2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 883

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and

Repair/Removal

From 08/2009

TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: C2194/94: Engine Speed Signal Error (Test Mode DTC)

C2194/94 - Engine Speed Signal Error (Test Mode DTC)

DESCRIPTION

The tire pressure warning ECU receives an engine speed signal from the ECM. This DTC is stored upon entering test mode, and cleared when an

engine speed signal of 1000 rpm is detected for 3 seconds or more. This DTC is output only in test mode.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

* When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using Techstream and write

them down before removal.

* It is necessary to perform initialization See: Instrument Panel, Gauges and Warning Indicators/Tire Monitoring

System/Testing and Inspection/Programming and Relearning/Initialization after registration See: Instrument Panel, Gauges

and Warning Indicators/Tire Monitoring System/Testing and Inspection/Programming and Relearning/Registration of the

transmitter IDs into the tire pressure warning ECU if the ECU has been replaced.

PROCEDURE

1. READ VALUE USING TECHSTREAM (ENGINE SPEED)

(a) Turn the engine switch off.

(b) Connect Techstream to the DLC3.

(c) Turn the engine switch on (IG) and turn the tester on.

(d) Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 751

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NG -- REPLACE NO. 2 FLOOR WIRE

OK -- Continue to next step.

18. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

Standard Resistance:

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE

OK -- Continue to next step.

19. CHECK SIDE AIRBAG SENSOR LH

(a) Connect the connector to the rear airbag sensor LH.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 131

Text in Illustration

HINT

Codes other than DTC B1610/13 and B1615/14 may be output at this time, but they are not related to this check.

C -- REPLACE FRONT AIRBAG SENSOR LH

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY See: Relays and Modules/Relays and Modules - Restraints and Safety

Systems/Air Bag Control Module/Service and Repair/Removal

A -- USE SIMULATION METHOD TO CHECK See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting

From 08/2009

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1615/14: Front Airbag Sensor LH Malfunction

B1615/14 - Front Airbag Sensor LH Malfunction

DESCRIPTION

The front airbag sensor LH circuit consists of the center airbag sensor assembly and front airbag sensor LH.

The front airbag sensor LH detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be

deployed.

DTC B1615/14 is recorded when a malfunction is detected in the front airbag sensor LH.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK FRONT AIRBAG SENSOR LH

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 365

Text in Illustration

*1: w/ Navigation System

*2: w/o Navigation System

NG -- REPLACE INSTRUMENT PANEL WIRE

OK -- REPLACE NO. 2 INSTRUMENT PANEL WIRE

20. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Disconnect the instrument panel wire from the No. 2 instrument panel wire.

(d) Connect the cable to the negative (-) battery terminal.

(e) Turn the engine switch on (IG).

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

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 641

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(b) Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire

harness.

Standard Resistance:

for 12 Speakers

for 9 Speakers

(c) Measure the resistance between each of the front No. 2 speakers and body ground to check for a short circuit in the wire harness.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 504

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NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE A/C AMPLIFIER

From 08/2009

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1461/61: Emission Gas NOx Sensor Circuit

B1461/61 - Emission Gas NOx Sensor Circuit

DESCRIPTION

The smog ventilation sensor detects NOx in the emission gas and transmits signals to the A/C amplifier. Based on the signals, the A/C amplifier

performs automatic air inlet control (FRESH, FRESH/RECIRCULATION or RECIRCULATION mode).

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 396

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C -- REPLACE A/C AMPLIFIER

B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE See: Heating and Air

Conditioning/Testing and Inspection/Symptom Related Diagnostic Procedures

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR

From 08/2009

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1451/51: Compressor Solenoid Circuit

B1451/51 - Compressor Solenoid Circuit

DESCRIPTION

In this circuit, the A/C compressor receives a refrigerant compression demand signal from the A/C amplifier.

Based on this signal, the A/C compressor changes the amount of compressor output.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT A/C COMPRESSOR (SOLENOID VALVE)

(a) Disconnect the A/C compressor (solenoid valve) connector.

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

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 426

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NG -- REPLACE INSTRUMENT PANEL WIRE

OK -- Continue to next step.

6. CHECK INSTRUMENT PANEL WIRE ASSEMBLY

(a) Check for a short to B+ in the circuit.

(1) Connect the cable to the negative (-) battery terminal.

(2) Turn the engine switch on (IG).

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

Standard Voltage:

(b) Check for an open in the circuit.

(1) Turn the engine switch off.

(2) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

Standard Resistance:

(c) Check for a short to ground in the circuit.

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

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 782

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NG -- CHECK FRONT DOOR WIRE LH (SHORT TO B+)

OK -- Continue to next step.

48. CHECK WIRE HARNESS (SHORT TO GROUND)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

Standard Resistance:

Text in Illustration

NG -- CHECK FRONT DOOR WIRE LH (SHORT TO GROUND)

OK -- Continue to next step.

49. CHECK SIDE AIRBAG SENSOR LH (FOR FRONT SIDE)

(a) Connect the connectors to the rear airbag sensor LH.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 748

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HINT

Codes other than DTC B1623, B1642, B1643, or 81 and B1628, B1647, B1648, or 82 may be output at this time, but they are not

related to this check.

C -- USE SIMULATION METHOD TO CHECK See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting

B -- REPLACE SIDE AIRBAG SENSOR LH

A -- Continue to next step.

13. CHECK REAR AIRBAG SENSOR LH

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

(d) Interchange the rear airbag sensor RH with LH and connect the connectors to them.

(e) Connect the cable to the negative (-) battery terminal.

(f) Turn the engine switch on (IG), and wait for at least 60 seconds.

(g) Clear the DTCs stored in the memory See: Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Reading and

Clearing Diagnostic Trouble Codes/DTC Check / Clear.

(h) Turn the engine switch off.

(i) Turn the engine switch on (IG), and wait for at least 60 seconds.

(j) Check for DTCs See: Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Reading and Clearing Diagnostic

Trouble Codes/DTC Check / Clear.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 842

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HINT

Codes other than DTC B1603/83, B1612/83, B1613/83, B1608/84, B1617/84 and B1618/84, may be output at this time, but they are

not related to this check.

C -- REPLACE FRONT AIRBAG SENSOR LH

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY See: Relays and Modules/Relays and Modules - Restraints and Safety

Systems/Air Bag Control Module/Service and Repair/Removal

A -- USE SIMULATION METHOD TO CHECK See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting

7. CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Disconnect the instrument panel wire connector from the engine room main wire.

HINT

SST has already been inserted into connector B.

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

Standard Resistance:

Text in Illustration

NG -- REPLACE INSTRUMENT PANEL WIRE

OK -- REPLACE ENGINE ROOM MAIN WIRE

8. CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect the instrument panel wire connector from the engine room main wire.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 348

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*1: w/ Navigation System

*2: w/o Navigation System

NG -- REPLACE INSTRUMENT PANEL WIRE

OK -- REPLACE NO. 2 INSTRUMENT PANEL WIRE

20. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Disconnect the instrument panel wire from the No. 2 instrument panel wire.

(d) Connect the cable to the negative (-) battery terminal.

(e) Turn the engine switch on (IG).

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

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 88

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NG -- REPLACE RADIO RECEIVER ASSEMBLY See: Accessories and Optional Equipment/Radio, Stereo, and Compact

Disc/Radio/Stereo/Service and Repair/Removal

OK -- Continue to next step.

3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE

(a) Enter diagnostic mode.

(b) Press preset switch "2" to change the mode to "Detailed Information Mode".

(c) Identify the component which has stored this code.

Component Table

HINT

* "P440" set by the stereo component amplifier assembly is shown in the preceding illustration as an example.

* For details of the DTC display, refer to DTC Check/Clear See: Accessories and Optional Equipment/Radio, Stereo, and

Compact Disc/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Audio and Visual System (w/o

Navigation System).

NEXT -- Continue to next step.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 671

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HINT

Codes other than DTC B1925, B1926, B1927, B1928, and 78 may be output at this time, but they are not related to this check.

NG -- CHECK NO. 2 FLOOR WIRE (REAR PRETENSIONER SQUIB LH CIRCUIT)

OK -- REPLACE REAR SEAT OUTER BELT ASSEMBLY LH See: Restraints and Safety Systems/Seat Belt Systems/Seat

Belt/Service and Repair/Removal and Replacement/Rear Seat Outer Belt Assembly/Removal

1. CHECK NO. 2 FLOOR WIRE (REAR PRETENSIONER SQUIB LH CIRCUIT)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Disconnect SST from connector C.

(d) Disconnect the No. 2 floor wire from the center airbag sensor assembly.

(e) Check for a short to B+ in the circuit.

(1) Connect the cable to the negative (-) battery terminal.

(2) Turn the engine switch on (IG).

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

Standard Voltage:

(f) Check for an open in the circuit.

(1) Turn the engine switch off.

(2) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 754

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HINT

Codes other than DTC B1622 and B1627 may be output at this time, but they are not related to this check.

C -- REPLACE SIDE AIRBAG SENSOR LH

B -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY See: Relays and Modules/Relays and Modules - Restraints and Safety

Systems/Air Bag Control Module/Service and Repair/Removal

A -- USE SIMULATION METHOD TO CHECK See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting

Part 1

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM:

B1627/82,B1628/82,B1637/82,B1638/82,B1647/82,B1648/82,B1697/82,B1698/82: Lost communication with Side Airbag Sensor LH

B1698/82 - Door Side Airbag Sensor LH Initialization Incomplete

DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat side airbag assembly LH, rear seat side airbag assembly LH and

curtain shield airbag assembly LH) is composed of the center airbag sensor assembly, side airbag sensor LH (for rear side), rear airbag sensor LH

and side airbag sensor LH (for front side).

The side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side) detect impacts to the vehicle and send

signals to the center airbag sensor assembly to determine if the airbag should be deployed.

These DTCs are recorded when a malfunction is detected for the side collision sensor LH circuit (to determine deployment of the front seat side

airbag assembly LH, rear seat side airbag assembly LH and curtain shield airbag assembly LH).

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 460

Text in Illustration

NG -- REPLACE FLOOR WIRE

OK -- Continue to next step.

2. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Restore the released activation prevention mechanism of connector B to the original condition.

(b) Connect the connectors to the front seat side airbag assembly RH and center airbag sensor assembly.

(c) Connect the cable to the negative (-) battery terminal.

(d) Turn the engine switch on (IG), and wait for at least 60 seconds.

(e) Clear the DTCs stored in the memory See: Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Reading and

Clearing Diagnostic Trouble Codes/DTC Check / Clear.

(f) Turn the engine switch off.

(g) Turn the engine switch on (IG), and wait for at least 60 seconds.

(h) Check for DTCs See: Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Reading and Clearing Diagnostic

Trouble Codes/DTC Check / Clear.

OK:

DTC B1820, B1821, B1822, B1823 or 55 is not output.

Text in Illustration

HINT

Codes other than DTC B1820, B1821, B1822, B1823 and 55 may be output at this time, but they are not related to this check.

NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY See: Relays and Modules/Relays and Modules - Restraints and

Safety Systems/Air Bag Control Module/Service and Repair/Removal

OK -- USE SIMULATION METHOD TO CHECK See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting

From 08/2009

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1820/55-B1823/55: Short in Side Squib RH Circuit

B1823/55 - Short to B+ in Side Squib RH Circuit

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 166

Text in Illustration

C -- REPLACE A/C AMPLIFIER

B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE See: Heating and Air

Conditioning/Testing and Inspection/Symptom Related Diagnostic Procedures

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR

From 08/2009

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1422/22: Compressor Lock Sensor Circuit

B1422/22 - Compressor Lock Sensor Circuit

SYSTEM DESCRIPTION

The ECM sends the engine speed signal to the A/C amplifier via CAN communication.

The A/C amplifier reads the difference between compressor speed and engine speed. When the difference becomes too large, the A/C amplifier

determines that the compressor is locked, and turns the magnetic clutch off.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Use the Techstream to check if the CAN communication system is functioning normally.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 762

Text in Illustration

NG -- CHECK FRONT DOOR WIRE LH (SHORT)

OK -- Continue to next step.

14. CHECK WIRE HARNESS (SHORT TO B+)

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the engine switch on (IG).

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

Standard Voltage:

Text in Illustration

NG -- CHECK FRONT DOOR WIRE LH (SHORT TO B+)

OK -- Continue to next step.

15. CHECK WIRE HARNESS (SHORT TO GROUND)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 289

Text in Illustration

NG -- CHECK NO. 2 FLOOR WIRE (SHORT TO B+)

OK -- Continue to next step.

5. CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (SHORT TO GROUND)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

Standard Resistance:

Text in Illustration

NG -- CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND)

OK -- Continue to next step.

6. CHECK SEAT POSITION AIRBAG SENSOR

(a) Connect the connectors to the center airbag sensor assembly and seat position airbag sensor.

(b) Connect the cable to the negative (-) battery terminal.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 701

Text in Illustration

HINT

Codes other than DTC B1642, B1643, or 81 and B1647, B1648, or 82 may be output at this time, but they are not related to this

check.

C -- USE SIMULATION METHOD TO CHECK See: Accessories and Optional Equipment/Antitheft and Alarm

Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting

B -- REPLACE SIDE AIRBAG SENSOR RH (FOR REAR SIDE)

A -- Continue to next step.

17. CHECK REAR AIRBAG SENSOR RH

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Return the side airbag sensor LH (for rear side) and side airbag sensor RH (for rear side) to their original positions and connect the

connectors.

(d) Interchange the rear airbag sensor LH with RH and connect the connectors to them.

(e) Connect the cable to the negative (-) battery terminal.

(f) Turn the engine switch on (IG), and wait for at least 60 seconds.

(g) Clear the DTCs stored in the memory See: Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Reading and

Clearing Diagnostic Trouble Codes/DTC Check / Clear.

(h) Turn the engine switch off.

(i) Turn the engine switch on (IG), and wait for at least 60 seconds.

(j) Check for DTCs See: Restraints and Safety Systems/Air Bag Systems/Testing and Inspection/Reading and Clearing Diagnostic

Trouble Codes/DTC Check / Clear.