Circuit Description

The ABS motor relays consist of 2 relays and are included in the ABS R/B.
The ABS cut relay is turned on after turning the ignition switch to the ON position. If the DTCs in the ABS pump motor circuit are memorized, the ABS cut relay cuts off the power supply to the ABS motor relay and performs the fail safe.
While any of the ABS, BA, TRAC and VSC is operating, the skid control ECU (included in the actuator) turns the ABS motor relay on to operate the actuator pump motor.
If the voltage applied to the ABS motor relays (+BM) drops below value where the DTCs are detected due to shortage of the battery or alternator output, the DTCs may be memorized.

ABS MOTOR RELAY

DTC No.	DTC Detecting Condition	Trouble Area
C0273/13	When any of the following (1 to 2) is detected: All the following conditions continue for at least 0.2 seconds. IG1 voltage is between 9.5 and 17.2 V. During initial check. ABS, BA, TRAC, and VSC are in operation. Relay contact is open when the relay is ON. All the following conditions continue for at least 0.2 seconds. IG1 voltage is less than 9.5 V. Relay contact remains open when the relay is ON.	ABS No.1 fuse ABS MTR relay ABS MTR relay circuit ABS R/B
C0274/14	The following condition continues for at least 4 seconds. Relay contact is closed when the relay is OFF.	ABS No.1 fuse ABS MTR relay ABS MTR relay circuit ABSR/B
C1361/91	All the following conditions continue for at least 4 seconds. Immediately after turning IG switch to the ON position. Relay contact is closed when fail-safe relay is OFF.	ABS No.1 fuse ABS R/B ABS cut relay ABS cut relay circuit