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:

Identification of noise source
1. Radio Description Radio frequency band  Radio broadcasts use the radio frequency bands shown in the table below Service area The service areas of AM and FM broadcasts are vastly different. Sometimes an AM broadcast can be received very clearly but an FM st ...

Diagnosis system
1. CHECK DLC3  The vehicle's ECU uses ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format. NOTICE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not ...

Unlocking and locking the doors from the outside
Entry function (vehicles with a smart key system) Carry the electronic key to enable this function. Grip the driver’s door handle to unlock the door. Grip the passenger’s door handle to unlock all the doors.* Make sure to touch the sensor on the back of the handle. The doors ...

© 2011-2020 Copyright www.tsienna.net