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.
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HOMESERVICE MANUALSHONDA1993ACCORD L4-2156CC 2.2L SOHCREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLERELAYS AND MODULES - A/TCONTROL MODULETESTING AND INSPECTION
1993 Honda Accord L4-2156cc 2.2L SOHC
Control Module: Testing and Inspection
1993 Honda Accord L4-2156cc 2.2L SOHCSECTION Testing and Inspection
TROUBLESHOOTING PROCEDURES
When the TCM senses an abnormality in the input or output Systems, the [D4] indicator light in the gauge assembly will blink. However, when the Service Check Connector (located to the lower right of the glove compartment) is connected with a jumper wire, the [D4] indicator light will blink the Diagnostic Trouble Code (DTC) when the ignition switch is turned on.
When the [D4] indicator light has been reported on, connect the two terminals of the Service Check Connector together. The turn on the ignition switch and observe either the [D4] indicator light.
Codes 1 through 9 are indicated by individual short blinks, Codes 10 through 15 are indicated by a series of long and short blinks. One long blink equals 10 short blinks. Add the long and short blinks together to determine the code. After determining the code, refer to the electrical system Diagnosis By Symptom, Symptom-to-Component Chart. Testing and Inspection
Some PGM-FI problems will also make the [D4] indicator light come on. After repairing the PGM-FI system, disconnect the Back Up fuse (7.5 A) in the under-hood fuse/relay box for more than 10 seconds to reset the TCM memory.
NOTE:
- Disconnecting the Back up fuse also cancels the radio anti-theft code, preset stations and the clock setting. Get the customer's code number and make note of the radio presets before removing the fuse so you can reset them.
- The PGM-FI system on this model is a sequential multiport fuel injection system.
When the TCM senses an abnormality in the input or output Systems, the [D4] indicator light in the gauge assembly will blink. However, when the Service Check Connector (located to the lower right of the glove compartment) is connected with a jumper wire, the [D4] indicator light will blink the Diagnostic Trouble Code (DTC) when the ignition switch is turned on.
When the [D4] indicator light has been reported on, connect the two terminals of the Service Check Connector together. The turn on the ignition switch and observe either the [D4] indicator light.
Codes 1 through 9 are indicated by individual short blinks, Codes 10 through 15 are indicated by a series of long and short blinks. One long blink equals 10 short blinks. Add the long and short blinks together to determine the code. After determining the code, refer to the electrical system Diagnosis By Symptom, Symptom-to-Component Chart. Testing and Inspection
Some PGM-FI problems will also make the [D4] indicator light come on. After repairing the PGM-FI system, disconnect the Back Up fuse (7.5 A) in the under-hood fuse/relay box for more than 10 seconds to reset the TCM memory.
NOTE:
- Disconnecting the Back up fuse also cancels the radio anti-theft code, preset stations and the clock setting. Get the customer's code number and make note of the radio presets before removing the fuse so you can reset them.
- The PGM-FI system on this model is a sequential multiport fuel injection system.
RENDER: 1.0x
NO RELATED
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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.