Refer to
Fuel Injection Controls
.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step determines if the ignition feed circuit to the injectors are OK.
-
This step determines if the injector control circuits are OK.
-
This step determines if there is an internal vehicle control module (VCM) short to ground for an injector control circuit.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||
Is the test lamp on for all the injector feed circuits? | -- | |||
3 | Is the test lamp on for only some of the injector feed circuits? | -- | ||
4 | Check the injector fuse. Is the fuse open? | -- | ||
5 | Check for an open on the effected injector feed circuits. Was a problem found? | -- | -- | |
Does the injector test lamp flash for each injector? | -- | |||
7 | Is the injector test lamp on steady for any injector circuit? | -- | ||
Is the injector test lamp OFF? | -- | |||
9 | Check for an open injector control circuit. Was a problem found? | -- | ||
10 | Check for a short to ground on the injector feed circuit. Was a problem found? | -- | -- | |
11 | Repair the open or short to ground on all of the injector feed circuits. Is the action complete? | -- | -- | |
12 | Repair circuit as necessary. Refer to Wiring Repairs in Wiring Systems. Is the action complete? | -- | -- | |
13 | Repair short to ground in the injector control circuit. Refer to Wiring Repairs in Wiring Systems. Is the action complete? | -- | -- | |
14 | Check the terminal contact at the VCM. Was a problem found? | -- | ||
15 | Repair terminal contact as necessary. Is action complete? | -- | -- | |
16 |
Important: The replacement VCM must be programmed. Replace the VCM. Refer to VCM Replacement/Programming . Is the action complete? | -- | -- | |
17 |
Important:: Before starting the engine, it may be necessary to check for fuel flooded cylinders or oil contamination of the fuel.
Does the engine start and continue to run? | -- | ||
18 |
Are any DTCs displayed that have not been diagnosed? | -- | Go to the applicable DTC table | |
19 | Use the scan tool in order to display the Capture Info and the Review Capture Info function. Are there any DTCs displayed that have not been diagnosed? | -- | Go to the applicable DTC table | System OK |
