Toyota Camry Manual page 856

BR–170
DTC 41 +BS Power Source Circuit
CIRCUIT DESCRIPTION
This is the power source for the ECU, hence the CPU, and the actuators.
Diagnostic Trouble Code Detecting Condition
DTC No.
(1) Voltage of 5V or more, or 9.4V or less, is
(2) Voltage of 5V or more, or 9.4V or less, is
(3) During ABS operation, voltage of 5V or more,
Fail safe function: If trouble occurs in the power source circuit, the ECU cuts off current to the ABS
solenoid relay and prohibits ABS control.
If the voltage applied to terminal +BS becomes 9.9V or less, the warning light goes
off and ABS control becomes possible.
DIAGNOSTIC CHART
Check battery positive voltage.
Check voltage between terminals +BS and GND
of ABS ECU connector.
Check continuity between terminals GND of
ABS ECU connector and body ground.
Check ECU–IG fuse.
Check for open in harness and connector
between ABS ECU and battery.
BRAKE SYSTEM
applied for at least 60 sec. to terminal +BS
before the ABS primary check and ABS
operation.
applied to terminal +BS for 0.2 sec. or more,
after the ABS primary check and before ABS
operation.
or 8.8V or less, is applied to terminal +BS for
0.2 sec. or more.
– ANTI–LOCK BRAKE SYSTEM (ABS)
Trouble area
Battery.
IC regulator.
Open or short in power source circuit.
ECU.
Check and repair the charging system.
Check and replace ABS ECU.
Repair or replace harness or
connector.
Check for short in all the harness and
components connected to ECU–IG
fuse (See attached wiring diagram).