DTC P0560 System Voltage. Chevrolet Monte Carlo 1999

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1999 🢒 Monte Carlo 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 DTC P0560 System Voltage

Refer to

Cell 21: Engine Data Sensors-Indicator Lamps

Engine Controls Components
Powertrain Control Module Description
Cell 11: Anti-Theft PCM (12), Air Bag (21), Turn Signal (30), and IP Electronics Ignition Feed (39) Fuses
Cell 10: Fuses 12, 21, 30, 33, 39, and 42
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
OBD II Symbol Description Notice
Cell 14: G201 and G204 (SEO)
Cell 21: Engine Data Sensors-VSS, Cruise
Cell 21: Engine Data Sensors-IAC, Engine Oil Level
Cell 14: G201 and G204 (SEO)

Circuit Description

The 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 greater than 16 volts.

•	Above conditions for longer than 25 seconds.

Action Taken When the DTC Sets

The PCM stores conditions which were present when the DTC set as Failure Records only. This information will not be stored as Freeze Frame Records.

Conditions for Clearing the MIL/DTC

•	The DTC becomes history when the conditions for setting the DTC are no longer present.

•	The history DTC clears after 40 malfunction free warm-up cycles.

•	The PCM receives a clear code command from the scan tool.

Diagnostic Aids

Check for the following conditions:

Important: Be sure to inspect PCM engine grounds for being secure and clean.

•	Poor connection at PCM.

Inspect harness connectors backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, or poor terminal to wire connections.

•	Damaged harness.

Inspect the wiring harness for damage. If the harness appears to be OK, observe the Ignition 1 voltage display on the scan tool while moving connectors and wiring related to the PCM, dash harness, and engine harness. A change in the display will indicate the location of the malfunction.

Important: Charging with a battery charger while starting the engine can cause DTC P0560 to be set.

If DTC P0560 cannot be duplicated, reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition. For complete information and additional diagnostics for the vehicle charging system, refer to Charging System.

Test Description

Number(s) below refer to the step number(s) on the Diagnostic Table.

This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.

DTC P0560 - System Voltage

Step	Action	Value(s)	Yes	No
1	Was the Powertrain On-Board (OBD) Diagnostic System Check performed?	--	Go to Step 2	Go to Powertrain On Board Diagnostic (OBD) System Check
2	Is DTC P1635 also set?	--	Go to DTC P1635 5 Volt Reference Circuit	Go to Step 3
3	Start and run engine above 1000 RPM. With a scan tool, observe Ignition 1 voltage. Is the voltage within the specified values?	10-16V	Go to Step 4	Go to Step 5
4	Review and record the scan tool Fail Records data. Clear the DTC P0560 and operate the vehicle to duplicate the Fail Records conditions. With a scan tool, monitor Specific DTC info for DTC P0560 until the DTC P0560 test runs. Note test result; Does the scan tool indicate DTC failed this ignition?	--	Go to Step 5	Go to Diagnostic Aids
5	Connect a J 39200 Digital Multimeter between the battery terminals. Monitor the DMM voltage while running the engine above 1000 RPM. Is the voltage within the specified values?	10-16V	Go to Step 6	Go to Step 7
6	Load the electrical system by turning ON the headlamps and the HVAC high blower. Monitor the Digital Multimeter voltage while running the engine above 2000 RPM. Is the voltage within the specified values?	10-16V	Go to Step 8	Go to Step 7
7	Turn OFF the ignition. Disconnect the generator. Measure the voltage on the generator control circuit at the generator harness connector using a DMM that is connected to a good ground. Start the engine. With a scan tool, command the Gen. L Term. ON. Does the Digital Multimeter display voltage near the specified value with the Gen. L Term. commanded ON?	5V	Go to Step 12	Go to Step 10
8	Compare the Ignition 1 voltage displayed on the scan tool with the actual battery voltage read with the Digital Multimeter. Do the voltages match?	--	Go to Diagnostic Aids	Go to Step 9
9	Check the PCM ignition feed circuit for a poor connection between the ignition switch and the PCM. If a problem is found, repair as necessary. Refer to Wiring Repairs . Did you find and correct the condition?	--	Go to Step 14	Go to Step 13
10	Check the generator control circuit for an open or a short to ground between the PCM and the generator. If a problem is found, repair as necessary. Refer to Wiring Repairs . Did you find and correct the condition?	--	Go to Step 14	Go to Step 11
11	Check the generator control circuit for a poor connection at the PCM. If a problem is found, repair as necessary. Refer to Intermittents and Poor Connections Diagnosis . Did you find and correct the condition?	--	Go to Step 14	Go to Step 13
12	Check the generator control circuit for a poor connection at the generator. If a problem is found, repair as necessary. Refer to Intermittents and Poor Connections Diagnosis . Did you find and correct the condition?	--	Go to Step 14	Go to Charging System Check
13	Important:: The replacement PCM must be programmed. Refer to Powertrain Control Module Replacement/Programming . Replace the PCM. Is the action complete?	--	Go to Step 14	--
14	Start and run the engine above 1000 RPM. With a scan tool, observe Ignition 1 voltage. Is the voltage between the specified values?	10-16V	System OK	Go to Step 5