Code Definition

C1140 — Actuator Relay

System: Chassis  |  Type: Manufacturer-Specific  |  Make: Toyota

About C1140

C1140 is a manufacturer-specific chassis diagnostic trouble code recorded for Toyota vehicles. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

C1140 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The skid control ECU operates the ABS hydraulic actuator through an internal actuator relay that supplies battery power to the solenoid valves and the pump motor. DTC C1140 sets when the ECU detects that this actuator relay circuit is not behaving as commanded, either failing to close when energised, staying closed when it should open, or returning no voltage feedback at the relay output. Because the relay enables ABS, brake assist, TRAC, and VSC operation, a fault in this circuit disables those systems. When the code is stored the ABS, brake, and traction control warning lamps illuminate and ...

Join TaT to view the complete code information and diagnostic details.

Quick Facts