Refer to Engine Controls Schematics
PCM Power and Grounds
.
Circuit Description
The powertrain control module (PCM) monitors system voltage on the PCM ignition feed circuit. If the system voltage is out of tolerance, DTC P0560 will be set. When the conditions that set DTC P0560 are present, operation of some vehicle systems and components may be affected.
Conditions for Running the DTC
The engine is running.
Conditions for Setting the DTC
| • | System voltage monitored at the PCM ignition feed circuit is less than 9 volts or more than 16 volts. |
| • | Above conditions for longer than 25 seconds. |
Action Taken When the DTC Sets
| • | The powertrain control module (PCM) stores the DTC information into memory when the diagnostic runs and fails. |
| • | The malfunction indicator lamp (MIL) will not illuminate. |
| • | The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Failure Records. |
Conditions for Clearing the MIL/DTC
| • | A History DTC will clear after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic. |
| • | The current DTC will clear when the diagnostic runs and does not fail. |
| • | Use a scan tool in order to clear the MIL diagnostic trouble code. |
| • | Interrupting the PCM battery voltage may or may not clear DTCs. This practice is not recommended. Refer to Powertrain Control Module Description , Clearing Diagnostic Trouble Codes. |
Diagnostic Aids
Notice: Use the connector test adapter kit J 35616-A for any test that
requires probing the following items:
• The PCM harness connectors • The electrical center fuse/relay cavities • The component terminals • The component harness connector
Important: Be sure to inspect PCM engine grounds for being secure and clean.
Important: Charging with a battery charger while starting the engine can cause DTC P0560 to set.
If DTC P0560 cannot be duplicated, reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to set occurs. This may assist in diagnosing the condition. For complete information and additional diagnostics for the vehicle charging system, refer to Diagnostic Starting Point in Engine Electrical.
If the problem is intermittent, refer to Intermittent Conditions .
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||
2 | Is DTC P1635 also set? | -- | ||
3 |
Is Ignition 1 voltage between the specified values? | 10 V-16 V | ||
4 |
Does the scan tool indicate DTC failed this ignition? | -- | Go to Diagnostic Aids | |
5 |
Does the DMM show battery voltage between the specified values? | 10 V-16 V | ||
6 |
Does the DMM show battery voltage between the specified values? | 10 V-16 V | ||
7 |
Does the DMM display voltage near the specified value with the Gen. L Term. commanded ON? | 5V | ||
8 | Compare the Ignition 1 voltage displayed on the scan tool with the actual battery voltage read with the DMM. Does the scan tool Ignition 1 value closely match the actual value read with the DMM? | -- | Go to Diagnostic Aids | |
9 |
Was a problem found? | -- | ||
10 |
Was a problem found? | -- | ||
11 |
Was a problem found? | -- | ||
12 |
Was a problem found? | -- | Go to Diagnostic Starting Point in Engine Electrical | |
|
Important: The replacement PCM must be programmed. Replace the PCM. Refer to Powertrain Control Module Replacement/Programming . Is action complete? | -- | -- | ||
14 |
Is Ignition 1 voltage between the specified values? | 10 V-16 V | ||
15 | Review Captured Info using the scan tool. Are there any DTCs that have not been diagnosed? | -- | Go to the applicable DTC table | System OK |
