Toyota Tundra. Manual — part 1595

f. Enter the following menus Powertrain/Engine and ECT/Trouble Codes/Pending.

g. Read DTCs.

Result

DTC OUTPUT RESULT

HINT

If the engine does not start, replace the ECM.

B: REPLACE ECM (See REMOVAL )

A: END

DTC P1607 CRUISE CONTROL INPUT PROCESSOR

DESCRIPTION

The ECM continuously monitors its main and sub CPUs. This self-check ensures that the ECM is functioning
properly. If outputs from the CPUs are different and deviate from the standard, the ECM will illuminate the
MIL and store a DTC immediately.

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

Result

Proceed to

No DTC is output

A

P1340, P1342 and/or P1343 are output

B

DTC

DTC Detection Condition

Trouble Area

P1607

ECM CPUs malfunction

ECM

Related DTC

P1607 Internal control module range check

Required sensors/Components (main)

ECM

Required sensors/Components (sub)

Cruise control

Frequency of Operation

Continuous

Duration

0.3 seconds

MIL Operation

Immediate

Sequence of Operation

None

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS CONDITIONS

INSPECTION PROCEDURE

1. CHECK DTC

a. Clear DTC (see DTC CHECK/CLEAR ).

b. Turn the ignition switch off.

c. Disconnect the cable from the negative battery terminal and wait for 1 minute.

d. Connect the cable to the negative battery terminal.

e. Turn the ignition switch to ON.

f. Check DTC.

OK:

P1607 is not present.

NG: REPLACE ECM (See REMOVAL )

OK: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT
PROBLEMS )

DTC P1613 SECONDARY AIR INJECTION DRIVER MALFUNCTION; DTC P1614 SECONDARY
AIR INJECTION SYSTEM DRIVER BANK 2

DESCRIPTION

Refer to DTC P0412 .

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

Monitor runs whenever the following DTCs are not present

None

Cruise control

Forbiddance

When either condition below is met

-

Cruise control

Operating

Low speed control

Operating

DTC

DTC Detection Condition

Trouble Area

Either of following conditions (1)
or (2) met

1. All of following conditions

met (1 trip detection logic)



Either of air pump or

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

MONITOR DESCRIPTION

For a short time after cold engine starts, the ECM transmits command signals to the Air Injection Control
Driver (AID) to drive the air pump and the Air Switching Valve (ASV). The AID detects open and short circuits
according to the voltages at the AID terminals to the air pump and ASV, and the circuit voltage of the AID
power source, and transmits diagnostic information as a signal to the ECM.

If the Secondary Air Injection (AIR) system circuit or the AID itself malfunctions, the AID sends a malfunction
signal (duty signal) as diagnostic information to the ECM (when the system is normal, a system normal signal is
sent). The ECM sets the DTC based on the diagnostic information from the AID. EXAMPLE

P1613
P1614

air switching valve not
operating



Diagnostic signal from
Air Injection Control
Driver (AID) 80%



Battery voltage 8 V or
more

2. Both of following conditions

met (1 trip detection logic)



Battery voltage 8 V or
more



Diagnostic signal from
AID abnormal (duty
signal other than 0, 20,
40, 80 and 100%)



AID



Open in AID ground circuit

P1613
P1614

All of following conditions met (1
trip detection logic)

a. Air injection system

operating (Air Switching
Valve [ASV] ON and air
pump ON)

b. Diagnostic signal from Air

Injection Control Driver
(AID) 0%

c. Battery voltage 8 V or more



Short in diagnostic
information signal circuit
(AID - ECM)



Open or short in air pump
and air switching valve
command signal circuit
(AID - ECM)



Open in AID ground circuit



AID



ECM

P1613
P1614

Both of following conditions met (1
trip detection logic)

a. Battery voltage 8 V or more

b. Diagnostic signal from Air

Injection Control Driver
(AID) 100%



Open or short in AID +B
circuit



Open in diagnostic
information signal circuit
(AID - ECM)



AID



ECM

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

1. The duty ratio of the diagnostic signal from the AID is 0 or 100% (remains at 0 V or the same as battery

voltage).

2. The duty ratio of the diagnostic signal from the AID shows an impossible ratio (other than 0, 20, 40, 80

and 100%).

3. The AID outputs the normal signal (normal duty signal 80%) while the system is not operating.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

Case 1 and 4:

TYPICAL ENABLING CONDITIONS - CASE 1 AND 4

Case 2:

TYPICAL ENABLING CONDITIONS - CASE 2

Case 3:

Related DTCs

P1613 Secondary air injection system air injection control driver
circuit range check
P1614 Secondary air injection system air injection control driver
circuit range check

Required Sensors/Components

Main)

Air injection control driver

Required Sensors/Components

Related)

Air switching valve

Frequency of Operation

Once per drive cycle

Duration

3 seconds

MIL Operation

mmediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

Battery voltage

8 V or more

gnition switch

ON

Starter

OFF

Monitor runs whenever following DTCs not present

None

Either a or b met

-

a. Air pump

Not operating

b. Air switching valve

Not operating

Battery voltage

8 V or more

gnition switch

ON

Starter

OFF

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra