WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- The electric parking brake may still operate up to 20 seconds after the
engine switch is turned off. Before disconnecting connectors or fuses,
turn the engine switch off and wait 20 seconds or more.
- When replacing the skid control ECU (brake actuator assembly), operate
the electric parking brake switch assembly as the parking brake
indicator light blinks (red) when the engine switch is first turned on
(IG).
HINT: Even if
the electric parking brake is operating normally, the parking brake
indicator light (red) on the combination meter may be malfunctioning. PROCEDURE
| 1. |
CHECK CAN COMMUNICATION SYSTEM | (a) Check if CAN communication system DTCs are output. Chassis > Electric Parking Brake > Trouble Codes
| Result |
Proceed to | | DTCs are not output |
A | | DTCs are output |
B |
| B |
 | GO TO CAN COMMUNICATION SYSTEM |
|
A |
 | |
| 2. |
VEHICLE OPERATION CHECK | (a)
When the vehicle's tires are lifted off the ground and the Techstream
is used to operate the electric parking brake, check the condition of
the rear tires. Click here 
|
Result | Proceed to | |
Lock and release operation is normal and parking brake indicator light turns off or blinks (red) |
A | | Lock
and release operation is malfunctioning and parking brake indicator
light illuminates (red) or turns off according to switch operation |
B | | Lock and release operation is malfunctioning and parking brake indicator light turns off or blinks (red) |
C |
| B |
| INSPECT REAR BRAKE |
| C |
| GO TO STEP 5 |
|
A | |
| |
| 3. |
PERFORM ACTIVE TEST USING TECHSTREAM (PARKING BRAKE LIGHT) |
(a) Turn the engine switch off. (b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG). (d) Turn the Techstream on.
(e) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Data List.
(f) Read the Data List according to the display on the Techstream. Chassis > ABS/VSC/TRAC/EPB > Active Test
|
Tester Display | Measurement Item |
Control Range | Diagnostic Note | |
PKB Light | Parking brake indicator light (red) |
ON or OFF |
- Vehicle stopped
- Engine switch on (IG)
- Parking brake released
| Chassis > ABS/VSC/TRAC/EPB > Active Test
(g) Select the Data List on the Techstream. Chassis > ABS/VSC/TRAC/EPB > Data List
|
Tester Display | Measurement Item |
Range | Normal Condition |
Diagnostic Note | |
Parking Brake Light | Parking brake indicator light (red) output signal |
OFF, Light or Blink | OFF: Parking brake indicator light (red) turns off
Light: Parking brake indicator light (red) illuminates Blink: Parking brake indicator light (red) flashes |
- | Chassis > ABS/VSC/TRAC/EPB > Data List
|
Tester Display | | Parking Brake Light |
(h) Check the operating condition of the parking brake indicator light (red) when operating it using the Techstream.
| Result |
Proceed to | | Parking brake indicator light (red) in the Data List does not change using the Active Test |
A | | Parking brake indicator light (red) in the Data List turns ON/OFF using the Active Test |
B |
| A |
| REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) |
|
B | |
| |
| 4. |
INSPECT COMBINATION METER ASSEMBLY | (a) Perform the Active Test of the combination meter assembly using the Techstream. Body Electrical > Combination Meter > Active Test
|
Tester Display | | Indicat. Park |
(b) Check the combination meter assembly. OK: Parking brake indicator light (red) turns on or off in accordance with Techstream operation.
| OK |
| REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) |
| NG |
| GO TO METER / GAUGE SYSTEM |
| 5. |
CHECK HARNESS AND CONNECTOR (BATTERY - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) |
(a) Turn the engine switch off.
| (b) Disconnect the A28 skid control ECU (brake actuator assembly) connector. |
 |
|
*a | Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly)) | | |
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
A28-36 (IG1) - Body ground |
Engine switch on (IG) |
11 to 14 V |
| OK |
| REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR | | 
