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Home >> Lexus >> 2003 >> GX 470 >> Repair and Diagnosis >> Suspension >> Electronic Suspension >> Electronic Modulated Suspension & Rear Air Suspension System - Diagnosis >> Height Control Off Indicator Lamp Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT HEIGHT CONTROL OFF INDICATOR LAMP OPERATION 
    1. Turn the ignition switch ON, and check the operation of the height control OFF indicator lamp.

      A: Height control OFF indicator lamp does not comes on 

      B: Height control OFF indicator lamp flashes 

    1. B: Go to step   4 
    2. A: Go To Next Step 
  2. INSPECT HEIGHT CONTROL OFF INDICATOR LAMP 

    HINT:

    See combination meter troubleshooting on HOW TO PROCEED WITH TROUBLESHOOTING .

    1. NG: REPAIR OR REPLACE BULB OR COMBINATION METER ASSEMBLY 
    2. OK: Go To Next Step 
  3. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - COMBINATION METER ASSY) 
    1. Check for open and short circuit in the harness and the connector between the suspension control ECU and the combination meter assy (height control OFF indicator lamp) (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: CHECK AND REPLACE SUSPENSION CONTROL ECU (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
  4. CHECK SUSPENSION CONTROL ECU CONNECTORS SECURELY CONNECTED 
    1. NG: CONNECT CONNECTOR TO ECU 
    2. OK: Go To Next Step 
  5. RECONFIRM DTC 
    1. Clear and check the DTC (See PRE-CHECK ).

      Result: 

      RESULT

      Normal code A
      Malfunction code B
    1. B: REPAIR CIRCUIT INDICATED BY OUTPUT CODE 
    2. A: Go To Next Step 
  6. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - COMBINATION METER ASSY) 
    1. Check for open and short circuit in the harness and the connector between the suspension control ECU and the combination meter assy (height control OFF indicator lamp) (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: CHECK AND REPLACE SUSPENSION CONTROL ECU (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  )