Test TC-19A - Injector Control Circuit (DTC 27)
WARNING: This page is about a different car, the 1995 Jeep Wrangler, 1995 Jeep Grand Cherokee, and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Perform TEST TC-1A
before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION
at beginning of article. For wiring diagrams, see WIRING DIAGRAMS
at the end of this article. Perform TEST VER-2A
after each repair.
- Using scan tool, erase trouble code messages. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds, if necessary. If engine started, allow engine to idle for at least 20 seconds.
- Using scan tool, read trouble code messages. 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, see INJECTOR TEST IDENTIFICATION table. Go to appropriate test.INJECTOR TEST IDENTIFICATION
Trouble Code Message Diagnostic Test INJECTOR #1 CONTROL CIRCUIT TC-19B INJECTOR #2 CONTROL CIRCUIT TC-20A INJECTOR #3 CONTROL CIRCUIT TC-21A INJECTOR #4 CONTROL CIRCUIT TC-22A INJECTOR #5 CONTROL CIRCUIT TC-23A INJECTOR #6 CONTROL CIRCUIT TC-24A - Condition required to set trouble code message is not present at this time. INJECTOR #? CONTROL CIRCUIT trouble code takes 0.64-10.0 seconds to set when no inductive kick is sensed .18 millisecond after injector turns off and with no other injectors on. Possible causes are: open or shorted injector driver circuit, open injector, open ASD power supply at injector, PCM failure or defective or damaged connector terminals or wires. Go to next step.
- Inspect all related wiring and connectors. See appropriate WIRING DIAGRAM in WIRING DIAGRAMS section. Repair wiring and connectors as necessary. If no problems were found with wiring and connectors, go to next step.
- Start engine. Wiggle wiring harness from each injector to PCM. If engine misfires or stalls, repair wiring harness as necessary. If engine does not misfire or stall, see INACTIVE DTC CONDITION in this article. Test is complete.