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General information:
· ECU includes self diagnostic function.
· In the event of a system failure the ABS warning light will come on.
· Trouble codes can be obtained by using a suitable code reader connected to the data link connector(DLC)
or diagnostic socket(fig 1).
FAULT CODE IDENTIFICATION {| |- | Fault code Fault location1
Pump motor2
System relay2
Pump motor relay3
Left rear, wheel speed sensor4
Left rear-signal, wheel speed sensor5
Right front, wheel speed sensor6
Right front-signal, wheel speed sensor7
Right rear, wheel speed sensor8
Right rear-signal, wheel speed sensor9
Left front, wheel speed sensor10
Left front-signal, wheel speed sensor11
Left rear, hydraulic modulator solenoid valve12
Front right, hydraulic modulator solenoid valve13
Right rear, hydraulic modulator solenoid valve14
Left front, hydraulic modulator solenoid valve15
Wheel speed sensor toothed rings16
Brake pedal position (BPP)switch17
ECU(Electronic control unit)18
Battery voltage WARNING LAMP Correct operating sequence: -Turn ignition on -Lamp switches on -Lamp goes out after approximately 2 seconds. GENERAL TEST PROCEDURES When doing these make sure correct test probes are used to avoid damaging the ECU harness multi-plug terminals. Warning lamp circuit The ECU harness multi-plug may contain a switch function so, if disconnected, the warning lamp will switch on. HOW TO CHECK(refer to fig 2) - Switch the ignition on. - Make sure warning lamp comes on. - If it doesn't, switch off ignition. - Check the fuses. - Disconnect the ECU multi-plug. - Switch the ignition back on. - Check warning lamp comes on. - If it doesn't, switch off ignition. - Bridge the harness multi-plug terminals 19 & 21 for 1997 to 98 models. - Bridge the harness multi-plug terminals 19 & 20 for 1999 onwards models. - Switch the ignition back on. - check if the warning lamp comes on. - If it doesn't again, switch the ignition off again. - Now check the wiring and bulb. |}
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