
can be seen from (FIG. 14), when the ignition switch ON, the main relay J271 (648) work, the relay terminal 87 rarr; by fuse SC44 (5 a) rarr; cruise main switch E45rarr; J519 of T73b / 45 terminal, and T80 / 24 of the terminals J220, J519 and J220 power simultaneously to give . When the cruise main switch is ON, 12 V voltage signal input of J519 T73b / 47 terminal, so that the identification information of E45 closed to prepare for the next set cruise speed. In the cruise control speed reaches the lower limit (35 km /When a vehicle speed) or more of H, if the detected GRA Suite E227 J519 set (SET-) cruise vehicle speed signal, it transmits an instruction execution J220 cruising to the engine control unit via the data bus, and storing the set vehicle speed. J220 set vehicle speed calculated target value of the throttle opening degree is required, the electronic control throttle valve positioning motor G186, G187 meter according to the actual vehicle speed and throttle potentiometer, feedback correction signal conditioning G188 G186, to approach the target vehicle speed setting value.
cruise operation, may identify E227 J519 recovery / acceleration (RES / +) and the set / deceleration (SET / -) signal, the signals transmitted through the data bus to J220, performed to increase / decrease small and set vehicle speed cruise control is temporarily closed after the return instruction set vehicle speed.
cruise main switch signal E45 and E227 GRA switch group 004 displayed in the measured value, the vehicle speed signal group 002 is displayed in four areas.
2.BCM provided encoding
As with other popular models, Sunny can be performed by matching the options under VAS505X self-diagnosis function and the guide function BCM personalized settings.
(1) BCM match channel
BCM have the following common match channel.
① passage 4 is 15 km / h lock, factory set to zero.
② channel 3 is energized when the ignition switch is unlocked 86s, factory set to zero.
③ safety locking channel 5 is, as a factory setting.
④ passage 6 is opened while the door 4 is unlocked, the factory is set to 0, set to 1 if modified, compared with a single door opening.
⑤ passage 9 is horn tips, to unlock the factory is set to 0.
⑥ horn passage 11 is blocking prompt, factory set to zero.
⑦ passage 12 is blocking / unlocking flashing turn signal to prompt factory setting is 1.
⑧ channel 13 is activated when the vehicle theft alarm horn in the security state, theThe factory setting is 1.
⑨ channel 15 is a remote controller setting, factory set to 0, if the modification is set to 1, it indicates to cancel the remote control.
⑩ passage 20 highway flasher mode, a factory setting.
{11} is the alarm channel 21 during emergency braking, as a factory setting. Tip emergency braking is an additional function of an ABS, the ABS control is integrated in the software. In the following two cases ABS control unit recognizes the vehicle in an emergency braking state, open the emergency flashing warning lights, rear of the vehicle to prompt attention. These two cases:. A high adhesion coefficient road surface is greater than the vehicle speed 60 km / h, the braking intensity sufficiently large braking; B at low road adhesion coefficient ABS brake intervention occurs, for a relatively long time continuing brake control.
(2) encoding BCM
Sunny cars using BCM 26 hexadecimal byte length coding to control operation of the appliance body, the lower menu 09 Address space control unit 002 sets 01 within recognition options can be read. Comparative BCM enters the changes before and after a certain length coded match channel modify the settings, personalization can be found in the substance is achieved by modifying the length encoding.
3. Analysis of a typical case
When the car body Warmyes electrical failure, the query may be utilized VAS505X fault diagnostic fault memory J519, or using the measured values, where the power supply circuit is normal fault Buyers , it has been associated with the switching signal to the control unit. It may also be utilized if the diagnostic test mode (DTM) to check the state of normal electrical actuator. The inspection method can achieve a multiplier effect. The following examples to illustrate with a few ideas repair and inspection methods Lavida sedan body electrical failure.
Case 1
Failure phenomenon: a 2009 production of 1.6 L Sunny sedan with automatic transmission, mileage 548 km, due to stop in at the low-lying, typhoons are flooded with water. By maintenance personnel inspect the car after the invasion of water and found a mess, to be disintegrated remove stagnant water, replace the entire vehicle wiring harness. When the self-diagnosis operation is completed, VAS5052 fault diagnostic BCM can access the vehicle body control unit, to confirm loss BCMBad. Replacement of the BCM J519 error memory access, there are 01044 (the control unit of error codes DTCs), and can not be cleared. After encoding of the car BCM, automatically clear fault code 01044 26 bytes with the same length coding models the BCM. After completion of the remote control match, to carry out BCM function tests found that in addition to not blocking car door remaining functions were normal. When unlocking, the operation of the door lock motor, and a steering LED flickers. When closed, the door lock motor does not respond, and no turn LED flickers.
Analysis examination: no internal fault code J519 case, the measured value Now the driver door key cylinder switch 008 sets a signal region, is not displayed operation keys in the intermediate position, left lock display, a right turn shows locking, this is normal. 015 group 1 and a remote control signal measurement value and a remote control button simultaneous changes, indicating that the lock command has been input to the vehicle BCM. There can unlock door lock actuator motor action, indicating lock motors line is no problem. BCM control unit should not output the latch control signal.
15
checks the lock condition of the vehicle, the instrument panel door opening indicator was observed, opening the luggage compartment and VAS5052 measurement indicator, indicating 4 luggage compartment and a door contact switch are normal, the key is removed, D / 86s energized, to lock the door fully meet the conditions. Through access to information, the mass of cars have transportation and production patterns, in these modes, BCM some limited functionality. From this direction to try to troubleshoot.
Troubleshooting: VAS5052 into the guide with the BCM function, click matching / setting options in the submenu function, special function selection module (FIG. 15), thereby entering the closed mode of production options. BCM does is under production mode, click the Close button to close the display mode of production success. Commissioning, central locking function returned to normal.
(Continued)
(Chenzhong Ze)