MANUALS · SERVICE BRAKES [35] · страница 76 из 140 · Открыть оригинал PDF ↗

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Code No. 51 Valve relay

(Commentl

When the ignition switch is turned to ON, the ABS-ECU switches the valve relay
off and on during the initial check: In that way; the ABS-ECU compares the signals
sent to the valve relay with the voltage in the valve power monitor line: That is how
to check if the valve relay is operating normally:TheABS-ECU always checks if
current flows in the valve power monitor line, too. It determines that there is an
open circuit when no current flows. If no current flows in the valve power monitor
line, this diagnosis code is output:

Probable cause

Malfunction of valve relay

Malfunction of wiring harness or connector
Malfunction of ABS-ECU
Malfunction of hydraulic unit

NOTE

Whenever reading the diagnosis codes using the ABS warning lamp (P35-36-16), this diagnosis code will be
output: Thatis nota malfunction but because the valve relay connector is disconnected. After repairing all other
malfunctions, connect the valve relay connector again to check the valve relay: Then check that the ABS warn-
ing lamp does not illuminate. If it illuminates, the valve relay may be defective. So carry out the following proce-
dure_

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