C1361
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C0273/13,C0274/14,C1361/91: Open in ABS Motor Relay Circuit
DESCRIPTION
If a DTC of the motor line is stored, the VSC NO. 1 (fail safe) relay cuts off the power supply to the VSC NO. 2 relay and performs fail safe.
While any of the ABS, TRAC, VSC, or BA is operating, the skid control ECU (housed in the actuator assembly) turns the VSC NO. 2 relay on and activates the pump motor in the brake actuator.
This code may be stored if the motor relay (BM) voltage becomes lower than the DTC detecting condition due to insufficient output from the battery or alternator.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When replacing the brake actuator assembly, perform zero point calibration Calibration.
PROCEDURE
1. INSPECT ABS NO. 1 FUSE
(a) Remove the fusible link from the engine room R/B.
Text in Illustration
(b) Check if the fusible link is melted.
OK:
The fusible link is not melted.
(c) Install the fusible link to the engine room R/B with the nut.
Text in Illustration
Torque : 5.4 Nm (55 kgf-cm, 48 in-lbf)
NG -- REPLACE FUSIBLE LINK (ABS NO. 1 FUSE)
OK -- Continue to next step.
2. INSPECT ABS MOTOR RELAY (VSC NO. 2 RELAY)
(a) Remove the VSC NO. 2 relay.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Text in Illustration
NG -- REPLACE ABS MOTOR RELAY (VSC NO. 2 RELAY)
OK -- Continue to next step.
3. INSPECT ABS MOTOR RELAY (VSC NO. 1 (FAIL SAFE) RELAY)
(a) Remove the VSC NO. 1 (fail safe) relay.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Text in Illustration
NG -- REPLACE ABS MOTOR RELAY (VSC NO. 1 (FAIL SAFE) RELAY)
OK -- Continue to next step.
4. INSPECT ENGINE ROOM RELAY BLOCK (POWER SOURCE TERMINAL)
(a) Measure the voltage according to the value(s) in the table below.
Standard voltage:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
OK -- Continue to next step.
5. INSPECT ENGINE ROOM RELAY BLOCK
(a) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Text in Illustration
NG -- REPAIR OR REPLACE ENGINE ROOM RELAY BLOCK
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ENGINE ROOM RELAY BLOCK)
(a) Disconnect the skid control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. RECONFIRM DTC
(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
(b) Start the engine.
(c) Drive the vehicle at the speed of 6 km/h (4 mph) or more.
(d) Check if the same DTC is recorded Reading and Clearing Diagnostic Trouble Codes.
HINT
Reinstall the relays, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.
Result:
HINT
- If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU, with the engine switch on (IG) and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
- If the normal system code is output (the trouble code is not output), slightly jiggle the connectors, wire harness, and fuses of the brake actuator assembly. Make sure that no DTCs are output.
- If any DTCs are output while jiggling a connector or wire harness of the brake actuator assembly (skid control ECU), inspect and repair the connector or wire harness.
B -- REPLACE BRAKE ACTUATOR ASSEMBLY
A -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)