Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WIRE HARNESS (FLUID PRESSURE SENSOR - SUSPENSION CONTROL ECU)
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: GO TO NEXT STEP

CHECK SUSPENSION CONTROL ECU

Remove the suspension control ECU with connectors still connected.
Turn the ignition switch ON.

Measure the voltage between terminals SHB and SHG of the suspension control ECU connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
S21-1 (SHB) - S21-9 (SHG)	Approximately 5 V

NG: REPLACE SUSPENSION CONTROL ECU

Fig 1: Removing Suspension Control ECU With Connectors

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OK: GO TO NEXT STEP

CHECK FLUID PRESSURE SENSOR

Start the engine and push the vehicle height select switch to select the N mode.

Measure the voltage between terminals 2 and 3 of the fluid pressure sensor connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
F20-2 - F20-3	1.48 to 1.85 V

NG: REPLACE FLUID PRESSURE SENSOR

Fig 2: Measuring Voltage Between Terminals 2 & 3 Of Fluid Pressure Sensor Connector

OK: REPLACE SUSPENSION CONTROL ECU