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DTC C1305/21 Solenoid Identification Circuit: Description

The skid control ECU receives solenoid identification signals from terminals SSEL and SEL2. The skid control ECU specifies control characteristics of the brake actuator by monitoring the difference in the holding solenoid (FRA, FLA, RRA and RLA) current, which is caused by characteristics of each actuator.

Fig 1: Differential Pressure And Current Graph
G05807059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC CODE REFERENCE CHART

DTC Code DTC Detection Condition Trouble Area
C1305/21 Immediately after the engine is started, an open or short in the solenoid characteristics identification circuit continues for 0.21 seconds or more.
  • Internal solenoid identification circuit of the brake actuator assembly
  • Skid control ECU