Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT SOURCE VOLTAGE
1. Check the battery positive voltage.
  OK:
  
  Voltage: 10 - 14 V
- NG: REPLACE BATTERY
- OK: GO TO NEXT STEP.
INSPECT FUSE (FAN RELAY)
1. Remove the FAN RLY fuse from the driver side J/B.
  
  Fig 1: Identifying FAN RELAY Fuse
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check continuity of FAN RELAY fuse.
  OK:
  
  Continuity
- NG: INSPECT FOR SHORT CIRCUIT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FAN RELAY FUSE
- OK: GO TO NEXT STEP.
INSPECT ABSORBER CONTROL ECU
1. Remove the absorber control ECU with connectors still connected.
2. Turn the ignition switch to ON, measure voltage between terminals A22 - 1 (+B) and A22 - 14 (GND) of the absorber control ECU connector.
  
  Fig 2: Measuring Voltage Between Terminals A22-1 & A22-14
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK:
  
  Voltage: 10 - 14 V
- OK: CHECK AND REPLACE ABSORBER CONTROL ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )
- NG: GO TO NEXT STEP.
CHECK HARNESS OR CONNECTOR (ABSORBER CONTROL ECU - BODY GROUND)
1. Disconnect the absorber control ECU connectors.
2. Turn the ignition switch to ON.
3. Measure resistance between terminal A22 - 14 (GND) and body ground.
  
  Fig 3: Measuring Resistance Between A22-14 & Body
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK:
  
  Continuity
- NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
- OK: CHECK AND REPLACE ABSORBER CONTROL ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )