Toyota Tundra. Manual — part 1240

Sensor voltage detection monitor (Lean side malfunction P2195, P2197)

TYPICAL ENABLING CONDITIONS

Sensor voltage detection monitor (Rich side malfunction P2196, P2198)

TYPICAL ENABLING CONDITIONS

Sensor current detection monitor (P2195, P2196, P2197, P2198)

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

Sensor voltage detection monitor (Lean side malfunction P2195, P2197)

TYPICAL MALFUNCTION THRESHOLDS

Monitor runs whenever following DTCs not
present

Sensor 2)
P0102, P0103 (MAF meter)
P0110, P0112, P0113 (IAT sensor)
P0115 - P0118 (ECT sensor)
P0120 - P0223, P2135 (TP sensor)
P0125 (Insufficient ECT for closed loop)
P0136, P0156 (O2 Sensor - Sensor 2)
P0171, P0172, P0174, P0175 (Fuel system)
P0300 - P0306 (Misfire)
P0335 (CKP sensor)
P0340 (VVT sensor)
P0455, P0456 (EVAP system)
P0500 (VSS)

Time after engine start

30 seconds or more

A/F sensor status

Activated

Fuel system status

Closed-loop

Time after engine start

30 seconds or more

A/F sensor status

Activated

Fuel system status

Closed-loop

Battery voltage

11 V or more

Atmospheric pressure

76 kPa (570 mmHg) or higher

Air-fuel ratio sensor status

Activated

Engine coolant temperature

75°C (167°F) or more

Continuous time of fuel cut

3 to 10 seconds

Rear HO2 sensor voltage

Rises from less than 0.21 V to 0.59 V or more

A/F sensor voltage

More than 3.8 V

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Sensor voltage detection monitor (Rich side malfunction P2196, P2198)

TYPICAL MALFUNCTION THRESHOLDS

Sensor current detection monitor (High side malfunction P2195, P2197)

TYPICAL MALFUNCTION THRESHOLDS

Sensor current detection monitor (Low side malfunction P2196, P2198)

TYPICAL MALFUNCTION THRESHOLDS

MONITOR RESULT

Refer to CHECKING MONITOR STATUS .

WIRING DIAGRAM

Rear HO2 sensor voltage

Falls from 0.59 V or more to less than 0.21 V

A/F sensor voltage

Less than 2.8 V

Air-fuel ratio sensor current during fuel cut

3.6 mA or more

Air-fuel ratio sensor current during fuel cut

Less than 1.4 mA

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 202: Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1) - Wiring Diagram

CONFIRMATION DRIVING PATTERN

HINT:

This confirmation driving pattern is used in the "PERFORM CONFIRMATION DRIVING PATTERN"
procedure of the following diagnostic troubleshooting procedure.

CAUTION: Strictly observe posted speed limits, traffic laws, and road conditions

when performing these drive patterns.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 203: Vehicle Speed Driving Pattern (1 Of 2)

Fig. 204: Vehicle Speed Driving Pattern (2 Of 2)

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the Techstream ON.

d. Clear DTCs (See DTC CHECK/CLEAR ).

e. Start the engine, and warm it up until the ECT reaches 75°C (167°F) or higher.

f. Enter the following menus to check the fuel-cut status: Powertrain/Engine and ECT/Data List/All

Data/Idle Fuel Cut.

g. Drive the vehicle at between 38 mph (60 km/h) and 75 mph (120 km/h) for at least 10 minutes.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra