Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
If the DTC is only found in history, the fault may be intermittent. Refer toTesting for Intermittent Conditions and Poor Connections in Wiring Systems.
DTC B1830, B1835, B1840 or B1845 Diagnostic Test
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views |
|||
| 1 | Did you perform the Power Seat Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Power Seat Systems |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the power lumbar switch connector. Does the scan tool display Idle? |
Go to Step 5 | Go to Step 4 |
| 4 | Test the switch signal circuit for which the DTC has set for a short to voltage. Refer to Circuit Testing
and to Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 9 | Go to Step 7 |
| 5 | Inspect for poor connections at the power lumbar switch. Refer to Testing for Intermittent Conditions and Poor Connections
and toConnector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 9 | Go to Step 6 |
| 6 | Replace the lumbar switch. Refer to Lumbar Switch Replacement - Front . Is the repair complete? |
Go to Step 9 | - |
| 7 | Inspect for poor connections at the seat module. Refer to Testing for Intermittent Conditions and Poor Connections
and to Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 9 | Go to Step 8 |
| 8 | Replace the seat module. Refer to Memory Seat Control Module Replacement . Is the repair complete? |
Go to Step 9 | - |
| 9 |
|
Go to Step 2 | System OK |