Meter: Overview Lexus IS II

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1. REMOVAL AND INSTALLATION OF THE BATTERY TERMINAL Before performing electrical work, disconnect the battery negative (-) terminal in order to prevent a short in the system. When disconnecting and reconnecting the battery terminal, engine switch and lighting switches off and loosen the terminal nut completely. Perform these operations without prying on the terminal. When the battery terminal is disconnected, the memories of the clock, radio, DTCs, etc. are erased. Before disconnecting the terminal, check and make a note of them. NOTE: When disconnecting the battery negative (-) terminal, initialize the following system after the terminal is reconnected. SYSTEM NAME DESCRIPTION System Name See Procedure Power Window Control System «INITIALIZATION»(ref-235541-S32349848442006062400000)

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Input and output signals of the combination meter assembly

COMMUNICATION LINE DESCRIPTION CHART

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1. METER GAUGE METER/GAUGE METER/GAUGE ITEM DESCRIPTION Item Detail Speedometer Indicates the vehicle speed based on a signal received from the ABS & traction actuator assembly (*1)/Skid Control ECU. (*2) (Direct Line) Tachometer Indicates the engine speed based on a signal received from the ECM. (Direct Line) Fuel Gauge Receives a fuel signal from the two fuel sender gauges (main and sub). (Direct Line) Engine Coolant Temperature Receiver Gauge Indicates the engine coolant temperature based on a signal received from the ECM. (CAN-BEAN) WARNING/INDICATOR WARNING/INDICATOR DESCRIPTION CHART Item Detail TURN SIGNAL Receives a turn signal from the turn signal flasher. (Direct Line) BEAM Receives a beam signal from the main body ECU RH (Cowl Side J/B RH). (BEAN) CHECK E/G Receives a check engine signal from the ECM. (Direct Line) DOOR Open door indicator light comes on receiving a door condition signal from the main body ECU RH (Cowl Side J/B RH). (BEAN) D-BELT Receives a driver side seat belt signal from the center airbag sensor assembly. (CAN-BEAN) P-BELT Receives a front passenger side seat belt signal from the center airbag sensor assembly and transmits a front passenger side seat belt condition signal to the integration control & panel assembly (*3)/multi-display (*4). (Direct Line) HEAD (*5) Receives a taillight signal from the main body ECU RH (Cowl Side J/B RH). (BEAN) TAIL (*6) Receives a taillight signal from the main body ECU RH (Cowl Side J/B RH). (BEAN) A/T SHIFT Receives an A/T shift condition signal from the park/neutral position switch and the ECM. (CANBEAN) FUEL Receives a fuel signal from the fuel sender gauges (main and sub). (Direct Line) ABS Receives a ABS signal from the ABS & traction actuator assembly (*1)/Skid control ECU (*2). (CAN-BEAN) SLIP Receives a SLIP signal from the ABS & traction actuator assembly (*1)/Skid control ECU (*2). (CAN-BEAN) BRAKE Receives a BRAKE signal from the ABS & traction actuator assembly (*1)/Skid control ECU (*2). (CAN-BEAN) CRUISE Receives a cruise signal from the ECM. (CAN-BEAN) AIRBAG Receives an airbag signal from the center airbag sensor assembly. (CAN-BEAN) AFS OFF (*7) Receives an AFS OFF signal from the AFS ECU. (BEAN) EPS Receives an EPS signal from the EPS ECU. (CAN-BEAN) Tire pressure (*8) Receives a tire pressure signal from the tire pressure warning ECU. (BEAN) PCS (*9) Receives a PCS signal from the seat belt control ECU. (CAN-BEAN) Speed warning Receive a vehicle speed signal from the ABS & traction actuator assembly (*1)/Skid control ECU (*2) and displays a speed indicator setting set with the satellite switch. (Direct Line) Tach warning Receive a tachometer signal from the ECM and displays a tach indicator setting set with the satellite switch. (Direct Line) HINT: The multi-information display is located in the center of the combination meter assembly. The display shows a message or animation for each of the functions described in the table below. MULTI-INFORMATION DISPLAY MULTI-INFORMATION DISPLAY DESCRIPTION CHART Item Detail Door warning When a door (front passenger, back and hood) of the vehicle is opened or closed, the dot comes on to inform the driver of the condition of the door. Outside temperature display Displays an outside temperature in accordance with an ambient temperature signal from the A/C control amplifier. Instant fuel consumption Displays the value that has been calculated by the meter CPU, which is based on the driven distance and the fuel consumption volume (fuel injection No. 1 injector), provided that the engine switch on (IG). The display updates every 0.5 seconds. Average fuel consumption Displays a value that has been calculated by the meter CPU, which is based on the driven distance and the fuel consumption volume after the meter CPU detects a refueling. Updated every 10 seconds. Dynamic radar cruise control system display (*10) Displays a description of the operation while the dynamic radar cruise control systems operating. A/T gear position signal Displays the A/T gear position and A/T range receiving a signal from the ECM. Warning message Illuminates or blinks the master warning light and displays a warning message for each type of system failure. DTC (Diagnostic Trouble Code) display Displays the 2 digit DTCs pertaining to the VSC function. ODO/TRIP Display ODO/TRIP DISPLAY REFERENCE Item Display Maintenance required An oil maintenance required indication will display to remind the driver to change the engine oil depending on the vehicle driving distance. ( (1) ) Displays the mode while in the maintenance request reset mode. ODO/TRIP display This display switches between odometer, trip meter A, and trip meter B in accordance with the operation of the ODO/TRIP switch. *1: without VDIM *2: with VDIM *3: without Navigation System *4: with Navigation System (1) for U.S.A. *6: for Canada *7: with Intelligent AFS *8: with Tire Pressure Warning System *9: with Pre-collision System *10: with Dynamic Radar Cruise Control System
2. ILLUMINATION CONTROL HINT: If the engine switch on (IG), the illumination control operates as follows. However, all illuminations other than the tachometer needle turn off while cranking the engine. The speedometer and tachometer needles illuminate starting from the base of the needles and moving to their tips. These needles move to their maximum position and return to zero. The fuel gauge and water temperature gauge light up, then the warning lights, indicator lights, multi-information display, and meter panel illumination come on.
3. MULTI-INFORMATION DISPLAY MULTI-INFORMATION DISPLAY DESCRIPTION CHART Mode Outline Cruise Information In the cruise information mode, seven types of information (Outside Temperature, Driving Range, Average Fuel Consumption, Average Fuel Consumption After Refueling, Current Fuel Consumption, Average Speed, and Sequential Gear Position ( (1) ) can be displayed. The display can be switched by using the DISP switch. Warning The warning mode display will interrupt the multi-information display immediately when a warning occurs. Multi-switch In the multi-switch mode, 5 switches (Sonar ON/OFF ( (2) ), Tire pressure Initial/Tire select Main/2nd ( (3) ), AFS ON/OFF ( (4) ), SPEED indicator ON/OFF, TACH indicator ON/OFF) can be displayed. The switches can be changed using the satellite switch (RH switch, ON/OFF switch, LH switch). Dynamic Radar Cruise Display ( (5) ) Displays the operating condition of the dynamic radar cruise control. Parking Assist-sensor Display Displays the location of an obstacle and the approximate distance between the vehicle and the obstacle and displays malfunction warning messages about sensor freezing or presence of dirt on the sensors. Diagnosis DTCs (Diagnostic Trouble Codes) for the following three systems can be displayed. Brake Control System Tire Pressure Warning System ( (3) ) 4WD Control System( (6) ) (1) for Automatic Transmission (2) with Clearance Sonar System (3) with Tire Pressure Warning System (4) with Intelligent AFS (5) with Dynamic Radar Cruise Control System (6) for 4WD
4. INTEGRATION CONTROL & PANEL ASSEMBLY (without NAVIGATION SYSTEM)/MULTI-DISPLAY (with NAVIGATION SYSTEM) HINT: Integration control & panel assembly (*1) consists of two parts (passenger information display and heater control panel). These areas display the contents given in the table below. Multi-display (*2) consists of four parts (navigation display, passenger information display, clock display, and heater control panel). These areas display the contents given in the table below. ITEM DESCRIPTION Item Detail Passenger information display Displays the condition of the front passenger seat belt ON/OFF. Heater control panel Displays the condition of the heater control panel. Clock display (in the clock assembly) Displays the time. Navigation display ( (1) ) Displays the navigation data. *1: without Navigation System (1) with Navigation System
5. MULTI-INFORMATION DISPLAY FLOW-CHART
6. DIAGNOSIS SYSTEM The combination meter assembly indicates the diagnosis mode by blinking the warning light or by blinking the warning message in the multi-information display. HINT: The multi-information display shows "DIAG" when the engine switch is on (IG) (See «DIAGNOSIS SYSTEM»(ref-235585-S14361846632006062400000) ). Diagnosis information can be displayed on the multi-information display after connecting a jumper wire between TC (J21-13) and CG (J21-4) of the DLC3 connector.
7. SATELLITE SWITCH By using satellite switch (RH switch, ON/OFF switch, LH switch), 5 different switch functions can be displayed and changed (SPEED indicator, TACH indicator, Tire pressure (*1), Sonar (*2), AFS (*3)). HINT: *1: with Tire Pressure Warning System *2: with Clearance Sonar System *3: with Intelligent AFS When the engine switch on (IG) while driving at 3 mph (5 km/h) or less, the switch except for SONAR can be displayed. The switch functions displayed are changed in the order shown in the illustration using the satellite switch (RH switch, LH switch). The function can be set using the ON/OFF switch. The display automatically returns to the previous display 6 seconds after the satellite switch is operated. It will return to the previous display immediately if the DISP switch is operated. SPEED and TACH indicator The SPEED indicator and TACH indicator come on when the vehicle speed or engine speed reaches the speed set using the satellite switch. The setting ranges of these indicators are shown in the table that follows. Vehicle speed or engine speed can be set using the satellite switch. These indicators consist of yellow and red dots that are arranged to form indicator rings. When the set vehicle speed or engine speed is reached while driving, the red and yellow dots will turn on at the same time to cause amber light to illuminate the indicator ring. However, if the vehicle or engine speed is set to the maximum speed of the indicator setting range, and the speed reaches this set speed, only red light will illuminate the indicator ring. HINT: (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-235585-S33355594202006062400000) ) Speed Indicator: SPEED INDICATOR SETTING RANGE REFERENCE Destination Setting Range Initial Setting U.S.A. 30 to 100 (mph) 75 (mph) Canada 50 to 160 (km/h) 120 (km/h) Tach Indicator: TACH INDICATOR SETTING RANGE REFERENCE Destination Setting Range Initial Setting U.S.A. 2,000 to 6,500 (rpm) 5,000 (rpm) Canada 2,000 to 6,500 (rpm) 5,000 (rpm) HINT: (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-235585-S33355594202006062400000) )

DESCRIPTION

1. This circuit is the power source circuit for the meter.
2. This circuit provides two types of power sources; one is a constant power source mainly used as a backup power source, and the other is a power source mainly used for signal transmission. The constant power source is mainly used as a backup power source of the meter CPU, however, it is also used for communication.
3. If a voltage of 12 V is not applied to terminal IG+ when the engine switch is on (IG), the indicator will not operate.

WIRING DIAGRAM

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1. INSPECT COMBINATION METER ASSEMBLY Disconnect the J34 connector. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition J34-1 (E2) - Body ground Always Below 1 ohms C34-13 (ES) - Body ground Always Below 1 ohms Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition J34-12 (IG+) - Body ground Engine switch on (IG) 10 to 14V J34-23 (B) - Body ground Always 10 to 14 V J34-24 (B) - Body ground Always 10 to 14 V NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE COMBINATION METER ASSEMBLY

1. The meter CPU receives vehicle speed signals from this circuit.
2. The vehicle speed sensor detects the voltage that varies according to the vehicle speed.
3. The ABS & traction actuator assembly supplies power to the vehicle speed sensor.
4. The ABS & traction actuator assembly detects vehicle speed signals based on the pulses of the voltage.
5. The ABS & traction actuator assembly transmits vehicle speed signals as pulses to the meter CPU.
6. The meter CPU calculates the vehicle speed converting 4 pulses to 1 revolution

HINT

If the vehicle has a VDIM function, the skid control ECU is built into the ABS & traction actuator assembly.

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HINT

Before starting circuit inspection, check tire size and tire pressure.

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / ACTIVE TEST Check the values by referring to the table below. METER: METER DIAGNOSTIC REFERENCE Item Test Details Diagnostic Note SPEED METER 0, 40, (24), 80 (48), 120 (72), 160 (96), 200 (120) km/h (mph) - OK: Needle indication is within the allowable range. NG : REPLACE COMBINATION METER ASSEMBLY OK : Go To Next Step
2. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / DATA LIST. Check the values by referring to the table below. METER: METER DISPLAY DIAGNOSTIC REFERENCE Item Measurement Item/Range (Display) Normal Condition Diagnostic Note SPEED METER Vehicle speed/Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) Almost same as actual speed (When driving) - OK: Vehicle speed displayed on the tester is almost the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer). NG : Go to step 3 OK : REPLACE COMBINATION METER ASSEMBLY
3. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS OBD/MOBD / ABS/VSC/TRAC / DATA LIST. Check the values by referring to the table below. ABS/VSC/TRAC: ABS/VSC/TRAC DISPLAY DIAGNOSTIC REFERENCE Item Measurement Item/Range (Display) Normal Condition Diagnostic Note (FL/FR/RL/RR) WHEEL SPD Vehicle speed/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Almost same as actual speed (When driving) - OK: Vehicle speed displayed on the tester is almost the same as the actual vehicle speed. NG : GO TO BRAKE CONTROL SYSTEM OK : Go To Next Step
4. INSPECT COMBINATION METER ASSEMBLY Disconnect the A14 (*1)/J77 (*2) connector. Measure the voltage according to the value(s) in the table below. Standard voltage STANDARD VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition A14-12 (SP1) ( (1) ) - Body ground Engine switch on (IG) 10 to 14 V J77-9 (SP1) ( (2) ) - Body ground Engine switch on (IG) 10 to 14 V (1) without VDIM (2) with VDIM Result: RESULT REFERENCE Result Proceed to OK A NG (without VDIM) B NG (with VDIM) C B : Go to step 6 C : Go to step 7 A : Go To Next Step
5. INSPECT COMBINATION METER ASSEMBLY Check the input signal waveform. Remove the combination meter assembly with connector(s) still connected. Connect the oscilloscope to the terminals J34-17 (SI) and body ground. Engine switch on (IG). Turn the wheel slowly. Check the signal waveform according to the condition(s) in the table below. ITEM CONDITION REFERENCE CHART Item Condition Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Driving at approx. 20 km/h (12 mph) OK: The waveform is displayed as shown in the illustration. HINT: As the vehicle speed increases, the cycle of the signal waveform narrows. Result RESULT REFERENCE Result Proceed to OK A NG (for 4GR-FSE) B NG (for 2GR-FSE) C B : REPLACE ABS & TRACTION ACTUATOR ASSEMBLY C : REPLACE SKID CONTROL ECU A : REPLACE COMBINATION METER ASSEMBLY
6. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ABS & TRACTION ACTUATOR ASSEMBLY) Disconnect the J34 and A14 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition A14-12 (SP1) - J34-17 (SI) Always Below 1 ohms A14-12 (SP1) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE COMBINATION METER ASSEMBLY
7. CHECK HARNESS AND CONNECTOR (COMBINATION METER - SKID CONTROL ECU) Disconnect the J77 and J34 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition J77-9 (SP1) - J34-17 (SI) Always Below 1 ohms J77-9 (SP1) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE COMBINATION METER ASSEMBLY

1. The meter CPU receives engine speed signals from the ECM in this circuit.
2. The ECM transmits engine speed signals as pulses to the meter CPU.
3. The meter CPU calculates the engine speed converting 3 pulses to 1 revolution.

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1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / ACTIVE TEST. Check the values by referring to the table below. METER: METER DIAGNOSTIC REFERENCE Item Test Details Diagnostic Note TACHO METER 0, 1,000, 2,000, 3,000, 4,000, 5,000, 6,000, 7,000, 8,000 (rpm) - OK: Needle indication is normal. NG : REPLACE COMBINATION METER ASSEMBLY OK : Go To Next Step
2. READ VALUE OF INTELLIGENT TESTER (ENGINE SPEED SIGNAL) Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / OBD/MOBD/ METER / DATA LIST. Check the values by referring to the table below. METER: METER DISPLAY DIAGNOSTIC REFERENCE Item Measurement Item/Range (Display) Normal Condition Diagnostic Note TACHO METER Engine speed/Min.: 0 rpm, Max.: 12,750 rpm Almost same as actual engine speed (When engine is running) - OK: Engine speed displayed on the tester is almost the same as the actual engine speed. NG : Go to step 3 OK : REPLACE COMBINATION METER ASSEMBLY
3. READ VALUE OF INTELLIGENT TESTER (ENGINE SPEED SIGNAL) Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / OBD/MOBD / ENGINE / DATA LIST. Check the values by referring to the table below. ENGINE: ENGINE DISPLAY DIAGNOSTIC REFERENCE Item Measurement Item/Range (Display) Normal Condition Diagnostic Note ENGINE SPD Engine speed/Min.: 0 rpm, Max.: 12,750 rpm Almost same as actual engine speed (When engine is running) - NG : GO TO «SFI SYSTEM»(/lexus/is/ii-2005-2008/remont/removal-installation/#engine-control-system-4gr-fse) OK : Go To Next Step
4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM) Disconnect the A6 and J34 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition A6-16 (TACH) - J34-16 (S) Always Below 1 ohms A6-16 (TACH) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go To Next Step
5. INSPECT COMBINATION METER ASSEMBLY Check the input signal waveform. Remove the combination meter with the connector still connected. Connect the oscilloscope to the terminal J34-16 (S) and body ground. Start the engine. Check the signal waveform according to the condition(s) in the table below. ITEM CONDITION REFERENCE CHART Item Condition Tool setting 5 V/DIV., 10 ms./DIV. Vehicle condition Engine idle speed OK: The waveform is displayed as shown in the illustration. OK : REPLACE COMBINATION METER ASSEMBLY NG : REPLACE ECM

The meter CPU receives fuel level signals from this circuit. The fuel sender controls the resistance value in accordance with changes in sender gauge position. The meter CPU detects the fuel level from the transformed voltage. The meter CPU outputs a constant voltage of 12 V to the fuel sender. In the fuel sender, the voltage is changed due to the resistance. The changed voltage is output from the fuel sender to the meter CPU, thus the fuel level is determined by fuel injection signals transmitted using the BEAN lines.

HINT

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1. CHECK CAN COMMUNICATION SYSTEM Check if CAN communication DTC is output (See «SYSTEM DESCRIPTION»(ref-235565-S08244194302006062400000) ). Result RESULT REFERENCE Result Proceed to DTC is not output A DTC is output B B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS A: Go To Next Step
2. CHECK MULTIPLEX COMMUNICATION SYSTEM Check if MULTIPLEX communication DTC is output (See «DTC CHECK/CLEAR»(ref-235578-S10348077402006062400000) ). Result RESULT REFERENCE Result Proceed to DTC is not output A DTC is output B B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS A: Go To Next Step
3. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter following menus: DIAGNOSIS / OBD/MOBD / METER / ACTIVE TEST. Check the values by referring to the table below. METER: METER DIAGNOSTIC REFERENCE Item Test Details Diagnostic Note FUEL GAUGE EMPTY, 1/2, FULL - OK: Needle indication is normal. NG : REPLACE COMBINATION METER ASSEMBLY OK : Go To Next Step
4. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter following menus: DIAGNOSIS / OBD/MOBD / METER / DATA LIST. Check the values by referring to the table below. METER: METER DISPLAY DIAGNOSTIC REFERENCE Item Measurement Item/Range (Display) Normal Condition Diagnostic Note FUEL GAUGE Fuel input signal Min.: 0, Max.: 255 Fuel gauge indicates (F): 47 Fuel gauge indicates (1/2): 148 Fuel gauge indicates (E): 205 - OK: Fuel value signal displayed on the tester is almost the same as needle indication. NG : Go to step 5 OK : REPLACE COMBINATION METER ASSEMBLY
5. INSPECT FUEL SENDER GAUGE ASSEMBLY Disconnect the connectors from the fuel sender gauges. Measure the resistance according to the value(s) in the table below. Standard resistance: Fuel sender gauge (Main) STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition Q14-2 (S) - Q14-3 (FE) Always 6.5 to 242.6 ohms Standard resistance: Fuel sender gauge (Sub) STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition P10-1 (FS) - P10-2 (E) Always 6.5 to 171.9 ohms NG : REPLACE FUEL SENDER GAUGE ASSEMBLY OK : Go To Next Step
6. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - FUEL SENDER GAUGE ASSEMBLY) Disconnect the fuel tank wires from the fuel sender gauge assembly. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition J34-19 (FR) - Q14-2 (S) Always Below 1 ohms Q14-3 (FE) - P10-1(FS) Always Below 1 ohms P10-2 (E) - J34-2 (FE) Always Below 1 ohms Q14-2 (S) - Body ground Always 10 kohms or higher P10-1 (FS) - Body ground Always 10 kohms or higher J34-2 (FE) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : Go To Next Step
7. INSPECT FUEL SENDER GAUGE ASSEMBLY Disconnect the fuel sender gauge connector. Inspect the fuel sender gauge assembly (main). Remove the fuel sender gauge assembly (main). Check that the float moves smoothly between F and E. Measure the resistance between the terminals 2 (S) and 3 (FE) of connector according to the value(s) in the table below. Standard resistance: Main FLOAT LEVEL RESISTANCE REFERENCE Float Level Resistance (ohms) F 6.5 to 8.5 Between E and F 6.5 to 242.6 (Gradually changes) E 237.6 to 242.6 Inspect the fuel sender gauge assembly (sub). Remove the fuel sender gauge assembly (sub). Check that the float moves smoothly between F and E. Measure the resistance between the terminals 1 (FS) and 2 (E) according to the value(s) in the table below. Standard resistance: Sub FLOAT LEVEL RESISTANCE REFERENCE Float Level Resistance (ohms) F 6.5 to 8.5 Between E and F 6.5 to 171.9 (Gradually changes) E 167.9 to 171.9 NG : REPLACE FUEL SENDER GAUGE ASSEMBLY OK : Go To Next Step
8. REPLACE COMBINATION METER ASSEMBLY Replace the combination meter assembly to a new one or a known normal one. OK: The operation of the combination meter assembly returns to normal. NG : REPLACE ECM OK : END

1. In this circuit, the meter CPU receives engine coolant temperature signals from the ECM using the CAN lines.
2. The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.

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HINT

If there is an open or short in the engine coolant temperature sensor circuit, the ECM will store the DTCs.

Perform troubleshooting of the "SFI System" (See DATA LIST / ACTIVE TEST (for 2GR-FSE), See DATA LIST / ACTIVE TEST (for 4GRFSE)).

1. CHECK CAN COMMUNICATION SYSTEM Check if CAN communication DTC is output (See «SYSTEM DESCRIPTION»(ref-235565-S08244194302006062400000) ). Result RESULT REFERENCE Condition Proceed to DTC is not output A DTC is output B B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS A: Go To Next Step
2. CHECK MULTIPLEX COMMUNICATION SYSTEM Check if MULTIPLEX communication DTC is output (See «DTC CHECK/CLEAR»(ref-235578-S10348077402006062400000) ). Result RESULT REFERENCE Condition Proceed to DTC is not output A DTC is output B B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS B: Go To Next Step
3. PERFORM ACTIVE TEST BY INTELLIGENT TEST Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / ACTIVE TEST. Check the values by referring to the values in the table below. METER: METER DIAGNOSTIC REFERENCE Item Test Details Diagnostic Note COOLANT TEMP LOW, NORMAL, HI - OK: Needle indication is normal. NG : REPLACE COMBINATION METER ASSEMBLY OK : Go To Next Step
4. READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / OBD/MOBD / ENGINE / DATA LIST. Check the values by referring to the values in the table below. ENGINE: ENGINE DISPLAY DIAGNOSTIC REFERENCE Item Measurement Item/Range (Display) Normal Condition Diagnostic Note WATER TEMP Engine coolant temp: -40°C (- 40°F) to 140°C (284°F) After warming up: 80 to 95°C (176 to 203°F) - OK: Engine coolant temperature value displayed on the tester is almost the same as needle indication. NG : GO TO «SFI SYSTEM»(/lexus/is/ii-2005-2008/remont/removal-installation/#engine-control-system-4gr-fse) OK : Go To Next Step
5. REPLACE COMBINATION METER ASSEMBLY OK: The operation of the combination meter assembly returns to normal. NG : REPLACE ECM OK : END

1. The meter CPU receives signals for adjusting illumination on the meter and instrument panel from this circuit
2. The meter CPU detects the illumination level selected by the user according to the position of the rheostat knob. HINT
3. This model is equipped with an Optitron meter, therefore the meter illuminates even in the daytime.
4. The meter illumination level can be adjusted by turning the rheostat.
5. The meter illumination dims when the light control switch is turned to the TAIL or HEAD position at night.
6. Turning the rheostat knob fully clockwise cancels the above dimmer control.
7. Turning the rheostat knob fully counterclockwise turns the meter illumination off.

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1. SYSTEM CHECK Result RESULT REFERENCE Result Proceed to Meter illumination does not change when operate the light control rheostat knob A Dimmer cancel does not operate B B : Go to step 7 A : Go To Next Step
2. READ VALUE OF INTELLIGENT TESTER (RHEOSTAT VOL) Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / DATA LIST. Check the values by referring to the table below. METER: METER DISPLAY DIAGNOSTIC REFERENCE Item Measurement Item/Range (Display) Normal Condition Diagnostic Note RHEOSTAT VOL Light control rheostat/Min.: 0, Max.: 255 Light control rheostat switch is Dark (0) --> Bright (255) - OK: The value displayed on the tester gradually changes as the actual rheostat operation. NG : Go to step 4 OK : Go To Next Step
3. READ VALUE OF INTELLIGENT TESTER (TAIL CANCEL SW) Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / DATA LIST. Check the values by referring to the table below. METER: METER DISPLAY DIAGNOSTIC REFERENCE Item Measurement Item/Range (Display) Normal Condition Diagnostic Note TAIL CANCEL SW Tail cancel switch is ON/OFF ON: Light control rheostat turns fully clockwise OFF: Light control rheostat position is except above. - OK: Rheostat position displayed on the tester is same as the actual rheostat position. NG : Go to step 7 OK : REPLACE COMBINATION METER ASSEMBLY
4. INSPECT LIGHT CONTROL RHEOSTAT Remove the light control rheostat with the connector still connected. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition E (J15-1) - RV (J15-4) Turn the rheostat knob fully clockwise 8 to 12 kohms E (J15-1) - RV (J15-4) Rheostat knob is between MIN. and MAX. The value changes gradually (Between approx. 0 to 8 kohms) E (J15-1) - RV (J15-4) Turn the rheostat knob fully counterclockwise Approx. 0 ohms NG : REPLACE LIGHT CONTROL RHEOSTAT OK : Go To Next Step
5. CHECK HARNESS AND CONNECTOR (COMBINATION METER - LIGHT CONTROL RHEOSTAT) Disconnect the J34 and J15 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition J34-14 (ET) - J15-1 (E) Always Below 1 ohms J34-9 (ILL+) - J15-3 (T) Always Below 1 ohms J34-21 (TR) - J15-4 (RV) Always Below 1 ohms J15-1 (E) - Body ground Always 10 kohms or higher J15-3 (T) - Body ground Always 10 kohms or higher J15-4 (RV) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE COMBINATION METER ASSEMBLY
6. READ VALUE OF INTELLIGENT TESTER (TAIL CANCEL SW) Connect the intelligent tester to the DLC3. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / DATA LIST. Check the values by referring to the table below. METER: METER DISPLAY DIAGNOSTIC REFERENCE Item Measurement Item/Range (Display) Normal Condition Diagnostic Note TAIL CANCEL SW Tail cancel switch is ON/OFF ON: Light control rheostat turns fully clockwise OFF: Light control rheostat position is except above. - OK: Rheostat position displayed on the tester is same as the actual rheostat position. NG : Go to step 7 OK : REPLACE COMBINATION METER ASSEMBLY
7. INSPECT LIGHT CONTROL RHEOSTAT Remove the light control rheostat with connector still connected. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition T (J15-2) - TC (J15-3) Turn the rheostat knob fully counterclockwise Below 1 ohms T (J15-2) - TC (J15-3) Turn the rheostat knob fully clockwise 10 kohms or higher NG : REPLACE LIGHT CONTROL RHEOSTAT OK : Go To Next Step
8. CHECK HARNESS AND CONNECTOR (COMBINATION METER - LIGHT CONTROL RHEOSTAT) Disconnect the J34 and J15 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition J34-8 (TC) - J15-2 (TC) Always Below 1 ohms J15-2 (TC) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE COMBINATION METER ASSEMBLY

1. In this circuit, the meter CPU receives auto dimmer signals from the main body ECU RH using the BEAN lines.
2. When the meter CPU receives an auto dimmer signal, it dims the meter illumination.
3. The main body ECU RH determines whether it is daytime, twilight, or nighttime based on the waveform transmitted from the automatic light control sensor.
4. If the main body ECU RH determines that it is daytime, the ECU does not send auto dimmer signals.
5. Therefore, the meter illumination (warning and indicator lights) will not dim even if the driver accidentally turns the light control switch to the TAIL or HEAD position in daytime.

Scheme 41

1. CHECK DTC Check if DTC B1244 is output (See «DTC B1244 LIGHT SENSOR CIRCUIT MALFUNCTION»(ref-235577-S05893728982006062400000) ). Result RESULT REFERENCE Result Proceed to B1244 is not output A B1244 is output B B: GO TO «LIGHTING SYSTEM»(ref-235577-S10895959272006062400000) A: Go To Next Step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3.. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / BODY / MAIN BODY / ACTIVE TEST. Check the meter illumination. MAIN BODY: MAIN BODY DIAGNOSTIC REFERENCE Item Test Details Diagnostic Note DIMMER SIG Auto dimmer signal ON/OFF - OK: The meter illumination is dimmed when the DIMMER SIG is ON. HINT: Refer to the sensitivity setting in the customization table of the automatic light control system. (See «CUSTOMIZE PARAMETERS»(ref-235577-S11660362142006062400000) ) NG: Go to step 3 OK: CHECK LIGHTING SETTING
3. REPLACE COMBINATION METER ASSEMBLY OK: The operation of the combination meter assembly returns to normal. NG : REPLACE MAIN BODY ECU RH OK : END

1. In this circuit, the meter CPU receives auto dimmer signals from the main body ECU RH using the BEAN lines.
2. When the meter CPU receives an auto dimmer signal, it dims the meter illumination.
3. The main body ECU RH determines whether it is daytime, twilight, or nighttime based on the waveform transmitted from the automatic light control sensor.
4. If the main body ECU RH determines that it is daytime, the ECU does not send auto dimmer signals.
5. Therefore, the meter illumination (warning and indicator lights) will not dim even if the driver accidentally turns the light control switch to the TAIL or HEAD position in daytime.

Scheme 42

1. CHECK DTC Check if DTC B1244 is output (See «DTC B1244 LIGHT SENSOR CIRCUIT MALFUNCTION»(ref-235577-S05893728982006062400000) ). Result RESULT REFERENCE Result Proceed to B1244 is not output A B1244 is output B B: GO TO «LIGHTING SYSTEM»(ref-235577-S10895959272006062400000) A: Go To Next Step
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Connect the intelligent tester to the DLC3.. Engine switch on (IG). Turn the tester ON. Enter the following menus: DIAGNOSIS / BODY / MAIN BODY / ACTIVE TEST. Check the meter illumination. MAIN BODY: MAIN BODY DIAGNOSTIC REFERENCE Item Test Details Diagnostic Note DIMMER SIG Auto dimmer signal ON/OFF - OK: The meter illumination is dimmed when the DIMMER SIG is ON. HINT: Refer to the sensitivity setting in the customization table of the automatic light control system. (See «CUSTOMIZE PARAMETERS»(ref-235577-S11660362142006062400000) ) NG: Go to step 3 OK: CHECK LIGHTING SETTING
3. REPLACE COMBINATION METER ASSEMBLY OK: The operation of the combination meter assembly returns to normal. NG : REPLACE MAIN BODY ECU RH OK : END

1. The meter CPU receives satellite switch signals from the satellite switch in this circuit.
2. The meter CPU sends satellite switch signals to the tire pressure warning ECU, AFS ECU, and clearance sonar ECU using the BEAN lines. Each ECU controls every system based on these signals.

Scheme 43

Scheme 44

Scheme 45

1. INSPECT SATELLITE SWITCH Disconnect the connector from the satellite switch. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition J16-2 (LSET) - J16-5 (E) Satellite switch LH is pressed Below 1 ohms J16-2 (LSET) - J16-5 (E) Satellite switch LH is not pressed 10 kohms or higher J16-3 (SET) - J16-5 (E) Satellite switch ON/OFF is pressed Below 1 ohms J16-3 (SET) - J16-5 (E) Satellite switch ON/ OFF is not pressed 10 kohms or higher J16-4 (RSET) - J16-5 (E) Satellite switch RH is pressed Below 1 ohms J16-4 (RSET) - J16-5 (E) Satellite switch RH is not pressed Below 1 ohms NG : REPLACE SATELLITE SWITCH OK : Go To Next Step
2. CHECK HARNESS AND CONNECTOR (COMBINATION METER - SATELLITE SWITCH) Disconnect the J35 and J16 connectors. Measure the resistance according to the value(s) in the table below. Standard resistance STANDARD RESISTANCE SPECIFICATION Tester Connection Condition Specified Condition J35-5 (RSEL) - J16-4 (RSET) Always Below 1 ohms J35-6 (LSEL) - J16-2 (LSET) Always Below 1 ohms J35-7 (SEL) - J16-3 (SET) Always Below 1 ohms J16-2 (LSET) - Body ground Always 10 kohms or higher J16-3 (SET) - Body ground Always 10 kohms or higher J16-4 (RSET) - Body ground Always 10 kohms or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR OK : REPLACE COMBINATION METER ASSEMBLY

Scheme 46

Scheme 47

Scheme 48

Scheme 49

Scheme 50

Scheme 51

Scheme 52

Scheme 53

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait for 90 seconds after disconnecting the cable to prevent airbag deployment (See «AIRBAG SYSTEM»(ref-235542-S13106599752006062400000) ).
2. REMOVE STEERING COLUMN COVER (for Manual Tilt and Telescopic) (See «REMOVAL»(ref-235575-S36243743162006062400000) )
3. REMOVE STEERING COLUMN COVER (for Power Tilt and Power Telescopic) (See «REMOVAL»(ref-235575-S36243743162006062400000) )
4. REMOVE FRONT DOOR SCUFF PLATE LH (w/o Illumination) (See «REMOVAL»(ref-235599-S10274364092006062400000) )
5. REMOVE FRONT DOOR SCUFF PLATE LH (w/ Illumination) (See «REMOVAL»(ref-235599-S10274364092006062400000) )
6. REMOVE FRONT DOOR OPENING TRIM COVER LH (See «REMOVAL»(ref-235591-S20751754672006062400000) )
7. REMOVE SIDE INSTRUMENT PANEL LH (See «REMOVAL»(ref-235591-S20751754672006062400000) )
8. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL SUB-ASSEMBLY (See «REMOVAL»(ref-235591-S20751754672006062400000) )
9. REMOVE INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY Disengage the 2 clips. Remove the 2 screws and remove the instrument cluster finish panel sub-assembly.
10. REMOVE WINDSHIELD WIPER SWITCH ASSEMBLY (See «REMOVAL»(ref-235575-S36243743162006062400000) )
11. REMOVE COMBINATION METER ASSEMBLY Attach protective tape to the position indicated in the illustration. Using a screwdriver, disengage the claw. HINT: Tape the screwdriver tip before use. Using a screwdriver, disengage the claw, pull out the combination meter assembly. HINT: Tape the screwdriver tip before use. Disconnect the connectors and remove the combination meter assembly as shown in the illustration. NOTE: Do not damage the instrument panel safety pad or combination meter assembly when removing the combination meter assembly.
12. REMOVE COMBINATION METER GLASS Disengage the 9 claws and remove the combination meter glass.

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

1. INSTALL COMBINATION METER GLASS Engage the 9 claws and install the combination meter glass.
2. INSTALL COMBINATION METER ASSEMBLY Position the combination meter assembly on the steering column as shown in the illustration. NOTE: Do not damage the instrument panel safety pad or combination meter assembly. Connect the connectors. Engage the 2 positioning pins of the combination meter assembly. Engage the 2 claws and install the combination meter assembly. Remove the protective tape.
3. INSTALL WINDSHIELD WIPER SWITCH ASSEMBLY (See «INSTALLATION»(ref-235575-S42416117012006062400000) )
4. INSTALL INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY Install the 2 clips. Install the instrument cluster finish panel subassembly with the 2 screws.
5. INSTALL LOWER INSTRUMENT PANEL FINISH PANEL SUB-ASSEMBLY (See «INSTALLATION»(ref-235591-S32740741772006062400000) )
6. INSTALL SIDE INSTRUMENT PANEL LH (See «INSTALLATION»(ref-235591-S32740741772006062400000) )
7. INSTALL FRONT DOOR OPENING TRIM COVER LH (See «INSTALLATION»(ref-235591-S32740741772006062400000) )
8. INSTALL FRONT DOOR SCUFF PLATE LH (w/o Illumination) (See «INSTALLATION»(ref-235599-S41342360772006062400000) )
9. INSTALL FRONT DOOR SCUFF PLATE LH (w/ Illumination) (See «INSTALLATION»(ref-235599-S41342360772006062400000) )
10. INSTALL STEERING COLUMN COVER (for Manual Tilt and Telescopic) (See «INSTALLATION»(ref-235575-S42416117012006062400000) )
11. INSTALL STEERING COLUMN COVER (for Power Tilt and Power Telescopic) (See «INSTALLATION»(ref-235575-S42416117012006062400000) )
12. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
13. PERFORM INITIALIZATION NOTE: Some systems need initialization after reconnecting the cable to the negative battery terminal (See «INITIALIZATION»(ref-235541-S32349848442006062400000) ).

Scheme 59

See also:
• SFI SYSTEM
• FUEL SYSTEM