Toyota Tundra. Manual — part 1128

b. Write VIN: Explains the VIN writing process in a flowchart. This process allows the VIN to be

input into the ECM. If the ECM is changed, or the ECM VIN and vehicle VIN do not match, the
VIN can be registered, or overwritten in the ECM by following this procedure.

2. READ VIN

a. Confirm the vehicle VIN.

b. Connect the Techstream to the DLC3.

c. Turn the ignition switch ON.

d. Turn the Techstream ON.

e. Enter the following menus: Powertrain/Engine and ECT/Utility/VIN/VIN Read.

3. WRITE VIN

a. Confirm the vehicle VIN.

b. Connect the Techstream to the DLC3.

c. Turn the ignition switch ON.

d. Turn the Techstream ON.

e. Enter the following menus: Powertrain/Engine and ECT/Utility/VIN/VIN Write.

CHECKING MONITOR STATUS

The purpose of the monitor result (mode 06) is to allow access to the results for on-board diagnostic monitoring
tests of specific components/systems that are not continuously monitored. Examples are catalyst, evaporative
emission (EVAP) and thermostat.

The monitor result allows the OBD II scan tool to display the monitor status, test value, minimum test limit and
maximum test limit. These data are displayed after the vehicle has been driven to run the monitor.

When the test value is not between the minimum test limit and maximum test limit, the ECM (PCM) interprets
this as a malfunction. When the component is not malfunctioning, if the difference of the test value and test
limit is very small, the component will malfunction in the near future.

Perform the following instruction to view the monitor status.

Although this instruction reference the Lexus/Toyota diagnostic tester, it can be checked using a generic OBD
II scan tool. Refer to your scan tool operator's manual for specific procedures.

1. PERFORM MONITOR DRIVE PATTERN

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON and the Techstream ON.

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

d. Run the vehicle in accordance with the applicable drive pattern described in READINESS

MONITOR DRIVE PATTERN (See READINESS MONITOR DRIVE PATTERN ). Do not
turn the ignition switch OFF.

NOTE:

The test results will be lost if the ignition switch is turned OFF.

2008 Toyota Tundra

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

2. ACCESS MONITOR RESULT

a. Enter the following menus: Powertrain/Engine and ECT/Monitor/Result. The monitor status

appears after the component name.



Pass: The component is functioning normally.



Fail: The component is malfunctioning.

b. Confirm that the component is either Pass or Fail.

c. Select the component and press ENTER. The accuracy test value appears if the monitor status is

either Pass or Fail.

3. CHECK COMPONENT STATUS

a. Compare the test value with the minimum test limit (MIN LIMIT) and maximum test limit (MAX

LIMIT).

b. If the test value is between the minimum test limit and maximum test limit, the component is

functioning normally. If not, the component is malfunctioning. The test value is usually
significantly higher or lower than the test limit. If the test value is on the borderline of the test limit,
the component will malfunction in the near future.

HINT:

The monitor result might on rare occasions be PASS (Pass) even if the malfunction indicator lamp
(MIL) is illuminated. This indicates the system malfunctioned on a previous driving cycle. This
might be caused by an intermittent problem.

4. MONITOR RESULT INFORMATION

If you use a generic scan tool, multiply the value by the scaling value listed below.

A/F Sensor Bank 1 Sensor 1

MONITOR RESULT INFORMATION

A/F Sensor Bank 2 Sensor 1

MONITOR RESULT INFORMATION

HO2 Sensor Bank 1 Sensor 2

MONITOR RESULT INFORMATION

Monitor ID Test ID

Scaling

Unit

Description

$01

$8E

Multiply by 0.001 V A/F sensor deterioration level

$01

$91

Multiply by 0.004 mA A/F sensor current

Monitor ID Test ID

Scaling

Unit

Description

$05

$8E

Multiply by 0.001 V A/F sensor deterioration level

$05

$91

Multiply by 0.004 mA A/F sensor current

Monitor ID Test ID

Scaling

Unit

Description

2008 Toyota Tundra

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

HO2 Sensor Bank 2 Sensor 2

MONITOR RESULT INFORMATION

Catalyst - Bank 1

MONITOR RESULT INFORMATION

Catalyst - Bank 2

MONITOR RESULT INFORMATION

EVAP

MONITOR RESULT INFORMATION

Rear Oxygen Sensor Heater

MONITOR RESULT INFORMATION

$02

$07

Multiply by 0.001

V Minimum sensor voltage

$02

$08

Multiply by 0.001

V Maximum sensor voltage

$02

$8F

Multiply by 0.0003 g Maximum oxygen storage capacity

Monitor ID Test ID

Scaling

Unit

Description

$06

$07

Multiply by 0.001

V Minimum sensor voltage

$06

$08

Multiply by 0.001

V Maximum sensor voltage

$06

$8F

Multiply by 0.0003 g Maximum oxygen storage capacity

Monitor ID Test ID

Scaling

Unit

Description

$21

$A9

Multiply by 0.0003 No dimension Oxygen storage capacity of catalyst - Bank 1

Monitor ID Test ID

Scaling

Unit

Description

$22

$A9

Multiply by 0.0003 No dimension Oxygen storage capacity of catalyst - Bank 2

Monitor ID Test ID

Scaling

Unit

Description

$3D

$C9

Multiply by 0.001 kPa Test value for small leak (P0456)

$3D

$CA Multiply by 0.001 kPa Test value for gross leak (P0455)

$3D

$CB Multiply by 0.001 kPa Test value for leak detection pump OFF stuck (P2401)

$3D

$CD Multiply by 0.001 kPa Test value for leak detection pump ON stuck (P2402)

$3D

$CE

Multiply by 0.001 kPa Test value for vent valve OFF stuck (P2420)

$3D

$CF

Multiply by 0.001 kPa Test value for vent valve ON stuck (P2419)

$3D

$D0

Multiply by 0.001 kPa Test value for reference orifice low flow (P043E)

$3D

$D1

Multiply by 0.001 kPa Test value for reference orifice high flow (P043F)

$3D

$D4

Multiply by 0.001 kPa Test value for purge VSV close stuck (P0441)

$3D

$D5

Multiply by 0.001 kPa Test value for purge VSV open stuck (P0441)

$3D

$D7

Multiply by 0.001 kPa Test value for purge flow insufficient (P0441)

2008 Toyota Tundra

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

Secondary Air Injection (AIR) - Bank 1

MONITOR RESULT INFORMATION

Secondary Air Injection (AIR) - Bank 2

MONITOR RESULT INFORMATION

Misfire

MONITOR RESULT INFORMATION

Monitor ID Test ID

Scaling

Unit

Description

$42

$91

Multiply by 0.001 Ohm Oxygen sensor heater resistance bank 1 sensor 2

$46

$91

Multiply by 0.001 Ohm Oxygen sensor heater resistance bank 2 sensor 2

Monitor ID Test ID

Scaling

Unit

Description

$71

$E1

Multiply by 0.01 g/sec. Test value for AIR Insufficient

$71

$E2

Multiply by 0.01 kPa Test value for AIR pump ON stuck

$71

$E3

Multiply by 0.01 kPa Test value for AIR pump OFF stuck

$71

$E4

Multiply by 0.01 kPa Test value for AIR valve(s) ON stuck

$71

$E5

Multiply by 0.01 kPa Test value for AIR valve(s) OFF stuck

Monitor ID Test ID

Scaling

Unit

Description

$72

$E1

Multiply by 0.01 g/sec. Test value for AIR insufficient

$72

$E2

Multiply by 0.01 kPa Test value for AIR pump ON stuck

$72

$E3

Multiply by 0.01 kPa Test value for AIR pump OFF stuck

$72

$E4

Multiply by 0.01 kPa Test value for AIR valve(s) ON stuck

$72

$E5

Multiply by 0.01 kPa Test value for AIR valve(s) OFF stuck

Monitor

ID

Test

ID

Scaling

Unit

Description

$A1

$0B

Multiply

by 1

Time

Total EWMA misfire count of all cylinders in last ten driving cycles
EWMA: Exponential Weighted Moving Average

$A1

$0C

Multiply

by 1

Time



When ignition switch is ON, total misfire count of all
cylinders in last driving cycle is displayed.



While engine is running, total misfire count of all cylinders in
current driving cycle is displayed.

$A2

$0B

Multiply

by 1

Time Total EWMA misfire count of cylinder 1 in last ten driving cycles

$A2

$0C

Multiply

by 1

Time



When ignition switch is ON, total misfire count of cylinder 1
in last driving cycle is displayed.



While engine is running, total misfire count of cylinder 1 in
current driving cycle is displayed.

$A3

$0B

Multiply

by 1

Time Total EWMA misfire count of cylinder 2 in last ten driving cycles

2008 Toyota Tundra

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