GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Epica 🢒 Engine 🢒 Engine Controls - 2.0L (L34 GMDAT) 🢒 DTC 017

Circuit Description

When the ignition switch is turned to ON or START, the electronic control module (ECM) will energize and de-energize the fuel injector solenoid coil. With the solenoid coil energized, a plunger is activated, which allows pressurized fuel to be sprayed through the fuel injector into the combustion chamber where it is mixed with air from the intake manifold. This creates the proper air/fuel mixture needed for combustion.

Conditions for Setting the DTC
    • The fuel pump is running.
    • Battery voltage is greater than 9 volts.
    • A fuel injector fault has been detected over 3 times of successive 1 second intervals.

Step

Action

Values

Yes

No

1

Was the Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Engine Controls

2
  1. Disconnect the fuel injector harness from all of the fuel injectors.
  2. Turn the ignition ON.
  3. Measure the voltage at all of the fuel injector harness terminals.

Is battery voltage present on the 1 terminal only of each connector?

--

Go to Step 3

Go to Step 8

3

Connect a fuel injector test light to each of the fuel injector harness connector while cranking the engine.

Does the test light blink on all connectors?

--

Go to Step 13

Go to Step 4

4

Does the fuel injector test light stay OFF for 1 or more of the fuel injectors?

--

Go to Step 6

Go to Step 5

5

Does the fuel injector test light stay ON for 1 or more fuel injectors?

--

Go to Step 11

--

6
  1. Inspect for a short to battery positive between the fuel injector harness connector terminal 2 and the ECM connector terminal C4 for fuel injectors 1 and 4.
  2. Inspect for a short to battery positive between the fuel injector harness connector terminal 2 and the ECM connector terminal C6 for fuel injectors 2 and 3.

Is the problem found?

--

Go to Step 7

Go to Step 15

7
  1. Repair the short to battery positive as needed.
  2. Connect an injector test light to each injector harness connector while cranking the engine.

Does the test light blink on all connectors?

--

Go to Diagnostic System Check - Engine Controls

--

8

Is battery voltage not present at the 1 terminal of any injector harness connector?

--

Go to Step 10

Go to Step 9

9

Is battery voltage present at the 2 terminal of any injector harness connector?

--

Go to Step 6

--

10
  1. Inspect for a short to ground in the fuel injector harness.
  2. Inspect the fuel injector harness connectors for damaged terminals.
  3. Perform the repairs as needed.
  4. Inspect for battery voltage at the 1 terminals of all of the fuel injector harness connectors.

Is battery voltage present on the 1 terminal only of each connector?

--

Go to Step 3

--

11
  1. Inspect for a short to ground between the fuel injector harness connector terminal 2 to ECM connector terminal C4 for injectors 1 and 4.
  2. Inspect for a short to ground between the fuel injector harness connector terminal 2 to ECM connector terminal C6 for injectors 2 and 3.

Is the problem found?

--

Go to Step 12

Go to Step 15

12
  1. Repair the short to ground as needed.
  2. Connect a fuel injector test light to each of the fuel injector harness connectors while cranking the engine.

Does the test light blink on all connectors?

--

Go to Step 13

Go to Step 4

13

Important: The resistance will increase slightly at higher temperatures.

Measure the resistance of each fuel injector.

Is the fuel injector resistance within the value specified?

11.8-12.6 ohms

System OK

Go to Step 14

14
  1. Replace any of the fuel injectors with a resistance that is out of specification. Refer to Fuel Injection Fuel Rail Assembly Replacement .
  2. Clear any DTCs from the ECM.
  3. Perform the Diagnostic System Check.

Is the repair complete?

--

System OK

--

15
  1. Replace the ECM. Refer to Engine Control Module Replacement .
  2. Perform the Diagnostic System Check.

Is the repair complete?

--

System OK

--