DTC P1562. Chevrolet Epica 2005

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2005 🢒 Epica 🢒 Engine 🢒 Engine Controls - 2.5L (LBK) 🢒 DTC P1562

Circuit Description

The engine control module (ECM) uses the ignition 1 voltage circuit to monitor system voltage. Voltage that is out of range will cause damage to components and incorrect input readings. If the ECM detects an excessively low system voltage, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P1562 System Voltage Low

Conditions for Running the DTC

•	The ignition is ON or the engine is running.

•	DTC P1562 runs continuously once the above condition is met.

Conditions for Setting the DTC

The ECM detects a system voltage below 11 volts for more than 5 minutes.

Action Taken When the DTC Sets

•	The control module stores the DTC information into memory when the diagnostic runs and fails.

•	The malfunction indicator lamp (MIL) will not illuminate.

•	The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.

•	The driver information center, if equipped, may display a message.

Conditions for Clearing the DTC

•	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 non-emission related diagnostic.

•	Clear the DTC with a scan tool.

Step	Action	Values	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Connector End Views or Engine Control Module Connector End Views
1	Did you perform the Diagnostic System Check - Engine Controls?	--	Go to Step 2	Go to Diagnostic System Check - Engine Controls
2	Start the engine. Clear the DTC with a scan tool. Raise the engine speed above 1,500 RPM. Does DTC P1562 set?	--	Go to Step 4	Go to Step 3
3	Observe the Freeze Frame/Failure Records data for this DTC. Turn OFF the ignition for 30 seconds. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	--	Go to Step 4	Go to Intermittent Conditions
4	Measure the voltage at the battery with a DMM. Raise the engine speed above 1,500 RPM. Is the battery voltage more than the specified value?	11 V	Go to Step 5	Go to Charging System Test in Engine Electrical
5	Turn OFF the ignition. Disconnect the ECM. Important: Use the J 35616-200 Test Lamp Kit for this test. If the J 35616-200 is not available, use a test lamp that measures between 25-30 ohms. Connect a test lamp from the ignition 1 voltage circuit of the ECM to a good ground. Measure the voltage from the probe of the test lamp to battery positive voltage with a DMM. Is the voltage less than the specified value?	0.5 Volts	Go to Step 6	Go to Step 7
6	Test for intermittents and poor connections at the engine control module (ECM). Refer to Testing for Intermittent Conditions and Poor Connections and Repairing Connector Terminals in Wiring Systems. Did you find and correct the condition?	--	Go to Step 9	Go to Step 8
7	Repair the high resistance in the ignition 1 voltage circuit of the ECM. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?	--	Go to Step 9	--
8	Replace the ECM. Refer to Engine Control Module Replacement . Is the replacement complete?	--	Go to Step 9	--
9	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	--	Go to Step 2	Go to Step 10
10	Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed?	--	Go to Diagnostic Trouble Code (DTC) List	System OK