| DTC Code | DTC Name |
|---|---|
| Brake Actuator (Skid Control ECU) Communication Stop Mode |
DESCRIPTION
| Detection Item | Symptom | Trouble Area |
|---|---|---|
| Brake Actuator (Skid Control ECU) Communication Stop Mode | Either condition is met:
|
|
CAUTION / NOTICE / HINT
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Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
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After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
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After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
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DTC check procedure: Turn the engine switch on (IG), wait at least 60 seconds, and then drive the vehicle at a speed of 36 km/h (22 mph) or more for 4.6 seconds or more.
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After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed.
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Inspect the fuses for circuits related to this system before performing the following procedure.
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Operating the engine 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.
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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
- Click here
CHECK FOR OPEN IN CAN BUS LINES (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) BRANCH LINE)
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Disconnect the cable from the negative (-) battery terminal.
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*a Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly))
Disconnect the A15 skid control ECU (brake actuator assembly) connector.
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Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition A15-25 (CANH) - A15-14 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Result Result OK NG
- OKClick here
- NG
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))
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- Click here
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
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*a Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly))
Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition A15-1 (GND1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω A15-13 (GND2) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω -
Reconnect the cable to the negative (-) battery terminal.
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*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 Tester Connection Condition Specified Condition A15-12 (+BS) - Body ground Always 11 to 14 V A15-24 (BM) - Body ground Always 11 to 14 V A15-34 (IG1) - Body ground Engine switch on (IG) 11 to 14 V Result Result OK NG
- OK
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)Click here
- NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
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