Can Communication System Skid Control Ecu Communication Stop Mode
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK CAN BUS WIRE FOR DISCONNECTION (SKID CONTROL ECU BRANCH WIRE)
CHECK HARNESS AND CONNECTOR (IG1, GND1)
CHECK DTC OUTPUT
CAN COMMUNICATION SYSTEM - Skid Control ECU Communication Stop Mode |
DESCRIPTION
Detection Item
| Symptom
| Trouble Area
|
Skid Control ECU Communication Stop Mode
| - "ABS/VSC/TRAC" is not displayed on the "CAN Bus Check" screen of the Techstream
- Applies to "Skid Control ECU Communication Stop Mode" in "DTC Combination Table"
| - Power source circuit of skid control ECU
- Skid control ECU branch wire or connector
- Skid control ECU
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Turn the ignition switch off before measuring the resistance between main CAN bus wires and CAN Bus branch wires.
- After the ignition switch is turned off, check that the key reminder warning system and light 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 the connectors, open the doors and leave them open.
- HINT:
- 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.
| 1.CHECK CAN BUS WIRE FOR DISCONNECTION (SKID CONTROL ECU BRANCH WIRE) |
Turn the ignition switch off.
Text in Illustration*A
| w/o VSC
|
*B
| w/ VSC
|
*a
| Front view of wire harness connector
(to Skid Control ECU with Actuator)
|
Disconnect the skid control ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- w/o VSC:
Tester Connection
| Switch Condition
| Specified Condition
|
A51-25 (CANH) - A51-14 (CANL)
| Ignition switch off
| 54 to 69 Ω
|
- w/ VSC:
Tester Connection
| Switch Condition
| Specified Condition
|
A66-25 (CANH) - A66-14 (CANL)
| Ignition switch off
| 54 to 69 Ω
|
| | REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (SKID CONTROL ECU BRANCH WIRE) |
|
|
| 2.CHECK HARNESS AND CONNECTOR (IG1, GND1) |
Disconnect the skid control ECU connector.
Text in Illustration*A
| w/o VSC
|
*B
| w/ VSC
|
*a
| Front view of wire harness connector
(to Skid Control ECU with Actuator)
|
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- w/o VSC:
Tester Connection
| Condition
| Specified Condition
|
A51-1 (GND1) - Body ground
| Always
| Below 1 Ω
|
- w/ VSC:
Tester Connection
| Condition
| Specified Condition
|
A66-1 (GND1) - Body ground
| Always
| Below 1 Ω
|
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
- w/o VSC:
Tester Connection
| Switch Condition
| Specified Condition
|
A51-34 (IG1) - Body ground
| Ignition switch ON
| 10 to 14 V
|
- w/ VSC:
Tester Connection
| Switch Condition
| Specified Condition
|
A66-34 (IG1) - Body ground
| Ignition switch ON
| 10 to 14 V
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / ABS/VSC/TRC / DTC.
Read the DTCs.
- OK:
- C1241 is not output.
- Result:
Result
| Proceed to
|
OK (w/o VSC)
| A
|
OK (w/ VSC)
| B
|
NG (w/o VSC)
| C
|
NG (w/ VSC)
| D
|
