DTC C1638
Precautions: Precautions for Diagnosing Trouble · Precautions for RBS System · Precautions for Servicing RBS System · Precautions for Removing / Installing and Replacing RBS Control Module · Precautions for Control Systems · General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
C1638: RBS OFF Switch Circuit RBS control module received ON signal of RBS OFF switch from BCM for specified time continuously. |
•RBS OFF switch circuit / connector
•RBS OFF switch •BCM |
Circuit Diagram
| [A]: | BCM connector (View: [a]) | 1. | RBS OFF switch | 3. | RBS control module |
| A1: | RBS OFF switch signal circuit | 2. | BCM | 4. | CAN driver |
DTC Confirmation Procedure
1)Set ignition “ON”.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “RBS System Check” performed?
|
Go to Step 2.
|
Go to RBS System Check.
|
| 2 |
RBS OFF switch signal circuit check
1)Check that ignition is “OFF”.
2)Disconnect RBS OFF switch and “L01” connectors.
3)Check for proper terminal connection to RBS OFF switch and “L01” connectors.
4)If connections are OK, check the following points.
•Resistance of “A1” circuit: less than 1 Ω
•Resistance between “A1” circuit and ground: infinity •Resistance between “A1” circuit terminal and other terminal at “L01” connector: infinity •Voltage of “A1” circuit: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
RBS OFF switch check
1)Check RBS OFF switch.
Is check result OK?
|
Replace BCM and recheck DTC.
|
Replace RBS OFF switch.
|