Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPLYMOUTH1984HORIZON BASE, 1.6 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 9 (ENGINE CONTROLS - TESTS W/CODES - 3.5L)SELF-DIAGNOSTIC TESTSTEST TC-29A - INJECTOR CONTROL CIRCUITS (DTC 27)
1984 Plymouth Horizon Base, 1.6 A
Test TC-29A - Injector Control Circuits (DTC 27)
1984 Plymouth Horizon Base, 1.6 ASECTION Test TC-29A - Injector Control Circuits (DTC 27)
WARNING: This page is about a different car, the 1994 Eagle Vision, 1994 Dodge Intrepid, 1994 Chrysler New Yorker, 1994 Chrysler LHS, and 1994 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For circuit & connector terminal identification, see CONNECTOR IDENTIFICATION DIRECTORY TABLE
. For wiring diagrams, see WIRING DIAGRAMS
section. After each repair, perform TEST VER-2
.
- Using DRB, erase trouble codes. Attempt to start engine. If necessary, crank engine for at least 10 seconds. Using DRB, read trouble codes. Allow engine to idle for at least 20 seconds. If DRB displays any injector control circuit codes, see INJECTOR CONTROL CIRCUIT CODES table and perform corresponding test. If DRB does not display any injector control circuit codes, go to next step.INJECTOR CONTROL CIRCUIT CODES
DRB Display Test No. Control Circuit Injector No. 1 TC-29D Injector No. 2 TC-30C Injector No. 3 TC-31C Injector No. 4 TC-32C Injector No. 5 TC-33C Injector No. 6 TC-34C - At this time, the condition required to set trouble code is not present. INJECTOR CONTROL CIRCUIT trouble code sets when Powertrain Control Module (PCM) does not detect injector turn off edge when expected. Possible causes are: open or shorted injector control circuit, open power supply, open injector, or failed driver in PCM.
- Inspect wiring and connectors. Repair as required. If wiring and connectors are okay, start engine. Wiggle wiring harness and connectors from injector to PCM. If engine misses or stalls when wiring harness and connectors are wiggled, repair area where wiggling caused problem to appear. If engine does not miss or stall when wiring harness and connectors are wiggled, see INACTIVE TROUBLE CODE CONDITION this article. Test is complete.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.