Conditions for Clearing the MIL/DTC
WARNING: This page is about a different variant/trim than selected.
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
DTC P0802
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic References: Automatic Transmission Controls Schematics
for the Allison transmission Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Connect a scan tool. Did P0802 fail this ignition? |
- | Go to Step 4 | Go to Step 3 |
| 3 |
|
- | Go to Step 4 | Go to Testing for Intermittent Conditions and Poor Connections |
| 4 |
|
B+ | Go to Step 5 | Go to Step 6 |
| 5 | Test the TCM MIL request circuit for a short to voltage. Repair as necessary. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct a condition? |
- | Go to Step 12 | Go to Step 7 |
| 6 | Test the TCM MIL request circuit for an open. Repair as necessary. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct a condition? |
- | Go to Step 12 | Go to Step 7 |
| 7 |
|
- | Go to Step 8 | Go to Step 10 |
| 8 | Test the TCM connectors for a bad connection. Refer to Circuit Testing
and Connector Repairs
. Did you find and correct a condition? |
- | Go to Step 12 | Go to Step 9 |
| 9 | Replace the TCM. Refer to Transmission Control Module (TCM) Replacement
for the Allison transmission. Did you complete the replacement? |
- | Go to Step 12 | - |
| 10 | Test the powertrain control module (PCM) connectors for a bad connection. Refer to Circuit Testing
and Connector Repairs
. Did you find and correct a condition? |
- | Go to Step 12 | Go to Step 11 |
| 11 | Replace the PCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 12 | - |
| 12 |
|
- | Go to Step 13 | Go to Step 2 |
| 13 | Observe the stored information, Capture Info with a scan tool. Does the scan tool display any DTCs that you have not diagnosed? |
- | Go to Diagnostic Trouble Code (DTC) List - Vehicle | System OK |