DESCRIPTION If a malfunction is detected in the power supply circuit, the skid control ECU (brake actuator assembly) stores this DTC and the fail-safe function prohibits ABS operation. This DTC is stored when the +BS terminal voltage meets one of the DTC detection conditions due to a malfunction in the power supply or charging circuit such as the battery or alternator circuit, etc. The DTC is cleared when the +BS terminal voltage returns to normal.
WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
PROCEDURE
(a) Check the battery voltage. Standard Voltage:
(b) Disconnect the A57 skid control ECU (brake actuator assembly) connector. (c) Check both the connector case and the terminals for deformation and corrosion. OK: No deformation or corrosion. (d) Measure the voltage according to the value(s) in the table below. Standard Voltage:
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Reconnect the A57 skid control ECU (brake actuator assembly) connector. (b) Clear the DTCs. Click here (c) Turn the ignition switch off. (d) Start the engine. (e) Perform a road test. (f) Check if the same DTC is output. Click here
|
Toyota Tundra Service Manual > How To Troubleshoot Ecu Controlled Systems: Electronic Circuit Inspection Procedure
ELECTRONIC CIRCUIT INSPECTION PROCEDURE 1. BASIC INSPECTION (a) WHEN MEASURING RESISTANCE OF ELECTRONIC PARTS (1) Unless otherwise stated, all resistance measurements should be made at an ambient temperature of 20°C (68°F). Resistance measurements may be inaccurate if measured at high temperatures ...