DESCRIPTION
Detection Item | Symptom | Trouble Area |
---|---|---|
Brake Actuator (Skid Control ECU) Communication Stop Mode | Either condition is met:
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
Turn the ignition switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
Turn the ignition switch off before inspecting CAN bus wires for a ground short.
After the ignition switch is turned off, check that the key reminder warning system are not operating.
Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.
Tech Tips
Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
PROCEDURE
SYSTEM CHECK
Check the vehicle specifications.
Result | Proceed to |
---|---|
for TMC Made | A |
for TMMF Made | B |
B |
CHECK FOR OPEN IN CAN BUS WIRE (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH WIRE) Click here |
A |
CHECK FOR OPEN IN CAN BUS WIRE (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH WIRE)
*A | except LHD with CVT |
*B | for LHD with CVT |
*a | Front view of wire harness connector (to skid control ECU (brake actuator assembly)) |
Disconnect the A54*1 or A56*2 skid control ECU (brake actuator assembly) connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
*1 : except LHD with CVT
*2 : for LHD with CVT
NG |
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH WIRE) |
OK |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
*A | except LHD with CVT |
*B | for LHD with CVT |
*a | Front view of wire harness connector (to skid control ECU (brake actuator assembly)) |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
*1 : except LHD with CVT
*2 : for LHD with CVT
Result | Proceed to |
---|---|
NG | A |
OK (for LHD) | B |
OK (for RHD) | C |
A |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
B |
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here |
C |
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here |
CHECK FOR OPEN IN CAN BUS WIRE (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH WIRE)
*A | for LHD with CVT and RHD |
*B | except LHD with CVT |
*a | Front view of wire harness connector (to skid control ECU (brake actuator assembly)) |
Disconnect the A78*1 or A79*2 skid control ECU (brake actuator assembly) connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
*1 : for LHD with CVT and RHD
*2 : except LHD with CVT
NG |
REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH WIRE) |
OK |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
*A | for LHD with CVT and RHD |
*B | except LHD with CVT |
*a | Front view of wire harness connector (to skid control ECU (brake actuator assembly)) |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
*1 : for LHD with CVT and RHD
*2 : except LHD with CVT
Result | Proceed to |
---|---|
NG | A |
OK (for LHD) | B |
OK (for RHD) | C |
A |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
B |
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here |
C |
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here |