DTC C1065
Precautions: Precautions for ESP® · Precautions for Diagnosing Trouble · Test with Speedometer Tester or Other Equipment · Precautions for Brakes · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
C1065: Brake Light Relay Circuit Failure Inconsistency between input voltage to brake light relay and monitored status continues for longer than specified time. |
•Brake light relay
•Brake light relay circuit •ESP® control module |
Circuit Diagram
| [A]: | ESP® control module connector (View: [a]) | C1. | Brake light relay signal circuit | 5. | Brake light relay |
| A1. | Brake light relay power supply circuit (coil side) | 1. | Lead to battery | 6. | Brake light switch |
| A2. | Brake light relay power supply circuit (switch side No.1) | 2. | J/B | 7. | To ECM |
| A3. | Brake light relay power supply circuit (switch side No.2) | 3. | “ABS” fuse (10A) | 8. | Brake light |
| B1. | Brake light relay drive circuit | 4. | “STOP” fuse | 9. | ESP® control module |
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “ESP® System Check” performed?
|
Go to Step 2.
|
Go to ESP® System Check.
|
| 2 |
DTC check
1)Perform DTC Check.
Is DTC C1016 detected?
|
Go to DTC C1016.
|
Go to Step 3.
|
| 3 |
Brake light relay operation check
1)Check brake light relay for operation by using “Brake Light Relay” function in “Active Test” mode on SUZUKI scan tool.
Is check result OK?
|
Intermittent trouble.
|
Go to Step 4.
|
| 4 |
Brake light relay power supply circuit (coil side) check
1)When ignition is “OFF”, disconnect brake light relay connector.
2)Check for proper connection to brake light relay connector.
3)If connections are OK, set ignition “ON”.
4)Check that voltage between “A1” circuit and ground is 10 – 14 V.
Is check result OK?
|
Go to Step 5.
|
Repair or replace defective wire harness.
|
| 5 |
Brake light relay power supply circuit (switch side No.1) check
1)Set ignition “OFF”.
2)Check that voltage between “A2” circuit and ground is 10 – 14 V.
Is check result OK?
|
Go to Step 6.
|
Repair or replace defective wire harness.
|
| 6 |
Brake light relay power supply circuit (switch side No.2) check
1)Check that voltage between “A3” circuit and ground when brake pedal is depressed and released.
•When brake pedal is depressed: 10 – 14 V
•When brake pedal is released: approx. 0 V Is check result OK?
|
Go to Step 7.
|
Repair or replace defective wire harness.
|
| 7 |
Brake light relay check
1)Check brake light relay.
Is check result OK?
|
Go to Step 8.
|
Replace brake light relay.
|
| 8 |
Brake light relay drive circuit check
1)Check that ignition is “OFF”.
2)Disconnect “E08” connector.
3)Check the following points.
•Resistance of “B1” circuit: less than 1 Ω
•Resistance between “B1” circuit and ground: infinity •Resistance between “B1” circuit terminal and other terminal at brake light relay connector: infinity Is check result OK?
|
Go to Step 9.
|
Repair or replace defective wire harness.
|
| 9 |
Brake light relay signal circuit check
1)Check the following points.
•Resistance of “C1” circuit: less than 1 Ω
•Resistance between “C1” circuit terminal and other terminal at brake light relay connector: infinity •Voltage of “C1” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Replace ESP® hydraulic unit / control module assembly and recheck DTC.
|
Repair or replace defective wire harness.
|