RX 350 FWD V6-3.5L (2GR-FE) (2010)
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2008 / 2009 ES 350:
General - Identification - "How to Troubleshoot ECU Controlled Systems: Electronic Circuit Inspection Procedure"
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2007 / 2008 / 2009 / 2010 RX 350:
General - Introduction - "How to Troubleshoot ECU Controlled Systems: Electronic Circuit Inspection Procedure"
1. Check all DTCs.
Are DTC(s) other than P0138 or P0158 present?
Yes:
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P2195 and/or P2197 DTC also present: Go to step 3.
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P0606 DTC also present: Go to step 4.
No:
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Go to step 2.
2. Check the A/F and 02 sensor values for the appropriate bank DTC Freeze Frame Data (FFD). Is the AFS Voltage B#S1 = 3.35~3.70V AND the 02S
B#S2 = 0.70~0.90V?
Yes:
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Replace the appropriate bank Air Fuel Ratio Sensor ONLY (NOT 02 Sensor) to correct the P0138 or P0158 DTC condition.
No:
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Inspect the 02 B#S2 circuit for open short or high resistance. If no trouble is found refer to TIS applicable model and model year Repair Manual
for P0138/P0158 diagnosis:
2007 / 2008 / 2009 / 2010 ES350:
Engine/Hybrid System - Engine Control - SFI System - "2GR-FE Engine Control System: SFI System: Diagnosis System"
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2007 / 2008 / 2009 / 2010 (to 08/2009) RX350:
Engine/Hybrid System - Engine Control - SFI System - "2GR-FE Engine Control System: SFI System: Diagnosis System"
3. Inspect Air Fuel Ratio Sensor for the appropriate bank.
Does the Air Fuel Ratio Sensor have an open or short on the A1A+ or A1A- wires?
Yes:
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Repair the harness and revaluate the Air Fuel Ratio Sensor operation. Confirm the previous DTC(s) do not reset.
No:
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Replace the applicable bank Air Fuel Ratio Sensor ONLY to correct the P2195/P0138 or P2197/P0158 DTC condition. Test drive the vehicle to
confirm none of the previous DTC(s) reset.
4. Inspect Oxygen Sensor 2 Freeze Frame Data (FFD) values.
Is the 02S B#S2 voltage more than 1.10v and/or the 02S Impedance B#S2 more than 300 ohms when engine is at normal operating temperature?
Yes:
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Inspect 02 B#S2 circuit for open short or high resistance. If no harness issues are found replace the appropriate bank 02 Sensor ONLY to correct
the P0606 DTC.
No:
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Follow the Repair Manual diagnostic procedure for P0138/P0158 DTC:
