Toyota RAV4 (XA40) 2013-2018 Service Manual: Low battery positive voltage
Description
When there is an abnormality in the power supply circuit of the brake actuator (skid control ecu), the skid control ecu sets a dtc and the operation is prohibited by the fail-safe function. This dtc is set when the voltage supplied to terminal ig1 is outside the dtc detection threshold, due to abnormalities of the battery, power source circuits or charging circuits such as the alternator circuit.
The fail-safe function is canceled when the voltage to terminal ig1 returns to normal.
Wiring diagram
Inspection procedure
- Inspect fuse (ecu-ig1)
- Remove the ecu-ig1 fuse from the instrument panel junction block.
- Measure the resistance of the fuse.
Standard resistance:
below 1 
- Inspect battery
- Check the battery voltage.
Standard voltage: 11 to 14 v
- Check wire harness (skid control ecu - battery)
- Disconnect the a19 ecu connector.
- Measure the voltage of the wire harness side connector.
Standard voltage 
- Check wire harness (skid control ecu - body ground)
- Disconnect the a19 ecu connector.
- Measure the resistance of the wire harness side connector.
Standard resistance 
- Reconfirm dtc
- Clear the dtc (see page bc-47).
- Drive the vehicle at 3 km/h (2 mph) or more for several seconds.
- Check if the same dtc is output (see page bc-47).
Result 
Replace abs and traction actuator assembly
Stuck in deceleration sensor
Description
The skid control ecu receives signals from the yaw rate and deceleration
sensor via the can
communication system.
The yaw rate sensor has a built-in deceleration sensor and dete ...
Master cylinder pressure sensor malfunction
Description
The master cylinder pressure sensor is connected to the skid control ecu in
the abs and traction
actuator.
Dtc c1281/81 can be detected when the master cylinder pressure sensor ...
Other materials:
Check for intermittent problems
Check for intermittent problems
Hint:
A momentary interruption (open circuit) in the connectors
and/or wire harness between the sensors and ecus can
be detected by using the ecu data list function of an
intelligent tester.
Turn the ignition switch off and connect the
intelligent test ...
Terminals of ecu
Check combination meter assembly
Disconnect the e19 meter connector.
Measure the voltage and resistance of the wire
harness side connector.
If the result is not as specified, there may be a
malfunction on the wire harness side.
Check heater control panel (for automat ...
Ignition coil
Description
Hint:
These dtcs indicate malfunctions relating to the primary circuit.
If dtc p0351 is set, check no. 1 Ignition coil with igniter circuit.
If dtc p0352 is set, check no. 2 Ignition coil with igniter circuit.
If dtc p0353 is set, check no. 3 Ignition coil with igniter cir ...
