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:
Active test
Hint:
Performing an active test enables components
including the relays, vsv (vacuum switching valve) and
actuators, to be operated without removing any parts.
The active test can be performed with the intelligent
tester. Performing the active test as the first step of
troubleshooting is one ...
Replacement
Replace timing chain cover oil seal
Hint:
There are 2 methods to replace the oil seal.
If the timing chain cover is removed from the
cylinder block:
Using a screwdriver and hammer, tap out the
oil seal.
Apply multi-purpose grease to the lip of a new
oil seal.
Notice:
...
Installation
Hint:
Use the same procedures for the rh side and lh side.
The procedures listed below are for the lh side.
When installing the moulding, heat the vehicle body and
moulding using a heat light.
Standard heating temperature
Notice:
Do not heat the vehicle body and moulding
excessively ...
