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:
Operation check
1. DETECTION RANGE MEASUREMENT AND INDICATOR CHECK
Turn the IG switch ON.
Move the shift lever to the R position (when the back
sonar and rear clearance sonar is checked).
With front clearance sonar:
Move the shift lever to the N position (when the front
clearance son ...
EVAP System
RELATED DTCS
If any EVAP system DTCs are set, the malfunctioning area can be determined
using the table below.
NOTICE:
If the 0.02 inch reference pressure difference between the first and
second checks is greater than
the specification, the DTCs corresponding to the refe ...
Illumination Circuit
DESCRIPTION
The Multiplex network body ECU controls illumination light as shown in the
chart below.
Room light assembly (Interior light, luggage component light) and
courtesy light with DOOR position
Map light assembly (Personal light)
Transponder key amplifier (Ignition ke ...
