2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 728

(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 / Trouble Codes.

(e) Read the DTCs.

Result:

NOTICE:

When DTC C2173/73 is output, troubleshoot that DTC first. Then troubleshoot DTCs C2121/21 to C2124/24.

B -- GO TO DTC C2173/73

A -- Continue to next step.

2. CHECK FREQUENCY RECEIVING CONDITION

(a) Check that the vehicle is located in an area such as described below:

(1) Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.

HINT

If the vehicle is located in an area described above, the tire pressure warning light may turn on only in a particular area due to

interfering radio frequencies.

(2) Devices using similar radio frequencies are used in the vehicle.

OK:

Facilities, or devices that use similar radio frequencies are not located in the vicinity of the vehicle.

HINT

Radio transmissions may be interrupted due to the surroundings, or devices installed by the user.

NG -- CHECK IF ANY DEVICE IS INSTALLED BY USER

OK -- Continue to next step.

3. IDENTIFY TRANSMITTER CORRESPONDING TO DTC

(a) Set the tire pressure to the appropriate specified values See: Maintenance/Wheels and Tires/Testing and Inspection/Component Tests

and General Diagnostics.

(b) Turn the engine switch off.

(c) Connect Techstream to the DLC3.

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

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

(f) Check the values by referring to the table below.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 651

(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) Check that the connectors are properly connected to the rear seat outer belt assembly RH and center airbag sensor assembly.

OK:

The connectors are properly connected.

HINT

If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the rear seat outer belt assembly RH and center airbag sensor assembly.

(e) Check that the terminals of the connectors are not damaged.

OK:

The terminals are not deformed or damaged.

(f) Check that the floor wire connector (on the rear seat outer belt assembly RH side) is not damaged.

OK:

The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

(g) Check that the short spring for the floor wire with the activation prevention mechanism is not deformed or damaged.

OK:

The short spring is not deformed or damaged.

Text in Illustration

NG -- REPLACE FLOOR WIRE

OK -- Continue to next step.

2. CHECK REAR SEAT OUTER BELT ASSEMBLY RH (REAR PRETENSIONER SQUIB RH)

(a) Connect the connector to the center airbag sensor assembly.

(b) Connect SST (resistance 2.1 Ohms) to connector C.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 773

(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) Check that the connectors are properly connected to the side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag

sensor LH (for front side). Also check that the connectors that link the No. 2 floor wire and front door wire LH are properly connected.

OK:

The connectors are properly connected.

HINT

If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front

side). Also disconnect the connectors that link the No. 2 floor wire and front door wire LH.

(e) Check that the terminals of connectors are not damaged.

OK:

The terminals are not deformed or damaged.

NG -- REPLACE WIRE HARNESS

OK -- Continue to next step.

33. CHECK NO. 2 FLOOR WIRE (OPEN)

(a) Using SST, connect terminals 4 (BCL+) and 3 (BCL-) of connector C.

NOTICE:

Do not forcibly insert SST into the terminals of the connector when connecting.

SST : 09843-18040

(b) 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.

34. CHECK NO. 2 FLOOR WIRE (SHORT)

(a) Disconnect SST from connector C.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 492

(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.

Standard Resistance:

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

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

Standard Resistance:

(h) Check for a short in the circuit.

(1) Release the activation prevention mechanism built into connector B See: Restraints and Safety Systems/Air Bag Systems/Testing

and Inspection/Initial Inspection and Diagnostic Overview/Diagnosis System.

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

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 723

(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 front door wire RH connector from the floor 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.

Standard Voltage:

Text in Illustration

NG -- REPLACE FRONT DOOR WIRE RH

OK -- REPLACE FLOOR WIRE

54. CHECK FRONT DOOR WIRE RH (SHORT TO GROUND)

(a) Disconnect the front door wire RH connector from the floor wire.

(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 169

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

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

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

(f) 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.

(g) Turn the engine switch off.

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

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

Trouble Codes/DTC Check / Clear.

Result:

Text in Illustration

HINT

Codes other than DTC B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

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

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

B -- REPLACE SIDE AIRBAG SENSOR LH

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: B1625/22: Side Airbag Sensor LH Circuit Malfunction

B1625/22 - Side Airbag Sensor LH Circuit Malfunction

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) detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the

airbag should be deployed.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 563

(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 instrument panel 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.

Standard Resistance:

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

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

Standard Resistance:

(h) Check for a short in the circuit.

(1) Release the activation prevention mechanism built into connector B See: Restraints and Safety Systems/Air Bag Systems/Testing

and Inspection/Initial Inspection and Diagnostic Overview/Diagnosis System.

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

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 837

(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 connector from the engine room main 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.

Standard Voltage:

Text in Illustration

NG -- REPLACE INSTRUMENT PANEL WIRE

OK -- REPLACE ENGINE ROOM MAIN WIRE

10. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

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

(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 809

(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 connector from the engine room main 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.

Standard Voltage:

Text in Illustration

NG -- REPLACE INSTRUMENT PANEL WIRE

OK -- REPLACE ENGINE ROOM MAIN WIRE

10. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

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

(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 173

(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 / Trouble Codes.

(e) Read the DTCs.

Result:

NOTICE:

When DTC C2173/73 is output, troubleshoot that DTC first. Then troubleshoot DTCs C2121/21 to C2124/24.

B -- GO TO DTC C2173/73

A -- Continue to next step.

2. CHECK FREQUENCY RECEIVING CONDITION

(a) Check that the vehicle is located in an area such as described below:

(1) Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.

HINT

If the vehicle is located in an area described above, the tire pressure warning light may turn on only in a particular area due to

interfering radio frequencies.

(2) Devices using similar radio frequencies are used in the vehicle.

OK:

Facilities, or devices that use similar radio frequencies are not located in the vicinity of the vehicle.

HINT

Radio transmissions may be interrupted due to the surroundings, or devices installed by the user.

NG -- CHECK IF ANY DEVICE IS INSTALLED BY USER

OK -- Continue to next step.

3. IDENTIFY TRANSMITTER CORRESPONDING TO DTC

(a) Set the tire pressure to the appropriate specified values See: Maintenance/Wheels and Tires/Testing and Inspection/Component Tests

and General Diagnostics.

(b) Turn the engine switch off.

(c) Connect Techstream to the DLC3.

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

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

(f) Check the values by referring to the table below.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 554

(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 instrument panel 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.

Standard Resistance:

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

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

Standard Resistance:

(h) Check for a short in the circuit.

(1) Release the activation prevention mechanism built into connector B See: Restraints and Safety Systems/Air Bag Systems/Testing

and Inspection/Initial Inspection and Diagnostic Overview/Diagnosis System.

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

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 124

(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) Interchange the front airbag sensor LH with RH and connect the connectors.

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

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

(f) 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.

(g) Turn the engine switch off.

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

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

Trouble Codes/DTC Check / Clear.

Result:

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 RH

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: B1610/13: Front Airbag Sensor RH Malfunction

B1610/13 - Front Airbag Sensor RH Malfunction

DESCRIPTION

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

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

deployed.

DTC B1610/13 is recorded when a malfunction is detected in the front airbag sensor RH.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 621

(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) Check that the connectors are properly connected to the front seat outer belt assembly LH and center airbag sensor assembly.

OK:

The connectors are properly connected.

HINT

If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the front seat outer belt assembly LH and center airbag sensor assembly.

(e) Check that the terminals of the connectors are not damaged.

OK:

The terminals are not deformed or damaged.

(f) Check that the No. 2 floor wire connector (on the front seat outer belt assembly LH side) is not damaged.

OK:

The lock button is not disengaged, and the claw of the lock is not deformed or damaged.

(g) Check that the short spring for the No. 2 floor wire with the activation prevention mechanism is not deformed or damaged.

OK:

The short spring is not deformed or damaged.

Text in Illustration

NG -- REPLACE NO. 2 FLOOR WIRE

OK -- Continue to next step.

2. CHECK FRONT SEAT OUTER BELT ASSEMBLY LH (FRONT PRETENSIONER SQUIB LH)

(a) Connect the connector to the center airbag sensor assembly.

(b) Connect SST (resistance 2.1 Ohms) to connector C.