93 accord D4 light blinking update

When the D4 light blinks, it indicates an error has been detected by the transmission control module (TCM) and you need to retrieve the trouble code to find out what is wrong. It could result in erratic shifting and performance issues.

TCM Fault Codes
1. With ignition off, install jumper wire between terminals on service check connector. Service check connector is a 2-pin Blue connector, located at lower passenger’s corner of glove box, near kick panel. See Fig. 14 and Fig. 15. This will place TCM in self-diagnostic mode.

2. Turn ignition on. Fault codes will be displayed by blinking “D4” light on A/T gear position indicator on instrument panel.

3. Fault codes will be displayed by short and long blinks. One long blink equals 10 short blinks. For example, if a long blink is followed by 4 short blinks, this indicates Fault Code No. 14. See Fig. 16.

4. Once a fault code is obtained, determine probable cause and symptom. If any other fault codes except those listed are displayed, TCM is defective. Turn ignition off. Remove jumper wire or SCS service connector from service check connector.

NOTE:
If customer describes symptoms for Fault Code No. 3 and “D4” light is off or Fault Code No. 6, 11, it may be necessary to test drive vehicle to recreate the symptom and then check for trouble code with ignition still on.

Did you check both?

Put a paper clip, wire, connector in it to connect the two prongs.

2. Put the key in the ignition, and turn the key 2 clicks to the acc on, where all the lights light up on the dash.

3. You will now watch how many times the CEL light blinks.

a long blink = 10
a short blink = 1
It will repeat after all the codes are done.

4. Compare to this list to see what the problem is:

1 O2A – Oxygen sensor #1
2 O2B – Oxygen sensor #2
3 MAP – manifold absolute pressure sensor
4 CKP – crank position sensor
5 MAP – manifold absolute pressure sensor
6 ECT – water temperature sensor
7 TPS – throttle position sensor
8 TDC – top dead centre sensor
9 CYP – cylinder sensor
10 IAT – intake air temperature sensor
12 EGR – exhaust gas recirculation lift valve
13 BARO – atmospheric pressure sensor
14 IAC (EACV) – idle air control valve
15 Ignition output signal
16 Fuel injectors
17 VSS – speed sensor
19 Automatic transmission lockup control valve
20 Electrical load detector
21 VTEC spool solenoid valve
22 VTEC pressure valve
23 Knock sensor
30 Automatic transmission A signal
31 Automatic transmission B signal
36 traction control found on JDM ecu’s
41 Primary oxygen sensor heater
43 Fuel supply system
45 Fuel system too rich or lean
48 LAF – lean air fuel sensor
54 CKF – crank fluctuation sensor
58 TDC sensor #2
61 Primary oxygen sensor
63 Secondary oxygen sensor
65 Secondary oxygen sensor heater
71 random misfire cylinder 1
72 random misfire cylinder 2
73 random misfire cylinder 3
74 random misfire cylinder 4
80 Exhaust Gas Recirculation insufficient flow detected
86 ECT Sensor (Engine Coolant Temperature) circuit range / performance problem
90 Evaporative Emission Control System leak detected in the fuel tank area
91 Fuel Tank Pressure Sensor low input
92 Evaporative Emission Control System insufficient purge flow

TCU Codes:

CODE LIST:

1-Lock-up solenoid ‘A’ circuit open or shorted.
2-Lock-up solenoid ‘B’ circuit open or shorted.
3-Throttle Position Sensor circuit open or shorted.
4-Vehicle Speed Sensor open or shorted – No signal from speedometer.
5-Shift Lever Position Switch circuit shorted.
6-Shift Lever Position Switch circuit open.
7-Shift Solenoid ‘A’ circuit open or shorted.
8-Shift Solenoid ‘B’ circuit open or shorted.
9-Counter shaft or transmission speed pulse generator open or shorted.
10-Coolant Temperature Sensor open or shorted.
11-Engine RPM (Ignition coil signal) open or shorted.
12-(No code 12 used)
13-Main shaft speed pulse generator open or shorted.
14-Linear (line pressure control) solenoid open or shorted.
15-Kick down switch circuit shorted.

[size=4]Resetting ECU[/size]

1. Disconnect Negative battery terminal (never only take off the positive, cuz it can kill the battery when it grounds all the power out, if left for a while)

2. Look in the Under hood fuse box, find the “Hazard” Fuse. Pull it out.

3. Let the car sit for 10-15 minutes

4. Reattach neg battery terminal and put fuse back in

5. Restart car w/nothing on (radio, lights, a/c) and just let it run for a few minutes.

6. Turn off, and then it should be good to go.

What you stated you did to reset the ECU:
I tried to reset by removing negative cable then reinstalling, but still displaying blinking D4

The procedure listed:
Resetting ECU

[size=5][b]1. Disconnect Negative battery terminal (never only take off the positive, cuz it can kill the battery when it grounds all the power out, if left for a while)
[/b][/size]
2. Look in the Under hood fuse box, find the “Hazard” Fuse. Pull it out.

3. Let the car sit for 10-15 minutes

4. Reattach neg battery terminal and put fuse back in

5. Restart car w/nothing on (radio, lights, a/c) and just let it run for a few minutes.

6. Turn off, and then it should be good to go.

I’m seeing only step 1 in your description of resetting the ECU