Test Description
The numbers below refer to step numbers on the diagnostic table.
- 3: This step tests the voltage of spark retard circuit of the EBCM.
- 4: This step tests the spark retard circuit of the EBCM or a short to voltage.
- 5: This step tests the spark retard circuit of the EBCM or an open, high resistance or short to ground.
DTC 73
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| Schematic Reference: ABS Schematics Connector End View Reference: ABS Connector End Views |
||||
| 1 | Did you perform A Diagnostic System Check - ABS? | - | Go to Step 2 | Go to Diagnostic System Check - ABS |
| 2 | Is DTC 73 set as a current DTC? | - | Go to Step 3 | Go to Diagnostic Aids |
| 3 |
|
Battery Voltage | Go to Step 4 | Go to Step 5 |
| 4 | Test the SPK retard circuit of the EBCM 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 8 | Go to Step 6 |
| 5 | Test the SPK retard circuit of the EBCM for an open, high resistance or short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 8 | Go to Step 7 |
| 6 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? |
- | Go to Step 8 | - |
| 7 | Replace the powertrain control module (PCM). Refer to Powertrain Control Module (PCM) Replacement
in Engine Controls - 5.7L. Did you complete the replacement? |
- | Go to Step 8 | - |
| 8 |
|
- | Go to Step 2 | System OK |