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ABS 15 DESCRIPTION AND OPERATION ABS ECU connector pin details - Up to 99MY (Continued) Pin No. Description Input/Output 17 Front right wheel speed sensor Input 18 Rear left wheel speed sensor Input 19 Not used - 20 Brake booster/ABS modulator - ETC normally closed valve Output 21 Brake booster/ABS modulator - Rear left inlet valve Output 22 Brake booster/ABS modulator - Rear left outlet valve Output 23 Brake booster/ABS modulator - Front left inlet valve Output 24 Brake booster/ABS modulator - Front left outlet valve Output 25 Brake switch 1 (normally open) Input 26 BeCM - ABS warning lamp Output 27 Earth Input 28 BeCM - Road speed signal Output 29 ECM - Rough road signal Output 30 ABS pump low pressure warning switch 1 Output 31 ABS pump low pressure warning switch 2 Input/Output 32 Front left wheel speed sensor Input 33 Rear right wheel speed sensor Input 34 Front right wheel speed sensor Input 35 Rear left wheel speed sensor Input |