Test TC-24A - Injector Control Circuits (DTC 27)
WARNING: This page is about a different car, the 1995 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION
in this article. For wiring diagram, see WIRING DIAGRAMS
section at the end of this 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 starts, allow engine to idle for at least 20 seconds. 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. If scan tool displays INJECTOR CONTROL CIRCUIT, go to appropriate test. See INJECTOR TROUBLE CODES table.INJECTOR TROUBLE CODES
Trouble Code Go To INJECTOR #1 CONTROL CIRCUIT TC-24B INJECTOR #2 CONTROL CIRCUIT TC-25A INJECTOR #3 CONTROL CIRCUIT TC-26A INJECTOR #4 CONTROL CIRCUIT TC-27A INJECTOR #5 CONTROL CIRCUIT TC-28A INJECTOR #6 CONTROL CIRCUIT TC-29A INJECTOR #7 CONTROL CIRCUIT TC-30A INJECTOR #8 CONTROL CIRCUIT TC-31A - INJECTOR CONTROL CIRCUIT trouble code sets if Powertrain Control Module (PCM) does not detect an inductive kick .18ms after injector turn-off with no other injectors on. Battery voltage must be more than 12 volts, ASD relay energized, injector pulse width less than 10ms with engine speed less than 3000 RPM. Possible causes are: open or shorted injector control circuit, open injector power supply circuit, open injector or failed PCM. Go to next step.
- Inspect all related wiring and connectors. Repair as necessary. Perform TEST VER-2 . If no problems are found with wiring and connectors, go to next step.
- Start engine. Wiggle the wiring harness from the injectors to the PCM. If the engine misfires or stalls, repair wiring harness as necessary. Perform TEST VER-2 . If the engine does not misfire or stall, see INACTIVE TROUBLE CODE CONDITION in this article. Perform TEST VER-2 .