Toyota RAV4 manuals

Toyota Sienna Service Manual: System Voltage

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.

System Voltage

HINT:

If DTC P0560 is set, the ECM does not store other DTCs.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

WIRING DIAGRAM

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)

CHECK FUSE (EFI NO. 1 FUSE)

(a) Remove the EFI No. 1 fuse from the engine room junction block.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance: Below 1 Ω

(c) Reinstall the EFI No. 1 fuse.

2 INSPECT ECM (BATT VOLTAGE)

INSPECT ECM (BATT VOLTAGE)

(a) Measure the voltage according to the value(s) in the table below.

Standard voltage

REPLACE ECM (See page ES-498)

3 CHECK HARNESS AND CONNECTOR (ECM - EFI NO. 1 FUSE)

CHECK HARNESS AND CONNECTOR (ECM - EFI NO. 1 FUSE)

(a) Check the harness and the connector between the EFI No. 1 fuse and ECM.

(1) Remove the EFI No. 1 fuse from the engine room junction block.

(2) Disconnect the E4 ECM connector.

(3) Measure the resistance according to the value(s) in the table below.

Standard resistance :

(4) Reconnect the ECM connector.

(5) Reinstall the EFI No. 1 fuse.

4 CHECK HARNESS AND CONNECTOR (EFI NO. 1 FUSE - BATTERY)

CHECK HARNESS AND CONNECTOR (EFI NO. 1 FUSE - BATTERY)

(a) Check the harness and the connector between the EFI No. 1 fuse and battery.

(1) Remove the EFI No. 1 fuse from the engine room junction block.

(2) Disconnect the negative battery cable.

(3) Measure the resistance according to the value(s) in the table below.

Standard resistance:

(4) Reconnect the negative battery cable.

(5) Reinstall the EFI No. 1 fuse

5 INSPECT BATTERY

(a) Check that the battery is not depleted.

CHECK AND REPLACE ENGINE ROOM RELAY BLOCK

Cold Start Ignition Timing Performance
DESCRIPTION This monitor will run when the engine is started at -10 to 50°C (14 to 122°F) of the engine coolant temperature. The DTC will set after the engine idling for 13 seconds (2 trip ...

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 the throttle actuator. This self-check ensures that the ECM is ...

Other materials:

Summary of functions
Dynamic radar cruise control supplements conventional cruise control with a vehicle-to-vehicle distance control. In vehicle-to-vehicle distance control mode, the vehicle automatically accelerates or decelerates in order to maintain a set following distance from vehicles ahead. Multi-infor ...

Reassembly
1. INSTALL POWER SLIDE DOOR TOUCH SENSOR LH Install the touch sensor with the 4 screws. Connect the connector. Fix the wire harness inside the door panel with the clip. 2. INSTALL REAR DOOR WIRE SUB-ASSEMBLY LH Install the wire. NOTICE: When installing the wire, push the ...

Steering Angle Sensor Zero Point Malfunction
DTC C1290/66 Steering Angle Sensor Zero Point Malfunction DESCRIPTION The skid control ECU acquires steering angle sensor zero point every time the ignition switch is turned to the ON position and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The ECU also sto ...

© 2011-2024 Copyright www.tsienna.net