Injector Control Circuit (DTC 27)

NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS - 2.5L FLEXIBLE FUEL article.

Using scan tool, erase trouble codes. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds.
Using scan tool, read trouble codes. If engine started, allow engine to idle for at least 20 seconds. If scan tool displays INJECTOR CONTROL CIRCUIT, go to step 6). If scan tool does not display INJECTOR CONTROL CIRCUIT, condition required to set trouble code is not present at this time. Go to next step.
The INJECTOR CONTROL CIRCUIT trouble code takes .64-10 seconds to set if Powertrain Control Module (PCM) does not detect an inductive kick .18ms after injector turn off with no other injectors on. Possible causes are: open or shorted injector ground circuit, open injector power supply circuit, open injector or failed driver in PCM. Go to next step.
Inspect all related wiring and connectors and repair as necessary. Perform TEST VER-2. If no problems were found with wiring and connectors, go to next step.
Start engine. Wiggle wiring harness from injector to PCM. If engine misfired or stalled, repair wiring harness as necessary. Perform TEST VER-2. If engine did not misfire or stall, see INACTIVE TROUBLE CODE CONDITION. Perform TEST VER-2.
Injector diagnosis for SFI vehicles is different. See INJECTOR TROUBLE CODE table.

2.5L INJECTOR TROUBLE CODE

Trouble Code	Go To
INJECTOR #1 CONTROL CIRCUIT	TC-13C
INJECTOR #2 CONTROL CIRCUIT	TC-14A
INJECTOR #3 CONTROL CIRCUIT	TC-15A
INJECTOR #4 CONTROL CIRCUIT	TC-16A