Toyota Sequoia (2005). Manual — part 124
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DIAGNOSTICS
ENGINE
DI–291
485
3
Check air induction system (See page
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
).
DI–292
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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
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
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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
NG
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