DTC B241A: Rear Height Control Sensor (From 08/2009): Procedure

1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Check for DTCs. Refer to DTC CHECK / CLEAR .

   OK

   DTC B241A is not output.

NG → See step   2 

OK → See step   15 

1. Check the vehicle condition.
   RESULT
   
   

   Result	Proceed to
   w/o Air Suspension System	A
   w/ Air Suspension System	B

B → See step   7 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / AFS / Data List.
5. Read the display on the Techstream.
   AFS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Height Sens Pw Supply Val	Rear height control sensor power supply value / 0 to 6.25 V	Approx. 5.0 V	-
   Rr Height Sens Signal Val	Rear height control sensor signal value / 0 to 5 V	Approx. 2.5 V (When the vehicle is level)	Value is changed according to vehicle height

   OK

   Normal conditions listed above are displayed.

NG → See step   5 

OK: Go to next step 

1. Connect 3 dry cell batteries (1.5 V) in series.
   Fig 1: Inspecting Rear Height Control Sensor Sub-Assembly RH

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the rear height control sensor sub-assembly RH. Refer to COMPONENTS .
3. Connect a positive (+) lead from the battery to terminal 3 (SHB) and a negative (-) lead from the battery to terminal 1 (SHG).
4. Measure the voltage between terminals 2 (SHRR) and 1 (SHG) while slowly moving the link up and down.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   2 (SHRR) - 1 (SHG)	+45° (High)	4.05 V
   	0° (Normal)	2.25 V
   	-45° (Low)	0.45 V

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Rear Height Control Sensor Sub-assembly RH)

NG → See step   12 

OK → See step   13 

1. Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.
   Fig 2: Identifying A53 AFS ECU (Headlight Swivel ECU Assembly) & R4 Rear Height Control Sensor Sub-Assembly RH Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the R4 rear height control sensor sub-assembly RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A53-18 (SBR) - R4-3 (SHB)	Always	Below 1 Ω
   A53-19 (SHRL) - R4-2 (SHRR)	Always	Below 1 Ω
   A53-21 (SGR) - R4-1 (SHG)	Always	Below 1 Ω
   A53-18 (SBR) - Body ground	Always	10 kΩ or higher
   A53-19 (SHRL) - Body ground	Always	10 kΩ or higher
   A53-21 (SGR) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Rear Height Control Sensor Sub-assembly RH)
   *2	Front view of wire harness connector (to AFS ECU (Headlight Swivel ECU Assembly))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect 3 dry cell batteries (1.5 V) in series.
   Fig 3: Inspecting Rear Height Control Sensor Sub-Assembly RH

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the rear height control sensor sub-assembly RH. Refer to COMPONENTS .
3. Connect a positive (+) lead from the battery to terminal 3 (SHB) and a negative (-) lead from the battery to terminal 1 (SHG).
4. Measure the voltage between terminals 2 (SHRR) and 1 (SHG) while slowly moving the link up and down.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   2 (SHRR) - 1 (SHG)	+45° (High)	4.05 V
   	0° (Normal)	2.25 V
   	-45° (Low)	0.45 V

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Rear Height Control Sensor Sub-assembly RH)

NG → See step   12 

OK → See step   13 

1. Check for DTCs. Refer to DTC CHECK / CLEAR .

   OK

   DTC "C1714 Rear Height Control Sensor LH Circuit Malfunction" is not output.

NG → See step   14 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / AFS / Data List.
5. Read the display on the Techstream.
   AFS
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Height Sens Pw Supply Val	Rear height control sensor power supply value / 0 to 6.25 V	Approx. 5.0 V	-
   Rr Height Sens Signal Val	Rear height control sensor signal value / 0 to 5 V	Approx. 2.5 V (When the vehicle is level)	Value is changed according to vehicle height

   OK

   Normal conditions listed above are displayed.

NG → See step   10 

OK: Go to next step 

1. Temporarily replace the suspension control ECU with a new or normally functioning one. Refer to COMPONENTS .
2. Check for DTCs. Refer to DTC CHECK / CLEAR .

   OK

   DTC B2416 is not output.

NG → See step   13 

OK → END 

1. Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.
   Fig 4: Identifying A53 AFS ECU (Headlight Swivel ECU Assembly) & A54 & A55 Suspension Control ECU Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A54 and A55 suspension control ECU connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A53-18 (SBR) - A55-22 (SHB5)	Always	Below 1 Ω
   A53-19 (SHRL) - A54-27 (SHR2)	Always	Below 1 Ω
   A53-21 (SGR) - A55-21 (SHG5)	Always	Below 1 Ω
   A53-18 (SBR) - Body ground	Always	10 kΩ or higher
   A53-19 (SHRL) - Body ground	Always	10 kΩ or higher
   A53-21 (SGR) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to AFS ECU (Headlight Swivel ECU Assembly))
   *2	Front view of wire harness connector (to Suspension Control ECU)
   *3	Front view of wire harness connector (to Suspension Control ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the suspension control ECU with a new or normally functioning one. Refer to COMPONENTS .
2. Check for DTCs. Refer to DTC CHECK / CLEAR .

   OK

   DTC B2416 is not output.

NG → See step   13 

OK → END