CHECK ECU TERMINAL


TERMINAL VOLTAGE CHECK
1.Do not disconnect the electric parking brake ECU connector, and measure the voltages between earth terminal No.9 or No.10 and each respective terminal.
2.The terminal layout is shown in the illustration.


Terminal No.
 Terminal code
 Check item
 Checking requirement
 Normal condition
1
 MRL-
 Motor output
 Ignition switch: ON
 Roughly half of the power supply voltage
2
 -
 -
 -
 -
3
 MRL+
 Motor output
 Ignition switch: ON
 Roughly half of the power supply voltage
4
 MRR-
 Motor output
 Ignition switch: ON
 Roughly half of the power supply voltage
5
 -
 -
 -
 -
6
 MRR+
 Motor output
 Ignition switch: ON
 Roughly half of the power supply voltage
7
 +B2
 Motor (LH) power supply
 Always
 Battery voltage
8
 -
 -
 -
 -
9
 -
 -
 -
 -
10
 -
 -
 -
 -
11
 -
 -
 -
 -
12
 +B1
 Motor (RH) power supply
 Always
 Battery voltage
Terminal No.
 Terminal code
 Check item
 Checking requirement
 Normal condition
21
 -
 -
 -
 -
22
 -
 -
 -
 -
23
 -
 -
 -
 -
24
 -
 -
 -
 -
25
 HSW
 Auto hold switch input
 Auto hold switch: ON
 1 V or less
26
 IG1
 Ignition switch input
 Ignition switch: ON
 Battery voltage
27
 -
 -
 -
 -
28
 +ECU
 ECU power supply
 Always
 Battery voltage
29
 -
 -
 -
 -
30
 CANL
 CAN bus line
 -
 -
31
 LCK1
 Lock switch 1 input
 Ignition switch: ON
 Approximately 4.3 V
32
 REL1
 Release switch 1 input
 Ignition switch: ON
 Approximately 8 V
33
 -
 -
 -
 -
34
 -
 -
 -
 -
35
 REL2
 Release switch 2 input
 Ignition switch: ON
 Approximately 8 V
36
 LCK2
 Lock switch 2 input
 Ignition switch: ON
 Approximately 8 V
37
 HND
 Auto hold switch indicator output
 The auto hold switch indicator is OFF.
 Battery voltage
The auto hold switch indicator is ON.
 1.5 V or less
38
 PIND
 Electric parking brake switch indicator output
 The electric parking brake switch indicator is OFF.
 Battery voltage
The electric parking brake switch indicator is ON.
 1.5 V or less
39
 -
 -
 -
 -
40
 CANH
 CAN bus line
 -
 -

CONTINUITY CHECK WIRING HARNESS-SIDE CONNECTOR
1.Turn the ignition switch to the LOCK (OFF) position.
2.Disconnect the electric parking brake ECU connector.
3.Check the resistance and continuity between the terminals indicated in the table below.
4.The terminal layout is shown in the illustration.


Terminal No.
 Terminal code
 Signal
 Normal condition
9 - body earth
 GND2
 Earth
 Continuity exists (2 Ω or less)
10 - body earth
 GND1
 Earth
 Continuity exists (2 Ω or less)