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 (SPEEDOMETER MALFUNCTION) (See SPEEDOMETER MALFUNCTION )

OK: Go to next Step
CHECK DTC OUTPUT (MULTIPLEX NETWORK COMMUNICATION SYSTEM (BEAN))
1. Clear the DTC (See DIAGNOSIS SYSTEM ).
2. Check for the multiplex network communication system DTCs B1210, B1214 and B1215
  HINT
  
  If the DTCs for the multiplex network communication system malfunction are output, inspect those DTCs first
  
  OK: DTC is not output.
NG: GO TO MULTIPLEX COMMUNICATION SYSTEM (See DIAGNOSTIC TROUBLE CODE CHART )

OK: Go to next Step

READ VALUE USING TECHSTREAM (VEHICLE SPEED SIGNAL)

Connect the Techstream to the DLC3
Turn the engine switch on (IG)

Check the Data List for proper functioning of the vehicle speed signal

Body

ITEM RANGE REFERENCE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Vehicle Speed Signal	Vehicle speed signal/ STOP or RUN	STOP Vehicle is stopped RUN Vehicle is running	-

OK: STOP (vehicle is stopped) and RUN (vehicle is running) appear on the screen.

NG: Go to step 6

OK: Go to next Step

REPLACE POWER SOURCE CONTROL ECU
1. Replace power source control ECU
CHECK FOR DTC
1. Clear the DTC (See DIAGNOSIS SYSTEM )
2. Drive the vehicle
3. Check for DTCs
  OK: DTC B2282 is not output.
NG: REPLACE COMBINATION METER (See REMOVAL )

OK: END (POWER SOURCE CONTROL ECU IS DEFECTIVE)

CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU COMBINATION METER AND EACH ECU)

Disconnect the J55 connector from power source control ECU
Disconnect the J34 connector from combination meter

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

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
J55-19 (SPD) - J34-5 (+S)	Always	Below 1 Ω
J55-19 (SPD) or J34-5 (+S) - Body ground	Always	10 kΩ or higher

Fig 1: Identifying J55 And J34 Connector Terminal

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU (COMBINATION METER - EACH ECU)

OK: Go to next Step

REPLACE POWER SOURCE CONTROL ECU
1. Replace power source control ECU.
CHECK FOR DTC
1. Clear the DTC (See DIAGNOSIS SYSTEM ).
2. Drive the vehicle
3. Check for DTCs.
  OK: DTC B2282 is not output.
NG: REPLACE COMBINATION METER (See REMOVAL )

OK: END (POWER SOURCE CONTROL ECU IS DEFECTIVE)