The Toyota Camry AFS fault lights

A GAC Toyota Camry sedan. Customers OBD2 reflect the the AFS fault on the vehicle instrument lights, come to my shop to check. Vehicles into the plant, technicians start the engine, lit AFS fault is not found. By asking customers, lit the lamp on the night before, and later went out. IT-II, the technicians check the fault code B2412 historical fault code (see Figure 1) in the control unit.

Fault diagnosis: fault code B2412 the headlight rotary obd2 china motor failure or wiring open circuit / short circuit. When the rotating electric machine after receiving a signal from the AFS ECU starts running, and transmits that signal of headlamps direction and headlight rotation state of the motor to AFS ECU. Technicians determine the fault, the first IT-II active testing to confirm that the left front headlight rotary motor work, the results of diagnostic motor does not work. Since the motor is not working we have to first check the lines, check the ECU-IG2 and H-LP LVL fuse normal, normal motor power circuit. Remove the headlight, disconnect the A66 headlamp assembly connector, check the plug resistance is normal, grounded and normal.

Will AFS ECU failure? Disconnect car diagnostic tool the the AFS ECU connector, A61-1-A61-23 terminal resistor and power supply IT-II examination were normal. The fault checking this direct replacement headlight assembly in accordance with the maintenance manual requirements. The external Check all normal, we only open the back cover of the headlight shell ready to replace the headlights, but then found abnormal, normal headlight plug packed position into linear, and the plug the wrong place, such as the Figure 2. Plug stuck in the side of the hand and a pull out, the first impression is that this bulb is not installed, remove the bulb ready to reassemble the trial, but how loaded is not in place, borrowed from the warehouse of a new bulb, contrast learned (as shown in Figure 3), this bulb of the lamp is not original, the bulb fixed foot position and the original does not like causing how loaded plug position is not right. Are factory fitted bulbs, 3 days after the return visit, customers troubleshooting.

When you turn on obd2 scanner the headlights, rotate the motor self-test, plug the wrong place, causing the rotation when the card issuer. Cause a malfunction lamp is lit. Customer later said the truth, lights, check a few days ago in my shop, my shop is recommended to replace the lamp, too expensive to go out to the market installed a did not think a light bulb cause malfunction lights, but fortunately no cause Shigehito accident . Towel in the actual repair work, lack of attention to some of the details and cause failure, though not occur in the shop, but this situation we can learn from.