Inspection Procedure

INSPECT SOURCE VOLTAGE
1. Check the battery positive voltage.
Standard: 10 to 14 V
1. NG: REPLACE BATTERY
2. OK: GO TO NEXT STEP.
INSPECT FUSE (AIR SUS NO.2)
1. Remove the AIR SUS No.2 fuse from the engine room R/B.
2. Check continuity of the AIR SUS No.2 fuse.
  
  Fig 1: Inspecting Fuse (Air SUS No)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard: Continuity
1. NG: INSPECT FOR SHORT CIRCUIT IN ALL HARNESS AND COMPONENTS CONNECTED TO AIR SUS NO.2 FUSE
2. OK: GO TO NEXT STEP.
INSPECT FUSE (TEMS)
1. Remove the TEMS fuse from the driver side J/B.
2. Check continuity of the TEMS fuse.
  
  Fig 2: Inspecting Fuse (Tems)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard: Continuity
1. NG: INSPECT FOR SHORT CIRCUIT IN ALL HARNESS AND COMPONENTS CONNECTED TO TEMS FUSE
2. OK: GO TO NEXT STEP.
INSPECT SUSPENSION CONTROL ECU
1. Remove the suspension control ECU with connectors being connected.
2. Turn the ignition switch ON, and measure voltage between terminal S19-6 (B) and S20-1 (GND) and between terminal S19-6 (B) and S19-5 (GND2) of the suspension control ECU connector.
  Standard: 10 to 14 V
  
  Fig 3: Measuring Voltage Between Terminal S19-6 (B) And S20-1 (GND)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Turn the ignition switch ON, measure voltage between terminal S20-10 (IG) and S20-1 (GND) and between terminal S20-10 (IG) and S19-5 (GND2) of the suspension control ECU connector.
  Standard: 10 to 14 V
  
  Fig 4: Measuring Voltage Between Terminal S20-10 (IG) And S20-1 (GND)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: CHECK AND REPLACE SUSPENSION CONTROL ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )
2. NG: GO TO NEXT STEP.
CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - BODY GROUND)
1. Disconnect the suspension control ECU connectors.
2. Turn the ignition switch ON, and check continuity between terminal S20-1 (GND) and body ground and between terminal S19-5 (GND2) and body ground.
  
  Fig 5: Checking Continuity Between Terminal S20-1 (GND) And Body Ground
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard: Continuity

HINT:
- OK:
  Repair or replace the harness or the connector between the AIR SUS fuse and the suspension control ECU and/or the TEMS fuse and the suspension control ECU.
- NG:
  Repair or replace the harness or the connector between the suspension control ECU and body ground.
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: GO TO NEXT STEP.
  REPAIR OR REPLACE HARNESS OR CONNECTOR