10-142 A/C system 10. A/C and Safety System 10.1.12.9 Removal and refitting of water heating PTC assembly (REV) Removal procedure 1. Turn off all electrical appliances and the start switch. 2. Disconnect the battery negative termin al (refer to 3.1.6.1 Maintenance and inspection of battery) 3. Remove the PTC water pipe assembly (refer to 4.4.8.22 Removal and refitting of PTC heater inlet pipe assembly) 4. Remove the water heating PTC assembly. a. Disconnect 2 connectors of the water heating PTC assembly. b. Unscrew 4 fixing nuts of the water heating PTC assembly bracket. Tightening torque of nut: 20±2Nm. VOYAH FREE