C13A8
PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM: C13A8/44: Tension Sensor Malfunction
C13A8/44 - Tension Sensor Malfunction
DESCRIPTION
The tension sensor is built into the electric parking brake actuator. It detects the tension value of the parking brake cable and outputs the value to the electric parking brake ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
- If the electric parking brake ECU or electric parking brake actuator is replaced, perform the "RESET MEMORY" and "ACQUIRE TENSION SENSOR ZERO POINT" procedures Programming and Relearning.
- Even after the power switch is turned OFF, the electric parking brake ECU may store a DTC as a result of removing a connector or fuse, as the ECU is still operating. Therefore, during inspection or replacement, turn the power switch OFF and wait for 20 seconds before removing the following: 1) connectors of the electric parking brake ECU, and 2) fuses of the electric parking brake system circuit.
- This DTC may be output if a manual release cable is used. There is no malfunction. Perform the "RESET MEMORY" and "ACQUIRE TENSION SENSOR ZERO POINT" procedures Programming and Relearning.
PROCEDURE
1. CLEAR DTC
(a) Turn the power switch OFF.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch ON (IG) and the Techstream on.
(d) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
2. CHECK DTC
(a) Turn the power switch OFF.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch ON (IG) and the Techstream on.
(d) Check for DTC Reading and Clearing Diagnostic Trouble Codes.
Result
B -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (ECU - ACTUATOR)
(a) Disconnect the S48 ECU connector.
(b) Disconnect the S32 actuator connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK ELECTRIC PARKING BRAKE ECU (VT VOLTAGE)
(a) Measure the voltage according to the value(s) in the table below.
Standard voltage:
Result
B -- CHECK ELECTRIC PARKING BRAKE ECU (TSEN, TSN2, TGND)
A -- Continue to next step.
5. CHECK ELECTRIC PARKING BRAKE ECU (VT VOLTAGE)
(a) Disconnect the S32 actuator connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NG -- REPLACE ELECTRIC PARKING BRAKE ECU Removal
OK -- REPLACE ELECTRIC PARKING BRAKE ACTUATOR Removal
6. CHECK ELECTRIC PARKING BRAKE ECU (TSEN, TSN2, TGND)
(a) Connect the S48 ECU connector.
(b) Connect the S32 actuator connector.
(c) Measure the voltage between the terminals below.
Measurement condition
HINT
Take a note of the measurements.
(d) Turn the power switch OFF.
(e) Connect the Techstream to the DLC3.
(f) Turn the power switch ON (IG) and the Techstream on.
(g) Enter the following menus: Chassis / Electric Parking Brake / Data List.
(h) Check the values by referring to the table below.
HINT
This procedure is performed to compare the difference between the actual voltage and the voltage recognized by the ECU.
Electric Parking Brake
OK:
Values are as shown in normal condition.
Result
B -- CHECK ELECTRIC PARKING BRAKE ECU (DATA LIST)
A -- Continue to next step.
7. INSPECT ELECTRIC PARKING BRAKE ECU
(a) Remove the electric parking brake ECU Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE ELECTRIC PARKING BRAKE ECU Removal
OK -- REPLACE ELECTRIC PARKING BRAKE ACTUATOR Removal
8. CHECK ELECTRIC PARKING BRAKE ECU (DATA LIST)
(a) Turn the power switch OFF.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch ON (IG) and the Techstream on.
(d) Enter the following menus: Chassis / Electric Parking Brake / Data List.
(e) Check the values by referring to the table below.
Electric Parking Brake
OK:
Values are as shown in normal condition.
NG -- REPLACE ELECTRIC PARKING BRAKE ECU Removal
OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting