B. INTERFACE DIAGRAM The below interface diagram shows the WPC ECU/module. The power transfer takes place between the WPC ECU / module and the smart phone device. The inputs to the unit are Ignition, accessories and ground. The unit has a single hardwire PWM output connected to Instrument cluster. C. CHARGING FUNCTION Following all the conditions are applicable in this feature to function correctly Ignition ON (Engine OFF) • Engine ON • Smart phone placed in correct orientation on • the antiskid mat as below. WPC system detects the presence of phone and starts charging as per the Qi standard protocol. The charging status is updated and displayed on the head unit. D. CHARGING STATUS DISPLAY FUNCTION Following all the various conditions that are detected by WPC system and displayed on Head Unit. 1. WPC system in standby mode 2. Smart phone charging ON 3. To Foreign object detection 4. Smart phone battery is full/ Charging completed 5. WPC ECU error (“Error” condition indicates abnormal operating conditions internal system fault or fan stuck/jam). “Error” message displayed on Head Unit E. CONDITIONS TO CHARGE PHONE PROPERLY 1. Keep the charging surface clear of any foreign objects (coins, credit cards, smart cards, keys etc.). 2. Place the smart phone on the charging area marked for positioning the phone, for best results place the smart phone at the center of the charging pad. 3. Charge the smartphone without its cover, cover with metal object or not a thick cover otherwise it would halt the wireless charging. 4. Ensure that the phone is placed with display facing upwards and charging area touching the charging pad surface. 5. Turn ON the ignition to start the charging. Low Voltage Electrical System (LV) 207
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