Circuit Description
The body control module (SBM) supplies voltage to CKT 275 when the following conditions occur:
| • | The ignition switch is in RUN. |
| • | The transaxle is in the PARK position. |
The SBM monitors the output and determines the actual voltage at terminal A6 every 0.3 seconds.
Conditions for Setting the DTC
The SBM detects a short to voltage on terminal A6 for more than 0.1 seconds.
Action Taken When the DTC Sets
| • | DTC B0803 is stored in the SBM memory. |
| • | No driver warning message is displayed. |
Conditions for Clearing the DTC
| • | The battery voltage is no longer detected by the SBM on terminal A6. |
| • | The history DTC clears after 50 consecutive ignition cycles if the condition for the malfunction is no longer present. |
Diagnostic Aids
A short to battery positive voltage (B+) in CKT 275 or CKT 1135 may cause this DTC to set.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Always perform the SBM Diagnostic System Check before attempting to diagnose a DTC B0803.
-
This step determines if a short to battery positive voltage (B+) exists on CKT 275 or CKT 1135.
-
This step determines if the short to voltage is located in CKT 275 or CKT 1135.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Did you perform the Body Control Module Diagnostic System Check? | -- | Go to Step 2 | ||
Is voltage present? | -- | Go to Step 3 | Go to Step 6 | |
Press and hold the brake pedal. Is the voltage still present? | -- | Go to Step 5 | Go to Step 4 | |
4 | Repair the short to B+ in CKT 1135. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 7 | -- |
5 | Repair the short to B+ in CKT 275. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 7 | -- |
6 |
Did you complete the repair? | -- | Go to Step 7 | -- |
7 |
Did you complete the repair? | -- | -- |
