Toyota Sienna Service Manual: System Voltage
DTC P0560 System Voltage
MONITOR DESCRIPTION
The battery supplies electricity to the ECM even when the ignition switch is off. This power allows the ECM to store data such as DTC history, freeze frame data and fuel trim values. If the battery voltage falls below a minimum level, these memories are cleared and the ECM determines that there is a malfunction in the power supply circuit. When the engine is next started, the ECM illuminates the MIL and sets the DTC.
HINT: If DTC P0560 is set, the ECM does not store other DTCs.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1 CHECK FUSE (EFI NO. 1 FUSE)
- Remove the EFI No. 1 fuse from the engine room junction block.
- Measure the resistance according to the value(s) in the
table below.
Standard resistance: Below 1 Ω
- Reinstall the EFI No. 1 fuse.
2 INSPECT ECM (BATT VOLTAGE)
- Measure the voltage according to the value(s) in the table below.
Standard voltage
REPLACE ECM
3 CHECK HARNESS AND CONNECTOR (ECM - EFI NO. 1 FUSE)
- Check the harness and the connector between the EFI No. 1 fuse and ECM.
- Remove the EFI No. 1 fuse from the engine room junction block.
- Disconnect the E4 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance : Check for open
Check for short
- Reconnect the ECM connector.
- Reinstall the EFI No. 1 fuse.
4 CHECK HARNESS AND CONNECTOR (EFI NO. 1 FUSE - BATTERY)
- Check the harness and the connector between the EFI No. 1 fuse and battery.
- Remove the EFI No. 1 fuse from the engine room junction block.
- Disconnect the negative battery cable.
- Measure the resistance according to the value(s) in the table below.
Standard resistance: Check for open
Check for short
- Reconnect the negative battery cable.
- Reinstall the EFI No. 1 fuse.
5 INSPECT BATTERY
- Check that the battery is not depleted.
CHECK AND REPLACE ENGINE ROOM RELAY BLOCK
Cold Start Ignition Timing Performance
DTC P050B Cold Start Ignition Timing Performance
DESCRIPTION
This monitor will run when the engine is started at -10 to 50C (14 to 122F)
of the engine coolant
temperature. The DTC will set after ...
Internal Control Module Random Access Memory
(RAM) Error
DTC P0604 Internal Control Module Random Access Memory
(RAM) Error
DESCRIPTION
The ECM continuously monitors its own internal memory status, internal
circuits, and output signals
transmitted to ...
Other materials:
Noise Occurs
INSPECTION PROCEDURE
1 NOISE CONDITION
Check in which direction the noise comes from (front left
or right, or rear left or right).
Check in which direction the noise comes from.
OK:
The location of the noise source can be
determined
2 CHECK SPEAKERS
Check the installation cond ...
Opening and closing
Front moon roof
Vehicles without a rear moon
roof
Vehicles with a rear moon roof
Opens the moon roof*
The moon roof will stop at the tilt up position once.
To tilt down, press the opposite side of the switch.
Press the switch again to open.
Closes the moon roof*
...
A/F Sensor Circuit Slow Response
HINT:
DTC P2A00 indicates malfunctions related to the bank 1 A/F sensor.
DTC P2A03 indicates malfunctions related to the bank 2 A/F sensor.
Bank 1 refers to the bank that includes cylinder No. 1.
Bank 2 refers to the bank that includes cylinder No. 2.
Sensor 1 refers to the sensor mo ...
