TERMINALS OF ECU
CHECK SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)
*a |
Component without harness connected (Skid Control ECU (Brake Actuator Assembly)) |
- |
- |
(a) Disconnect the A42 skid control ECU (brake actuator assembly) connectors.
(b) Measure the voltage and resistance according to the value (s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
A42-30 (+BS) - Body ground |
W |
Parking brake motor (parking brake actuator assembly) power supply |
Always |
11 to 14 V |
A42-36 (IG1) - Body ground |
B |
IG power supply |
Ignition switch ON |
11 to 14 V |
A42-46 (GND1) - Body ground |
W-B |
Ground |
Always |
Below 1 Ω |
A42-14 (GND2) - Body ground |
W-B |
Ground |
Always |
Below 1 Ω |
A42-2 (MRR+) - Body ground |
B |
Parking brake motor RH (parking brake actuator assembly RH) (+) |
- |
- |
A42-3 (MRR-) - Body ground |
B |
Parking brake motor RH (parking brake actuator assembly RH) (-) |
- |
- |
A42-13 (MRL+) - Body ground |
R |
Parking brake motor LH (parking brake actuator assembly LH) (+) |
- |
- |
A42-12 (MRL-) - Body ground |
L |
Parking brake motor LH (parking brake actuator assembly LH) (-) |
- |
- |
A42-35 (POL) - Body ground |
V |
Electric parking brake switch indicator light |
- |
- |
A42-31 (SWI1) - Body ground |
B |
Electric parking brake switch (electric parking brake switch assembly) |
- |
- |
A42-15 (SWI2) - Body ground |
LG |
Electric parking brake switch (electric parking brake switch assembly) |
- |
- |
A42-32 (SWO1) - Body ground |
P |
Electric parking brake switch (electric parking brake switch assembly) |
- |
- |
A42-16 (SWO2) - Body ground |
L |
Electric parking brake switch (electric parking brake switch assembly) |
- |
- |
Toyota CH-R Service Manual > Vehicle Stability Control System: Brake Warning Light Remains ON
DESCRIPTION
The skid control ECU (brake actuator assembly) is connected to the combination
meter assembly via CAN communication.
If any of the following is detected, the brake system warning light (red indicator)
remains on:
The skid control ECU (brake actuator assembly) connector is d ...
Toyota CH-R Service Manual > Can Communication System: Open in Bus 3 Main Bus Line
DESCRIPTION
There may be an open circuit in one of the CAN main bus lines when the resistance
between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway
ECU) is 70 Ω or higher.
Symptom
Trouble Area
Resistance between terminals 6 ...