Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OPERATION OF SPEEDOMETER
1. Drive the vehicle and check if the function of the speedometer in the combination meter is normal.
  OK: Actual vehicle speed and the speed indicated on the speedometer are the same.
  
  HINT.
  
  The vehicle speed sensor is functioning normally when the indication on the speedometer is normal
NG: GO TO METER / GAUGE SYSTEM (See PROBLEM SYMPTOMS TABLE )

OK: Go to Next Step
INSPECT MULTI-DISPLAY
1. Disconnect the multi-display connector
2. Measure voltage.
  1. Jack up either one of the drive wheels
  2. Move the shift lever to N.
  3. Turn the engine switch on (IG)
    
    Fig 1: Identifying Terminals Of Multi-Display Connector
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Measure the voltage between terminal SPD of the multi-display and body ground when the drive wheels are turned slowly
    OK: Voltage pulses as shown in the illustration.
  Fig 2: Identifying Voltage Blinking Pattern
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: Go to step 3

OK: REPLACE MULTI-DISPLAY (See REMOVAL )

CHECK HARNESS AND CONNECTOR (COMBINATION METER - MULTI-DISPLAY)

Disconnect the multi-display connector and combination meter connector.

Fig 3: Identifying Terminals Of Multi-Display Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
J50-14 (SPD) - J34-5 (+S)	Engine switch off	Below 1 Ω

Fig 4: Identifying Terminals Of Combination Meter Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (BODY GROUND - MULTI-DISPLAY)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
J50-14 (SPD) - Body ground	Engine switch off	10 kΩ or higher

HINT

If the resistance between terminal SPD and body ground is less than 10 kΩ, there may be a short in a wire harness, connector, or an ECU that is connected to the SPD signal wire.

Fig 5: Identifying Terminals Of Multi-Display Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU

OK: REPLACE COMBINATION METER (See REMOVAL )