CHECK AT ABS-ECU TERMINAL


TERMINAL VOLTAGE CHECK CHART
1.Measure the voltages between earth terminal (12), (25), (26) or (42) and each respective terminal.

2.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 to the "ON" position. The ABS-ECU performs the initial check during that period.
Terminal No.
 Check item
 Checking requirements
 Normal condition
1
 Control solenoid valve OUT (FL)
 Ignition switch: ON
 System voltage
2
 Control solenoid valve OUT (RR)
 Ignition switch: ON
 System voltage
3
 Switch solenoid valve (FL)
 Ignition switch: ON
 System voltage
4
 G-sensor input
 Ignition switch: ON (with vehicle on a level surface)
 2.4 - 2.6 V
13
 Power supply of ABS-ECU
 Ignition switch: ON
 System voltage
Ignition switch: START
 0 V
14
 Control solenoid valve IN (FL)
 Ignition switch: ON
 System voltage
15
 Control solenoid valve IN (RR)
 Ignition switch: ON
 System voltage
16
 Switch solenoid valve (FR)
 Ignition switch: ON
 System voltage
18
 G-sensor earth
 Always
 0.5 V or less
31
 Power supply of ABS-ECU
 Ignition switch: ON
 System voltage
Ignition switch: START
 0 V
33
 Rear differential lock switch
 Ignition switch: ON
 System voltage
34
 Input to stop lamp switch
 Ignition switch: ON
 Stop lamp switch: ON
 System voltage
Stop lamp switch: OFF
 2 V or less
37
 Brake warning lamp output
 Ignition switch: ON
 System malfunction detected, with relay OFF
 System voltage
When approximately 1 second has elapsed after engine startup, with relay ON
 2 V or less
39
 Brake warning lamp output
 Ignition switch: ON
 With lamp OFF
 2 V or less
With lamp ON
 System voltage
40
 Control solenoid valve OUT (RL)
 Ignition switch: ON
 System voltage
41
 Control solenoid valve OUT (FR)
 Ignition switch: ON
 System voltage
46
 Centre differential lock switch input
 Ignition switch: ON
 Transfer lever position: 2H, 4H
 System voltage
Transfer lever position: 4HLc, 4LLc
 2 V or less
48
 Valve relay monitor
 Ignition switch: ON
 System voltage
50
 ABS warning lamp output
 Ignition switch: ON
 With lamp OFF
 System voltage
With lamp ON
 2 V or less
51
 Control solenoid valve IN (RL)
 Ignition switch: ON
 System voltage
52
 Control solenoid valve IN (FR)
 Ignition switch: ON
 System voltage

RESISTANCE AND CONTINUITY BETWEEN HARNESS-SIDE CONNECTOR TERMINALS
1.Turn the ignition switch to the "LOCK" (OFF) position.
2.Resistance measurement and continuity inspection must be performed with ABS-ECU connector disconnected.
3.Resistance measurement and continuity inspection is performed between the terminals shown in the following table.

4.Individual terminals are arranged as shown in the figure:
Terminal No.
 Signal
 Normal condition
7 - 20
 Wheel speed sensor (FL)
 1.0 - 1.5 kΩ
8 - 21
 Wheel speed sensor (RR)
9 - 22
 Wheel speed sensor (RL)
10 - 23
 Wheel speed sensor (FR)
12 - body earth
 Earth
 Continuity exists (2 Ω or less)
25 - body earth
 Earth
26 - body earth
 Earth
42 - body earth
 Earth