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22. Charge the refrigerant system (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - FRONT - STAN- DARD PROCEDURE - REFRIGERANT SYSTEM CHARGE). PUMP-WATER-AUXILIARY DESCRIPTION An electric auxiliary water pump is used on all models OPERATION The A/C-heater control operates the auxiliary water pump when all of the following conditions have been met. • Vehicle speed below 48 km/h (30 mph) • Coolant temperature between 10° C (50° F) and 110° C (230° F) • Front blower motor turned On • Rear temperature heat setting above the halfway setting (60% heat) • No fault conditions detected The A/C-heater control turns the auxiliary water pump Off when any of the following conditions occur. • Vehicle speed above 48 km/h (30 mph) • Coolant temperature above 110° C (230° F) • Front blower motor turned Off The auxiliary water pump cannot be adjusted or repaired and, if faulty or damaged, it must be replaced. The auxiliary water pump is diagnosed using a scan tool. Refer to 24 - HVAC Electrical Diagnostics for more REMOVAL CAUTION: HB PLUMBING - REAR 24 - 485 |