Toyota RAV4 Service Manual: Battery current sensor circuit
Description
The battery current sensor installed on the positive (+) battery terminal detects the amount of current supplied from the generator.
The battery current sensor changes current to voltage (at the positive (+) battery terminal) and sends it to the ecm. The ecm controls the voltage of the generator based on the signals from the battery current sensor.
Wiring diagram
Inspection procedure
Hint:
- If different dtcs that are related to a different system are output simultaneously while terminal e2 is used as a ground terminal, terminal e2 may be open.
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are 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, and other data from the time the malfunction occurred.
- Inspect battery current sensor assembly
- Disconnect the b29 battery current sensor connector.
- Measure the resistance of the battery current sensor.
Standard resistance 
Hint:
The resistance differs according to the tester type.
- Check harness and connector (battery current sensor - ecm)
- Disconnect the b29 battery current sensor connector.
- Disconnect the b30 ecm connectors.
- Measure the resistance of the wire harness side connectors.
Standard resistance (check for open)
Standard resistance (check for short)
Brake switch "b" circuit high
Description
The purpose of this circuit is to prevent the engine from stalling while
driving in the lock-up condition when
the brakes are suddenly applied.
When the brake pedal is depressed ...
Deterioration of battery
Description
The ecm determines the battery power according to the voltage of the batt
terminal while the engine is
running (not cranking).
Inspection procedure
Inspect battery
Inspe ...
Other materials:
Parking brake assembly
Components
Disassembly
Hint:
Use the same procedures for the lh side and rh side.
The procedures listed below are for the lh side.
Remove rear wheel
Disconnect rear disc brake cylinder
mounting lh (see page br-55)
Remove parking brake shoe adjusting
hole plug
Remove t ...
Air fuel ratio sensor
Components
On-vehicle inspection
Check air fuel ratio compensation system
Connect the intelligent tester to the dlc3.
Turn the ignition switch on.
Select the following menu items: data list / a/fs b1
s1 and o2s b1 s2.
Warm up the a/f sensor with the engine speed at
2,500 ...
Ecm communication stop mode (2006/01- )
Description
Wiring diagram
Inspection procedure
Notice:
Turn the ignition switch off before measuring the resistances of the
main wire and branch
wire.
After the ignition switch is turned off, check that the key reminder
warning system and light
reminder warning system ...