Toyota Sequoia (2005). Manual - part 124

–

DIAGNOSTICS

ENGINE

DI–291

485

3

Check air induction system (See page 

SF–1

).

CHECK:
Check for vacuum leaks in air induction system.
OK: 
No leakage.

NG

Repair or replace air induction system.

OK

Check electric throttle control system 
(See page 

SF–39

).

DI–292

–

DIAGNOSTICS

ENGINE

486

DTC

P0560

System Voltage

MONITOR DESCRIPTION

The battery supplies electricity to the ECM even when the ignition switch is OFF. This electricity allows the
ECM to store data such as DTC history, freeze frame data, fuel trim values, and other data.
If the battery voltage falls below a minimum level, the ECM will conclude that there is a fault in the power
supply circuit. The next time the engine starts, the ECM will turn on the MIL and a DTC will be set.

DTC No.

DTC Detecting Condition

Trouble Area

P0560

Open in back up power source circuit

Open in back–up power source circuit

EFI fuse

ECM

HINT:
If DTC P0560 present, the ECM will not store another DTC.

MONITOR STRATEGY

Related DTCs

P0560

System voltage malfunction

Required sensors/components

ECM

Frequency of operation

Continuous

Duration

3 sec.

MIL operation

Immediate (*1)

Sequence of operation

None

*1: The DTC is set immediate. The MIL will be illuminated after the engine starts in the next time.

TYPICAL ENABLING CONDITIONS

It

Specification

Item

Minimum

Maximum

The monitor will run whenever this DTC is
not present

See page 

DI–18

Stand–by RAM

Initialized

TYPICAL MALFUNCTION THRESHOLDS

Detection Criteria

Threshold

Battery voltage

Less than 3.5 V

DICF7–02

A05652

A18100

Battery

2D

EFI No. 1

B–Y

E4

ECM

BATT

7

3

2H

1

IA4

11

B–Y

B

F10
Fusible Link
Block

4

Engine Room J/B

5

B

1

2

–

DIAGNOSTICS

ENGINE

DI–293

487

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:
Read freeze frame data using 

the hand−held tester

. Freeze frame data records the engine conditions when

a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was
running or stopped, if the engine was warmed up or not, if the air–fuel ratio was lean or rich, as well as other
data from the time when a malfunction occurred.

1

Check battery voltage.

PREPARATION:
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch to ON.

(c)

Select the item: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / BATTERY VOLTAGE.

CHECK:
Read the battery voltage on the hand–held tester
RESULT:

Battery voltage

Proceed to

0 V

A

Except 0 V

B

B

Go to step 5.

A

A21381

Engine Room J/B

EFI No. 1 Fuse

B17411

BATT (+)

E6

E4

E1(–)

DI–294

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DIAGNOSTICS

ENGINE

488

2

Check EFI No. 1 fuse of engine room J/B.

PREPARATION:
Remove the EFI No. 1 fuse from the engine room J/B.
CHECK:
Check the resistance of the EFI No. 1 fuse.
OK:

Standard: Below 1 

Ω

NG

Check for short in all harness and components
connected to EFI No. 1 fuse.

OK

3

Check voltage between terminal BATT and E1 of ECM connector.

CHECK:
Measure the voltage between terminals of the E6 and E4 ECM
connector.
OK:

Standard:

Tester Connection

Specified Condition

BATT (E4–3) – E1 (E6–1)

9 to 14 V

OK

Check for intermittent problems
(See page 

DI–11

).

NG