[35B] ANTI-SKID BRAKING SYSTEM (ABS) - - TROUBLESHOOTING - CHECK AT ABS-ECUPRINT PAGE / INDEX / PRIOR / NEXT
CHECK AT ABS-ECU
Use the following steps to remove the connector cover and measure the terminal voltage.
       
    1. Move the lock lever of the ABS-ECU connector as shown in the illustration, and then disconnect the ABS-ECU connector.
         
      1. Insert the flat-tipped screwdriver to the aperture (arrow area as shown in the illustration) between ABS-ECU connector and connector cover to disengage the claw and remove the connector cover.
      TERMINAL VOLTAGE CHECK CHART
           
        1. Measure the voltages between terminals (2) and (18) (earth terminals) and each respective terminal.
        1. The terminal layouts are shown in the illustrations below.
        NOTE: Do not measure terminal voltage for approximately three seconds after the ignition switch is turned "ON." The ABS-ECU performs the initial check during that period.
        Terminal No.
        		 Check item
        		 Checking requirements
        		 Normal condition
        1
        		 Solenoid valve power supply
        		 Always
        		 System voltage
        3
        		 Stop lamp switch input
        		 Ignition switch: "ON"
        		Stop lamp switch: "ON"
        		System voltage
        Stop lamp switch: "OFF"
        		Approximately 0 V
        4
        		 Diagnosis changeover input
        		 When the MUT-II/III is connected
        		 Approximately 0 V
        When the MUT-II/III is not connected
        		 System voltage
        8
        		 G-sensor earth <4WD>
        		 Always
        		 Approximately 0 V
        12
        		 ABS-ECU warning lamp transistor output
        		 Ignition switch: "ON"
        		When the lamp is switched off
        		 Approximately 0 V
        When the lamp is illuminated
        		 System voltage
        13
        		 MUT-II/III
        		 When the MUT-II/III is connected
        		 Serial communication with MUT-II/III
        When the MUT-II/III is not connected
        		 Approximately 0 V
        15
        		 G-sensor input <4WD>
        • Ignition switch: "ON"
        • Horizontal state of vehicle
        		 2.4 - 2.6 V
        19
        		 Motor power supply
        		 Always
        		 System voltage
        20
        		 ABS-ECU power supply
        		 Ignition switch: "ON"
        		System voltage
        Ignition switch: "START"
        		Approximately 0 V
        RESISTANCE AND CONTINUITY BETWEEN HARNESS-SIDE CONNECTOR TERMINALS
             
          1. Turn the ignition switch to the "LOCK" (OFF) position and disconnect the ABS-ECU connectors before checking resistance and continuity.
          1. Check the resistance and continuity between the terminals indicated in the table below.
          1. The terminal layout is shown in the illustration.
          ABS-ECU terminal No.
          		 Signal
          		 Normal condition
          9 - 10
          		 Front-right ABS sensor
          		 1.24 - 1.64 kΩ
          11 - 17
          		 Rear-right ABS sensor
          		 1.24 - 1.64 kΩ
          16 - 26
          		 Front-left ABS sensor
          		 1.24 - 1.64 kΩ
          27 - 28
          		 Rear-left ABS sensor
          		 1.24 - 1.64 kΩ
          2 - body earth
          		 Earth
          		 Less than 2 ohms
          18 - body earth
          		 Earth
          		 Less than 2 ohms
          [35B] ANTI-SKID BRAKING SYSTEM (ABS) - - TROUBLESHOOTING - CHECK AT ABS-ECUPRINT PAGE / INDEX / PRIOR / NEXT
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