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.

HINT:

When using the intelligent tester, start from 1. When not using the intelligent tester, start from 2.

READ VALUE OF INTELLIGENT TESTER (STEERING SENSOR)
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch ON and push the intelligent tester main switch ON.
3. Select the DATA LIST mode on the intelligent tester.
4. Check that the steering wheel turning angle value of the steering angle sensor displayed by the intelligent tester is changing when turning the steering wheel.
  OK:
  
  Steering angle turning value must be changing.
NG: Go to step 3

OK: REPLACE SUSPENSION CONTROL ECU

CHECK SUSPENSION CONTROL ECU

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

Measure the voltage between terminals SS2+ and SS2- of the suspension control ECU connector and body ground when the steering wheel is turned slowly.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
S20-3 (SS2+) - Body ground	Below 1 to Approximately 5 V
S20-16 (SS2-) - Body ground	Below 1 to Approximately 5 V

OK: REPLACE SUSPENSION CONTROL ECU

Fig 1: Measuring Voltage Between Terminals SS2+ & SS2- Of Suspension Control ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: GO TO NEXT STEP

CHECK WIRE HARNESS (COMBINATION SWITCH - BATTERY AND BODY GROUND)

Remove the steering wheel No. 2 and No. 3 covers, steering wheel pad, steering wheel column upper and lower covers (see REMOVAL ).
Disconnect the combination switch connector (for steering angle sensor).

Measure the voltage between terminals 1 and 2 of the steering angle sensor connector.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
C17-1 (IG1) - C17-2 (ESS)	Ignition switch ON	9 to 14 V
C17-9 (BAT) - C17-2 (ESS)	Always	9 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 2: Measuring Voltage Between Terminals 1 & 2 Of Steering Angle Sensor Connector

OK: GO TO NEXT STEP

INSPECT COMBINATION SWITCH
1. Apply battery positive voltage between terminals 1 and 2.
2. Measure the resistance between terminals 2 and 7, 8 of the steering angle sensor connector when the rotating part of the steering angle sensor is turned slowly.
  Standard resistance:
  
  Changes between 0 ohms and infinite ohms
NG: REPLACE STEERING ANGLE SENSOR

Fig 3: Measuring Resistance Between Terminals 2, 7 & 8 Of Steering Angle Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

CHECK WIRE HARNESS (COMBINATION SWITCH - SUSPENSION CONTROL ECU)

Disconnect the suspension control ECU connector.
Disconnect the combination switch connector.

Measure the resistance between terminals 3 and 16 of the suspension control ECU connector and terminals 4 and 12 of the combination switch connector.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
S20-3 (SS2+) - C17-4 (SS2+)	Below 1 Ω
S20-16 (SS2-) - C17-12 (SS2-)	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE SUSPENSION CONTROL ECU