Toyota Tundra. Manual — part 1130

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

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

minutes.

7. Change the transmission to 2nd gear.

8. Accelerate the vehicle to 40 mph (64 km/h) or more by depressing the accelerator pedal for at

least 10 seconds.

9. Soon after performing step (8) above, release the accelerator pedal for at least 4 seconds

without depressing the brake pedal, in order to execute fuel-cut control.

10. Allow the vehicle to decelerate until the vehicle speed declines to less than 6 mph (10 km/h).

11. Repeat steps from (8) through (10) above at least 3 times in one driving cycle.

c. Monitor Status

1. Check the Readiness Monitor status displayed on the Techstream.

2. If the status does not switch to Complete, make sure that the preconditions have been met,

and then perform steps from (5) through (11) in Drive Pattern above.

5. AIR-FUEL RATIO (A/F) AND HEATED OXYGEN (HO2) SENSOR HEATER MONITORS

(FRONT A/F AND REAR HO2 SENSOR TYPE)

Fig. 15: Readiness Monitor Drive Pattern - Air-Fuel Ratio & Heated Oxygen (HO2) Sensor Heater
Monitors

a. Preconditions

The monitor will not run unless:



The MIL is OFF.

b. Drive Pattern

1. Connect the Techstream to the DLC3.

2. Turn the ignition switch ON.

3. Turn the Techstream ON.

2008 Toyota Tundra

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

4. Clear DTCs (if set) (See DTC CHECK/CLEAR ).

5. Start the engine.

6. Allow the engine to idle for 10 minutes or more.

7. Drive the vehicle at 25 mph (40 km/h) or more for at least 2 minutes.

c. Monitor Status

1. Check the Readiness Monitor status displayed on the Techstream.

If the status does not switch to Complete, make sure that the preconditions have been met,
and repeat steps (5) to (7) described in the Drive Pattern above.

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking
the suspected areas in the order they are listed. Replace parts as necessary.

SFI system

PROBLEM SYMPTOMS REFERENCE

Symptom

Suspected Area

Reference

Engine does not crank (Does not
start)

Battery

ON-VEHICLE INSPECTION

Starter (for 1.6 kW Type)

INSPECTION

Starter (for 2.0 kW Type)

INSPECTION

Starter relay

STARTER RELAY

Park/neutral position switch

INSPECTION

No initial combustion (Does not
start)

ECM power source circuit

ECM POWER SOURCE
CIRCUIT

Crankshaft position sensor

CRANKSHAFT POSITION
SENSOR

VVT sensor

DTC P0340 CAMSHAFT
POSITION SENSOR CIRCUIT
MALFUNCTION; DTC P0342
CAMSHAFT POSITION
SENSOR "A" CIRCUIT LOW
INPUT (BANK 1 OR SINGLE
SENSOR); DTC P0343
CAMSHAFT POSITION
SENSOR "A" CIRCUIT HIGH
INPUT (BANK 1 OR SINGLE
SENSOR); DTC P0345
CAMSHAFT POSITION
SENSOR "A" CIRCUIT (BANK
2); DTC P0347 CAMSHAFT

2008 Toyota Tundra

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

POSITION SENSOR "A"
CIRCUIT LOW INPUT (BANK
2); DTC P0348 CAMSHAFT
POSITION SENSOR "A"
CIRCUIT HIGH INPUT (BANK
2)

Ignition system

ON-VEHICLE INSPECTION

Fuel pump control circuit

FUEL PUMP CONTROL
CIRCUIT

ECM

TERMINALS OF ECM

VC output circuit

VC OUTPUT CIRCUIT

Engine cranks normally but
difficult to start

Fuel pump control circuit

FUEL PUMP CONTROL
CIRCUIT

Compression

ON-VEHICLE INSPECTION

Difficult to start with cold engine

Ignition system

ON-VEHICLE INSPECTION

Spark plug

IGNITION COIL AND SPARK
PLUG

Fuel pump control circuit

FUEL PUMP CONTROL
CIRCUIT

Injector

FUEL INJECTOR

Difficult to start with warm engine

Injector

FUEL INJECTOR

Ignition system

ON-VEHICLE INSPECTION

Spark plug

IGNITION COIL AND SPARK
PLUG

Fuel pump control circuit

FUEL PUMP CONTROL
CIRCUIT

High engine idle speed

Electronic throttle control system THROTTLE BODY
A/C signal circuit (for Automatic
Air Conditioning System)

TERMINALS OF ECU

A/C signal circuit (for Manual
Air Conditioning System)

TERMINALS OF ECU

ECM power source circuit

ECM POWER SOURCE
CIRCUIT

Acoustic Control Induction
System (ACIS)

ACIS CONTROL CIRCUIT

Low engine idle speed (Poor
idling)

Electronic throttle control system THROTTLE BODY
A/C signal circuit (for Automatic
Air Conditioning System)

TERMINALS OF ECU

A/C signal circuit (for Manual
Air Conditioning System)

TERMINALS OF ECU

Fuel pump control circuit

FUEL PUMP CONTROL
CIRCUIT

Air induction system

ON-VEHICLE INSPECTION

Acoustic Control Induction

ACIS CONTROL CIRCUIT

2008 Toyota Tundra

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

System (ACIS)
PCV hose

ON-VEHICLE INSPECTION

Rough idling

Compression

ON-VEHICLE INSPECTION

Spark plug

IGNITION COIL AND SPARK
PLUG

Injector

FUEL INJECTOR

Ignition system

IGNITION COIL AND SPARK
PLUG

Fuel pump control circuit

FUEL PUMP CONTROL
CIRCUIT

Electronic throttle control system THROTTLE BODY
Air induction system

ON-VEHICLE INSPECTION

Acoustic Control Induction
System (ACIS)

ACIS CONTROL CIRCUIT

PCV hose

ON-VEHICLE INSPECTION

Mass air flow meter

MASS AIR FLOW METER

Idle hunting

Electronic throttle control system THROTTLE BODY
Air induction system

ON-VEHICLE INSPECTION

ECM power source circuit

ECM POWER SOURCE
CIRCUIT

Acoustic Control Induction
System (ACIS)

ACIS CONTROL CIRCUIT

Hesitation/Poor acceleration

Fuel pump control circuit

FUEL PUMP CONTROL
CIRCUIT

Spark plug

IGNITION COIL AND SPARK
PLUG

Ignition system

ON-VEHICLE INSPECTION

Injector

FUEL INJECTOR

Mass air flow meter

MASS AIR FLOW METER

Electronic throttle control system THROTTLE BODY
Air induction system

ON-VEHICLE INSPECTION

Compression

ON-VEHICLE INSPECTION

Air Intake Control System
(AICS)

ACIS CONTROL CIRCUIT

Surging (Poor driveability)

Spark plug

IGNITION COIL AND SPARK
PLUG

Fuel pump control circuit

FUEL PUMP CONTROL
CIRCUIT

Ignition system

ON-VEHICLE INSPECTION

Injector

FUEL INJECTOR

Mass air flow meter

MASS AIR FLOW METER

Variable valve timing system

CAMSHAFT OIL CONTROL
VALVE

2008 Toyota Tundra

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