Section 158 (Air Conditioning System (Service)): Relay: Inspection

WARNING: This page is about a different car, the 2004 Lexus GS 430, 2004 Lexus GS 300, 2003 Lexus GS 430, and 2003 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HEATER MAIN RELAY (Marking: HTR) CONTINUITY

Fig 1: Identifying Main Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Heater Main Relay Continuity Condition Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the Main relay.
INSPECT MAGNETIC CLUTCH RELAY (Marking: A/C COMP) CONTINUITY

Fig 3: Identifying Magnetic Clutch Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Magnetic Clutch Relay Continuity Condition Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the Magnetic Clutch relay.
INSPECT No. 2 COOLING FAN RELAY (Marking: FAN No. 2) CONTINUITY

Fig 5: Identifying No. 2 Cooling Fan Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 6: No. 2 Cooling Fan Relay Continuity Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the No. 2 Cooling Fan relay.
INSPECT No. 3 COOLING FAN RELAY (Marking: FAN NO. 3) CONTINUITY
Check the relay in the same way as for "MAGNETIC CLUTCH RELAY".