Test Description
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The number below refers to the indicated step number on the diagnostic table.
- 8: This relay may be a permanently integrated in the BEC on some vehicles, in this case you must replace the BEC in order to complete the repair.
DTC P2535
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Controls Schematics
in Engine Controls - 3.8L (L26 and L32) Connector End View Reference: Powertrain Control Module (PCM) Connector End Views and Engine Controls Connector End Views in Engine Controls - 3.8L (L26 and L32) |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
|
Go to Step 4 | Go to Step 3 |
| 3 | Connect a test lamp between the ignition 1 voltage circuit on the body control module (BCM) side of the relay and a good ground. Does the test lamp illuminate? |
Go to Step 5 | Go to Step 8 |
| 4 | Test the ignition 1 voltage circuit between the PCM and the ignition 1 relay for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 6 |
| 5 | Test the ignition 1 voltage circuit between the BCM and the ignition 1 relay for a short to voltage. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 7 |
| 6 | Test for an intermittent and for a poor connection at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 9 |
| 7 | Test for an intermittent and for a poor connection at the BCM. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 11 | Go to Step 10 |
| 8 | Replace the ignition 1 relay. Refer to Relay Replacement (Within an Electrical Center)
or Relay Replacement (Attached to Wire Harness)
in Wiring Systems. Did you complete the replacement? |
Go to Step 11 | - |
| 9 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? |
Go to Step 11 | - |
| 10 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? |
Go to Step 11 | - |
| 11 |
|
Go to Step 2 | Go to Step 12 |
| 12 | With a scan tool, observe the stored information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed? |
Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK |