Meter: Overview Lexus LS IV

OPERATION CHECK

1. INSPECT INDICATOR/WARNING LIGHT Check the following indicators and warning lights. INDICATORS AND WARNING LIGHTS REFERENCE CHART Indicator/Warning light Switch Condition Specified Condition HEIGHT HIGH indicator light Engine switch off --> on (IG) Comes on for 2 seconds TEMS SPORT indicator light TEMS COMFORT indicator light ABS warning light Engine switch off --> on (IG) Comes on for 3 seconds Master warning light PARK warning light Brake warning light/red (malfunction) AFS OFF indicator light Brake warning light/yellow (minor malfunction) PCS warning light* SRS warning light Engine switch off --> on (IG) Comes on for 6 seconds EPS warning light Engine switch off --> on (IG) Comes on moment engine switch turns on (IG) CHARGE warning light Brake hold standby indicator light Brake hold operated indicator light SLIP indicator light MIL HINT: *: w/ Pre-collision system
2. INSPECT SPEEDOMETER Using a speedometer tester, check that the speedometer reading is within the allowable range shown in the table below. Also, check for proper operation of the odometer. Reference: for mph REFERENCE CHART Standard Indication Acceptable Range 20 mph 20 to 20.3 mph 40 mph 40 to 43.5 mph 60 mph 60 to 64.0 mph 80 mph 80 to 84.5 mph 100 mph 100 to 105.0 mph 120 mph 120 to 125.5 mph 140 mph 140 to 146.0 mph for km/h REFERENCE CHART Standard Indication Acceptable Range 20 km/h (17.5 to 21.5 km/h) 40 km/h 38 to 42 km/h 60 km/h 58 to 63 km/h 80 km/h 78 to 84 km/h 100 km/h 98.5 to 104.5 km/h 120 km/h 119 to 125 km/h 140 km/h 139 to 146 km/h 160 km/h 159 to 167 km/h 180 km/h 179 to 188 km/h 200 km/h 199 to 209 km/h 220 km/h 219 to 230 km/h 240 km/h 239 to 251 km/h NOTE: Do not use worn, underinflated or overinflated tires, as the speedometer reading will be inaccurate. Check the deflection width of the speedometer indicator. Reference: 0.5 km/h (0.3 mph)
3. INSPECT TACHOMETER Connect a tune-up tachometer, and start the engine. Compare the test results with the tachometer indicator. DC 13.5 V, at 25°C (77°F) STANDARD INDICATION REFERENCE CHART Standard indication (rpm) Acceptable range Data in () is for reference 700 630 to 770 1000 (900 to 1100) 2000 (1850 to 2150) 3000 2800 to 3200 4000 (3800 to 4200) 5000 4800 to 5200 6000 (5750 to 6250) 7000 6700 to 7300 8000 (7700 to 8300) If the result is not as specified, the speedometer may have a malfunction.
4. INSPECT ENGINE OIL PRESSURE WARNING Disconnect the connector from the engine oil pressure switch. Turn the engine switch on (IG). Ground the terminal of the wire harness side connector for 10 seconds or more, and then check the low oil pressure warning light. OK: Oil pressure warning message comes on.
5. INSPECT ENGINE OIL LEVEL WARNING Disconnect the engine oil level sensor connector for 40 seconds or more. Turn the engine switch on (IG), and check the multi-information display. OK: Low engine oil level message is displayed.
6. INSPECT MULTI-INFORMATION DISPLAY Multi-information display test is available in "ACTIVE TEST" or "Active Test" (See «DATA LIST/ACTIVE TEST» ).

1. CUSTOMIZING FUNCTION WITH TECHSTREAM (REFERENCE) NOTE: When the customer requests a change in a function, first make sure that the function can be customized. Be sure to make a note of the current settings before customizing. When troubleshooting a function, first make sure that the function is set to the default setting. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream ON. Enter the following menus: Customize Setting. Select the setting by referring to the table below. Warning: WARNING REFERENCE CHART Display (Item) Default Contents Setting Key Remind Volume Large To change volume of key reminder buzzer Large/Medium/Small Key Remind Sound Normal To change frequency of key reminder buzzer Normal/Fast/Slow Seat Belt Warning D/P ON To change seat belt warning buzzer D/P ON/D ON/P ON/D/P OFF Display: DISPLAY REFERENCE CHART Display (Item) Default Contents Setting Language English To change language of display English/Spanish/French*/German*/Italian* HINT: *: except U.S.A. Unit Conversion: UNIT CONVERSION REFERENCE CHART Display (Item) Default Contents Setting Units By Region MI/g US To change unit of display Km/I JP/Km/I/MI/g US/MI/g UK

DESCRIPTION

This DTC is output when the No. 1 meter ECU detects the fuel sender gauge malfunction via the CAN.

DTC DETECTION CONDITION CHART

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1. CHECK CAN COMMUNICATION SYSTEM Check for the DTC (See «DTC CHECK/CLEAR» ). Result: RESULT REFERENCE CHART Result Proceed to CAN communication system DTC is not output A CAN communication system DTC is output B B: Go to CAN COMMUNICATION SYSTEM (See «CAN COMMUNICATION SYSTEM»(/lexus/ls/iv-2006-2012/remont/communication-devices/#can-communication) ) A: Go to Next Step
2. PERFORM ACTIVE TEST USING TECHSTREAM (FUEL RECEIVER GAUGE) Operate the Techstream according to the steps on the display and select "Active Test". OK: Needle indication is normal. Combination Meter: COMBINATION METER REFERENCE CHART Tester Display Test Part Control Range Fuel Meter Operation Fuel receiver gauge Empty, 1/2 or Full NG: REPLACE NO. 1 METER ECU (See «DISASSEMBLY» ) OK: Go to Next Step
3. READ VALUE USING TECHSTREAM (FUEL SENDER GAUGE) Operate the Techstream according to the display and select the "Data List". OK: Fuel value displayed on Techstream is almost same as needle indication Combination Meter: COMBINATION METER REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note Fuel Input Fuel sender gauge (main) input signal/Min.: 0, Max.: 127.5 Fuel sender input value Unit: L NG: Go to step 4 OK: REPLACE NO. 1 METER ECU (See «DISASSEMBLY» )
4. INSPECT FUEL SENDER GAUGE ASSEMBLY (MAIN) Remove the fuel sender gauge (main) (See «DISASSEMBLY» ). Measure the resistance according to the value (s) in the table below. Standard resistance STANDARD RESISTANCE REFERENCE CHART Tester Connection Condition Specified Condition 1 - 2 Float level is F (upper) 6.5 to 8.5 ohms Between float level is F (upper) and E (lower) 91.0 to 102.2 ohms Float level is E (lower) 184.8 to 188.8 ohms NG: REPLACE FUEL SENDER GAUGE ASSEMBLY (MAIN) (See «DISASSEMBLY» ) OK: Go to Next Step
5. INSPECT FUEL SENDER GAUGE ASSEMBLY (SUB) Remove the fuel sender gauge (sub) (See «DISASSEMBLY» ). Measure the resistance according to the value (s) in the table below. Standard resistance STANDARD RESISTANCE REFERENCE CHART Tester Connection Condition Specified Condition 1 - 2 Float level is F (upper) 6.5 to 8.5 ohms Between float level is F (upper) and E (lower) 112.7 to 125.7 ohms Float level is E (lower) 220.7 to 225.7 ohms NG: REPLACE FUEL SENDER GAUGE ASSEMBLY (SUB) (See «DISASSEMBLY» ) OK: Go to Next Step
6. CHECK HARNESS AND CONNECTOR (REAR JUNCTION BLOCK - FUEL SENDER GAUGE) Disconnect the S61 junction block connector. Disconnect the S11 and R10 gauge connectors. Measure the resistance according to the value (s) in the table below. Standard resistance STANDARD RESISTANCE REFERENCE CHART Tester Connector Condition Specified Condition S61-7 (FR) - S11-2 Always Below 1 ohms S61-18 (FE) - R10-2 S61-7 (FR) or S11-2 - Body ground Always 10 kohms or higher S61-18 (FE) or R10-2 - Body ground NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
7. CHECK HARNESS AND CONNECTOR (FUEL SENDER GAUGE (MAIN) - FUEL SENDER GAUGE (SUB)) Disconnect the S11 and R10 gauge connectors. Measure the resistance according to the value (s) in the table below. Standard resistance STANDARD RESISTANCE REFERENCE CHART Tester Connection Condition Specified Condition S11-3 - R10-1 Always Below 1 ohms S11-3 or R10-1 -Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to Next Step
8. REPLACE NO. 1 METER ECU Temporarily replace the No. 1 meter ECU with a new one (See «DISASSEMBLY» ).
9. CHECK NO. 1 METER ECU (FUEL RECEIVER GAUGE) Check that the operation of the fuel sender gauge in the meter returns to normal (See «OPERATION CHECK» ). OK: Operation of the fuel sender gauge returns to normal. NG: REPLACE LUGGAGE ROOM JUNCTION BLOCK ASSEMBLY (REAR JUNCTION BLOCK ECU) OK: END (NO. 1 METER ECU IS DEFECTIVE)

The No. 1 meter ECU communicates with the ECM via the CAN line.

DTC DETECTION CONDITION CHART

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The No. 1 meter ECU communicates with the skid control ECU via the CAN line.

DTC DETECTION CONDITION CHART

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This circuit is the power source circuit for the No. 1 meter ECU. This circuit provides 2 power source types: 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. If a voltage of 12 V is not applied to terminal IG2 when the engine switch is on (IG), the indicator will not operate.

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1. INSPECT FUSE (D MPX-B 1, P IG2) Remove the D MPX-B 1 fuse from the main body ECU. Remove the P IG2 fuse from the passenger side junction block. Measure the resistance according to the value (s) in the table below. Standard resistance STANDARD RESISTANCE REFERENCE CHART Tester Connection Condition Specified Condition D MPX-B 1 fuse Always Below 1 ohms P IG2 fuse NG: REPLACE FUSE OK: Go to Next Step
2. CHECK HARNESS AND CONNECTOR (NO. 1 METER ECU - BATTERY AND BODY GROUND) Disconnect the L10 ECU connector. Measure the resistance and voltage according to the value (s) in the table below. Standard resistance STANDARD RESISTANCE REFERENCE CHART Tester Connection Condition Specified Condition L10-17 (E2) - Body ground Always Below 1 ohms L10-18 (ES) - Body ground Standard voltage STANDARD VOLTAGE REFERENCE CHART Tester Connection Switch Condition Specified Condition L10-14 (IG2) - Body ground Engine switch on (IG) 11 to 14 V L10-13 (B) - Body ground Always NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE NO. 1 METER ECU (See «DISASSEMBLY» )

The No. 1 meter ECU receives vehicle speed signals from the skid control ECU via the CAN line. The vehicle speed sensor detects the voltage that varies according to the vehicle speed. The skid control ECU supplies power to the vehicle speed sensor. The skid control ECU detects vehicle speed signals based on the pulses of the voltage.

The No. 1 meter ECU receives engine revolution signals from the ECM via the CAN line. The No. 1 meter ECU displays engine revolution data that is calculated based on the data received from the ECM.

In this circuit, the No. 1 meter ECU receives engine coolant temperature signals from the ECM using CAN communication lines. The No. 1 meter ECU displays an engine coolant temperature that is calculated based on the data received from the ECM.

The meter's ODO/TRIP display changes each time the trip switch is pressed.

HINT

For more information about changing between displays, refer to the owner's manual.

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1. READ VALUE USING TECHSTREAM (TRIP SWITCH) Operate the Techstream according to the display and select "Data List". OK: Switch condition (ON/OFF) can be switched by actual operation. Combination Meter: COMBINATION METER REFERENCE CHART Tester Display Measurement Item/Range Normal Condition Diagnostic Note ODO/TRIP Change SW Trip switch (ODO/TRIP switch) condition/ON or OFF ON: Switch is pushed OFF: Switch is not pushed - Trip Reset SW Trip switch (RESET switch) condition/ON or OFF ON: Trip switch (ODO/TRIP switch) pushed OFF: Trip switch (ODO/TRIP switch) not pushed - NG: Go to step 2 OK: REPLACE NO. 1 METER ECU (See «DISASSEMBLY» )
2. INSPECT TRIP SWITCH Remove the trip switch (See «REMOVAL» ). Measure the resistance according to the value (s) in the table below. Standard resistance STANDARD RESISTANCE REFERENCE CHART Tester Connection Switch Condition Specified Condition 5 (RSET) - 6 (E) RESET switch ON (Pushed) Below 1 ohms RESET switch OFF (Not pushed) 10 kohms or higher 7 (A/B) - 6 (E) ODO/TRIP switch ON (Pushed) Below 1 ohms ODO/TRIP switch OFF (Not pushed) 10 kohms or higher NG: REPLACE TRIP SWITCH (See «REMOVAL» ) OK: Go to Next Step
3. CHECK HARNESS AND CONNECTOR (NO. 1 METER ECU - TRIP SWITCH AND BODY GROUND) Disconnect the L10 ECU connector. Disconnect the L45 switch connector. Measure the resistance according to the value (s) in the table below. Standard resistance STANDARD RESISTANCE REFERENCE CHART Tester Connection Condition Specified Condition L10-4 (A/B) - L45-7 (A/B) Always Below 1 ohms L10-5 (RSET) - L45-5 (RSET) L45-6 (E) - Body ground L10-4 (A/B) or L45-7 (A/B) - Body ground Always 10 kohms or higher L10-5 (RSET) or L45-5 (RSET) - Body ground NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE NO. 1 METER ECU (See «DISASSEMBLY» )

The No. 1 meter ECU receives signals for adjusting illumination on the meter of this circuit. The No. 1 meter ECU detects the illumination level selected by the user according to the switch operation.

HINT

The meter illumination level can be adjusted by pushing the rheostat UP and DOWN switches.

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1. READ VALUE USING TECHSTREAM (LIGHT CONTROL RHEOSTAT) Operate the Techstream according to the display and select "Data List". OK: Switch condition (ON/OFF) can be switched by actual operation. Combination Meter: COMBINATION METER REFERENCE CHART Item Measurement Item/Range (Display) Normal Condition Diagnostic Note Light Control Up Switch Light control rheostat (UP) switch/ON or OFF ON: Light control rheostat (UP) switch pushed OFF: Light control rheostat (UP) switch not pushed - Light Control Down Switch Light control rheostat (DOWN) switch/ON or OFF ON: Light control rheostat (DOWN) switch pushed OFF: Light control rheostat (DOWN) switch not pushed - NG: Go to step 2 OK: REPLACE NO. 1 METER ECU (See «DISASSEMBLY» )
2. INSPECT LIGHT CONTROL RHEOSTAT Remove the rheostat (See «REMOVAL» ). Measure the resistance according to the value (s) in the table below. Standard resistance STANDARD RESISTANCE REFERENCE CHART Tester Connection Switch Condition Specified Condition 3 (UP) - 5 (E) UP switch is pushed Below 1 ohms UP switch is not pushed 10 kohms or higher 7 (DOWN) - S (E) DOWN switch pushed Below 1 ohms DOWN switch is not pushed 10 kohms or higher NG: REPLACE LIGHT CONTROL RHEOSTAT (See «REMOVAL» ) OK: Go to Next Step
3. CHECK HARNESS AND CONNECTOR (NO. 1 METER ECU - LIGHT CONTROL RHEOSTAT AND BODY GROUND) Disconnect the L10 ECU connector. Disconnect the L8 rheostat connector. Measure the resistance according to the value (s) in the table below. Standard resistance STANDARD RESISTANCE REFERENCE CHART Tester Connection Condition Specified Condition L10-8 (RHUP) -L8-3 (UP) Always Below 1 ohms L10-7 (RHDW) - L8-7 (DOWN) L8-5 (E) - Body ground L10-8 (RHUP) or L8-3 (UP) - Body ground Always 10 kohms or higher L10-7 (RHDW) or L8-7 (DOWN) - Body ground NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE NO. 1 METER ECU (See «DISASSEMBLY» )

In this circuit, the meter CPU receives auto dimmer signals from the main body ECU using the CAN communication lines. When the meter CPU receives an auto dimmer signal, it dims the meter illumination. The main body ECU determines whether it is daytime, twilight or nighttime based on the waveform transmitted from the automatic light control sensor. If the main body ECU determines that it is daytime, the ECU does not send auto dimmer signals. 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.

HINT

When the meter illumination does not dim at night, the light control rheostat position is at the tail cancel position, or there may be a malfunction in the automatic light control sensor, main body ECU, CAN communication system, wire harness or connector, or combination meter.

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See also:
• CAN COMMUNICATION SYSTEM
• STEERING PAD
• SYSTEM DESCRIPTION
• REMOVAL
• DIAGNOSIS SYSTEM
• FRONT POWER SEAT CONTROL SYSTEM