Heater Main Relay: Inspection

WARNING: This page is about a different car, the 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.

REMOVE THESE PARTS:
1. Front door scuff plate LH
2. Cowl side trim LH
3. Lower finish panel
4. Lower LH insert
REMOVE HEATER MAIN RELAY
1. Remove the 3 instrument panel junction block set bolts.
  
  Fig 1: Removing Instrument Panel Junction Block Set Bolts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the heater main relay from relay block No.1.
  
  Fig 2: Removing Heater Main Relay From Relay Block No.1
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT HEATER MAIN RELAY CONTINUITY

Fig 3: Heater Relay Condition Continuity Specifications Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the relay.

Fig 4: Inspecting Heater Main Relay Continuity
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL HEATER MAIN RELAY TO RELAY BLOCK NO.1
INSTALL INSTRUMENT PANEL JUNCTION BLOCK
INSTALL THESE PARTS:
1. Lower LH insert
2. Lower finish panel
3. Cowl side trim LH
4. Front door scuff plate LH