Inspection Procedure

HINT:

• Proceed to troubleshooting following the flow chart, regardless of whether or not DTC C1713/13 or C1714/14 is displayed.
• If DTC C1761/61 (ECU malfunction) and/or C1774/74 (power source circuit) is displayed, perform the inspection necessary for DTC C1761/61 ( DTC C1761/61 ECU MALFUNCTION ) and/or C1774/74 ( DTC C1774/74 POWER SOURCE CIRCUIT ) first.

  (If DTC C1761/61 and C1774/74 are output at the same time, perform the inspection necessary for DTC C1774/74 first.)

• Start the inspection from step 1 when using the hand-held tester, and start from step 2 when not using the hand-held tester.

1. READ VALUE OF HAND-HELD TESTER 
   1. Connect the hand-held tester to DLC3.
   2. Turn the ignition switch ON, and push the hand-held tester main switch ON.
   3. Select the item "RL HEIGHT" or "RR HEIGHT" in the DATA LIST, and read its value displayed on the hand-held tester.
   4. Check the vehicle height value of the height control sensor sub-assy rear with the hand-held tester while pressing the height control switch "UP" and "DOWN".

   Standard: 

   Vehicle height value changes. 

   1. OK: CHECK AND REPLACE SUSPENSION CONTROL ECU (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
   2. NG: GO TO NEXT STEP. 
2. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSY REAR POWER SOURCE) 
   1. Disconnect the height control sensor sub-assy rear connector.
   2. Height control sensor sub-assy rear LH:

      Turn the ignition switch ON, and measure voltage between terminal 1 (SHB) and 3 (SHG) of the height control sensor sub-assy rear wire harness side connector.

      Standard: 4.5 to 5.5 V 

      Fig 1: Checking Harness And Connector (Height Control Sensor Sub-Assy Rear Power Source)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Height control sensor sub-assy rear RH:

      Turn the ignition switch ON, and measure voltage between terminal 1 (SHG) and 3 (SHB) of the height control sensor sub-assy rear wire harness side connector.

      Standard: 4.5 to 5.5 V 

   1. OK: Go to step   4 
   2. NG: GO TO NEXT STEP. 
3. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSY REAR - SUSPENSION CONTROL ECU) 

   Height control sensor sub-assy rear LH: 

   1. Check for open and short circuit in the harness and the connector between terminal 1 (SHB) of the height control sensor sub-assy rear and S18-22 (SBL2) of the suspension control ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
   2. Check for open and short circuit in the harness and the connector between terminal 3 (SHG) of the height control sensor sub-assy rear and S18-21 (SGL2) of the suspension control ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

   Height control sensor sub-assy rear RH: 

   1. Check for open and short circuit in the harness and the connector between terminal 1 (SHG) of the height control sensor sub-assy rear and S18-19 (SGR2) of the suspension control ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
   2. Check for open and short circuit in the harness and the connector between terminal 3 (SHB) of the height control sensor sub-assy rear and S18-20 (SBR2) of the suspension control ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: GO TO NEXT STEP. 
4. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSY REAR - SUSPENSION CONTROL ECU) 

   Height control sensor sub-assy rear LH: 

   1. Check for open and short circuit in the harness and the connector between terminal 2 (SHRL) of the height control sensor sub-assy rear and S18-23 (SHRL) of the suspension control ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

   Height control sensor sub-assy rear RH: 

   1. Check for open and short circuit in the harness and the connector between terminal 2 (SHRR) of the height control sensor sub-assy rear and S18-24 (SHRR) of the suspension control ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: GO TO NEXT STEP. 
5. INSPECT HEIGHT CONTROL SENSOR SUB-ASSY REAR 
   1. Remove the height control sensor sub-assy rear LH or RH.
   2. Connect 3 dry batteries of 1.5 V in series.
   3. Height control sensor sub-assy rear LH:

      Connect terminal 1 (SHB) to the batteries' positive (+) terminal, and terminal 3 (SHG) to the batteries' negative (-) terminal, then apply approximately 4.5 V between terminal 2 (SHRL) and 3 (SHG) in the following conditions.

      Standard: 

      Fig 2: Voltage Standard

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 3: Removing Height Control Sensor Sub-Assy Rear LH Or RH

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result: 

      Fig 4: Result Specification Table

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Height control sensor sub-assy rear RH:

      Connect terminal 3 (SHB) to the batteries' positive (+) terminal, and terminal 1 (SHG) to the batteries' negative (-) terminal, then apply approximately 4.5 V between terminal 1 (SHG) and 2 (SHRR) in the following conditions.

      Standard: 

      Fig 5: Voltage Standard

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result: 

      Fig 6: Result Specification Table

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. B: REPLACE HEIGHT CONTROL SENSOR SUB-ASSY REAR LH 
   2. C: REPLACE HEIGHT CONTROL SENSOR SUB-ASSY REAR RH 
   3. A: GO TO NEXT STEP. 

      CHECK AND REPLACE SUSPENSION CONTROL ECU (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  )