An annual output of Honda Accord 2.4L sedan, the car was severely damaged by the front of the accident, the repair process removed the engine, dashboard, front and rear seats and carpets. Vehicle repair after the test found that the front passenger side seat heater in the case of the switch is not open automatically long-term heating, and the vehicle parked overnight after the battery power will be consumed.
    According to the seat heater circuit diagram, the maintenance personnel first removed the NO.15 (20A) and NO.30 (7.5A) 2 control seat heater relays from the dashboard under the fuse / relay box, and then And disconnect the 4-pin connector of the front passenger side seat heater switch and seat heater, respectively. After the measurement of the seat heater switch 6-pin plug on the 5th brown line ground voltage is 0, normal. And then measure the seat heater side of the plug (we were measuring the front passenger side seat bus bundle), 4-pin plug on the 3rd green line and 2 black line without voltage, but found 4-pin plug 4 green Yellow line and 2 black line voltage of 12V, and long-term electricity. It seems that this is caused by the front passenger side seat heater long-term heating.
    Then the vehicle battery abnormal discharge is also caused by this reason? For this we measured the heater switch 6-pin plug 6 green yellow line with the front passenger side seat heater 4-pin plug 4 green yellow line guide Through the situation, found no conduction. According to the circuit diagram analysis, the line should be conductive, so the test results are obviously not normal. Then the front passenger side seat heater 4-pin plug 4 green yellow line 12V long voltage is where the string came from? Because this car in the repair process disassembled the dashboard and carpet, we put the problem Focus on whether there is a related line insulation damage caused by short circuit between the lines caused by string or wire harness connected wrong.
    Through the analysis of the wiring harness layout of the maintenance manual, we can see that the heater harness is integrated with the instrument wiring harness, and the left side reaches the leftmost multi-channel integrated control system (MICS) of the instrument table, and the right side reaches the right side of the instrument table, To the front passenger side seat. To this end we will center console armrest box and front passenger side seat removed, check the wiring harness between each other is short of the situation, but did not find abnormal. Later, when we dismantled the multi-channel integrated control system (MICS) on the left side of the dashboard, we found the problem that the position of a harness connector was wrong. The plug should have been connected to an adapter in the upper part of the MICS, and the car was plugged into a MICS's original socket. Maintenance personnel carefully observed that the length of the harness connector just with the two socket distance and plug the same shape.
    After repositioning the plug position, and then measure the heater switch 6-pin plug 6 green yellow line and the seat heater green yellow line, is interlinked. When the heater switch is turned off, again measure the front passenger side seat heater green yellow line, no longer voltage, indicating that the original voltage is wrong due to plug from the MICS string over.
    After the vehicle is fully restored, close the door, with the remote control lock car, disconnect the battery negative measurement of the whole car self-discharge current, the test results for 16mA, completely normal.
    Summary: At this point, due to maintenance personnel in the installation of the dashboard in the process of a wrong plug, resulting in front passenger side seat heater long-term heating, so that the battery abnormal discharge. Through the maintenance of the vehicle failure, maintenance personnel that in addition to maintenance personnel in the operation of the problem, there are design problems, that is, manufacturers in the design of the line, in the same position should try to avoid the same shape of the plug, or through the same two Color to plug the socket to match, in order to avoid the line plug inserted into each other, resulting in unnecessary human failure.