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Ecu Pin Voltage

ABS/TRAC ECU PIN VOLTAGE SPECIFICATIONS (1997-98)

Measure Between ECM Terminals (1) Conditions Volts
A21-11 & A20-3, A20-10 Or A22-24 Ignition On 10-14
A20-4 & A20-6 Ignition On & ABS Warning Light Off Less Than 1.5
A20-12 & A20-6 Ignition On 10-14
A22-13 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A22-26 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A20-2 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A20-1 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A20-8 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A20-7 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A22-11 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A22-12 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A20-11 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A22-10 & A20-3, A20-10 Or A22-24 Ignition On, TRAC Off & Warning Light Off 10-14
A22-9 & A20-3, A20-10 Or A22-24 Ignition On, TRAC Off & Warning Light Off 10-14
A22-25 & A20-3, A20-10 Or A22-24 Ignition On, TRAC Off & Warning Light Off 10-14
A22-2 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light On Less Than 2.0
A22-2 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A21-12 & A20-3, A20-10 Or A22-24 Ignition On & Fluid In Master Cylinder Reservoir Below MIN Level 8-14
(1) See Fig 1.
ABS/TRAC ECU PIN VOLTAGE SPECIFICATIONS (1997 ONLY)

Measure Between ECM Terminals (1) Conditions Volts
A21-16 & A20-3, A20-10 Or A22-24 Stop Light Switch Off Less Than 1.5
A21-16 & A20-3, A20-10 Or A22-24 Stop Light Switch On 8-14
A22-15 & A20-3, A20-10 Or A22-24 Ignition On & ABS Warning Light Off 10-14
A22-1 & A20-3, A20-10 Or A22-24 Ignition On 10-14
A22-14 & A20-3, A20-10 Or A22-24 Ignition On 10-14
A22-17 & A22-4 Ignition On & Slowly Turning R/F Wheel AC Generation
A22-5 & A22-18 Ignition On & Slowly Turning L/F Wheel AC Generation
A21-2 & A21-10 Ignition On & Slowly Turning R/R Wheel AC Generation
A21-9 & A21-1 Ignition On & Slowly Turning L/R Wheel AC Generation
A22-16 & A20-3, A20-10 Or A22-24 Ignition On & SLIP Warning Light On Less Then 2.0
A22-16 & A20-3, A20-10 Or A22-24 Ignition On & SLIP Warning Light Off 10-14
A22-3 & A20-3, A20-10 Or A22-24 Ignition On & TRAC OFF Warning Light On Less Then 2.0
A22-3 & A20-3, A20-10 Or A22-24 Ignition On & TRAC OFF Warning Light Off 10-14
A22-16 & A20-3, A20-10 Or A22-24 Ignition On & SLIP Warning Light Off 10-14
A21-6 & A20-3, A20-10 Or A22-24 Ignition On & TRAC Switch Pushed In Less Then 1.5
A21-6 & A20-3, A20-10 Or A22-24 Ignition On & TRAC Switch Released 8-14
A21-15 & A20-3, A20-10 Or A22-24 Idling Pulse Generation
A21-3 & A20-3, A20-10 Or A22-24 Ignition On Pulse Generation
A21-5 & A20-3, A20-10 Or A22-24 Ignition On Pulse Generation
A21-13 & A20-3, A20-10 Or A22-24 Ignition On Pulse Generation
A21-14 & A20-3, A20-10 Or A22-24 Ignition On Pulse Generation
A22-7 & A20-3, A20-10 Or A22-24 TRAC Control Active Pulse Generation
A22-20 & A20-3, A20-10 Or A22-24 TRAC Control Active Pulse Generation
A20-5 & A20-3, A20-10 Or A22-24 Ignition On Less Than 1.5
(1) See Fig 1.
Fig 1: Identifying A20, A21 & A22 ABS/TRAC ECU Connector Terminals
G98A07600Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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