I Got 2 ECU Codes P1298 and P1519

JrCivicEX02Coup · 08-29-2007

Any comments or suggestions would be greatly appreciated, I drive a 2002 honda civic ex coupe, and it has 55 000 miles.

P1298-Electric Load Detector Circuit High Input (Manufacturer Controlled Fuel and Air Metering)

P1519-RACV Wire/Internal Circuit Malfunction (Manufacturer Controlled Vehicle Speed, Idle Control, and Auxiliary Input)

What does this mean? How can I fix this? What would be the estimate cost of this?

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Eightball · 09-14-2007

Did you find out what it was? My car was screwing up today and I got P0122 for the TPS and P1298.

speedfoos · 09-15-2007

Let me do some digging for the troubleshooting procedures.

Eightball, have you messed with your TB or throttle cables at all? I threw a P0122 when I took too much slack out of the TB cable.

I'll be back in a few!

speedfoos · 09-15-2007

OK. Here's how to diagnose the P1298 error.

DTC P1298: ELD Circuit High Voltage

1. Reset the ECM/PCM (see HOW TO RESET THE ECM/PCM ).
2. Start the engine.
3. Turn on the headlights.

Is DTC P1298 indicated?

YES - Go to step 4.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ELD and at the ECM/PCM.

4. Turn the ignition switch and headlights OFF.
5. Disconnect the ELD 3P connector.
6. Turn the ignition switch ON (II).
7. Measure voltage between body ground and ELD 3P connector terminal No. 1.

Fig. 120: Measuring Voltage Between Body Ground & ELD 3P Connector Terminal No. 1

Is there battery voltage?

YES - Go to step 8.
NO - Check the No. 4 ACG (10A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 4 ACG (10A) fuse and the ELD.

8. Turn the ignition switch OFF.
9. Connect ELD 3P connector terminal No. 3 to body ground with a jumper wire.

Fig. 121: Connecting ELD 3P Connector Terminal No. 3 To Body Ground With Jumper Wire

10. Disconnect ECM/PCM connector E (31P).
11. Check for continuity between body ground and ECM/PCM connector terminal E15.

Fig. 122: Checking Continuity Between Body Ground & ECM/PCM Connector Terminal E15

Is there continuity?

YES - Go to step 12.
NO - Repair open in the wire between the ECM/PCM (E15) and the ELD.

12. Check for continuity between ELD 3P connector terminal No. 2 and body ground.

Fig. 123: Checking Continuity Between ELD 3P Connector Terminal No. 2 & Body Ground

Is there continuity?

YES - Go to step 13.
NO - Repair open in the wire between ELD and G201.

13. Reconnect the ELD 3P connector and ECM/PCM connector E (31P).
14. Start the engine and let it idle.
15. While measuring voltage between ECM/PCM connector terminals A24 and E15, turn the headlights on (high).

Fig. 124: Measuring Voltage Between ECM/PCM Connector Terminals A24 & E15

Does the voltage drop?

YES - Update the ECM/PCM if it does not have the latest software, or
substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.
NO - Replace the ELD.

speedfoos · 09-15-2007

Here's the for P1519. I'll put the pics up tonight (UK time) I've got to run to coach a soccer game.

DTC P1519: IAC Valve Circuit Malfunction

1. Reset the ECM/PCM (see HOW TO RESET THE ECM/PCM ).
2. Turn the ignition switch ON (II).

Is DTC P1519 indicated?

YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Check for poor
connections or loose terminals at the IAC valve and at the ECM/PCM.

3. Turn the ignition switch OFF.
4. Disconnect the IAC valve 3P connector.
5. Turn the ignition switch ON (II).
6. Measure voltage between IAC valve 3P connector terminal No. 2 and body ground.

Fig. 4: Measuring Voltage Between IAC Valve 3P Connector Terminal No. 2 & Body Ground

Is there battery voltage?

YES - Go to step 7.
NO - Repair open in the wire between the IAC valve and the PGM-FI main relay.

7. Turn the ignition switch OFF.
8. Check for continuity between body ground and IAC valve 3P connector terminal No. 1.

Fig. 5: Checking Continuity Between Body Ground & IAC Valve 3P Connector Terminal No. 1

Is there continuity?

YES - Go to step 9.
NO - Repair open in the wire between the IAC valve and G101.

9. Disconnect ECM/PCM connector A (31P).
10. Check for continuity between body ground and ECM/PCM connector terminal A12.

Fig. 6: Checking Continuity Between Body Ground & ECM/PCM Connector Terminal A12

Is there continuity?

YES - Repair short in the wire between the IAC valve and the ECM/PCM (A12).
NO - Go to step 11.

11. Connect IAC valve 3P connector terminal No. 3 to body ground with a jumper wire.

Fig. 7: Connecting IAC Valve 3P Connector Terminal No. 3 To Body Ground With Jumper Wire

12. Check for continuity between ECM/PCM connector terminal A12 and body ground.

Fig. 8: Checking Continuity Between ECM/PCM Connector Terminal A12 & Body Ground

Is there continuity?

YES - Go to step 13.
NO - Repair open in the wire between the IAC valve and the ECM/PCM (A12).

13. Reconnect the IAC valve 3P connector.
14. Turn the ignition switch ON (II).
15. Measure voltage between body ground and ECM/PCM connector terminal A12.

Fig. 9: Measuring Voltage Between Body Ground & ECM/PCM Connector A12

Is there battery voltage?

YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck . If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.
NO - Replace the IAC valve

speedfoos · 09-23-2007

There you go, pics are added.

JrCivicEX02Coup · 09-24-2007

speedfoos you ROCK thanks a lot man !!!!!!!!!!!!!!!!!!

Eightball · 10-01-2007

Sooooo.....Honda charged me $500 to replace the TB and the ELD. My car is still screwed up and just got a P1251 today. Any guesses on what actually is screwed up if it wasn't my tps or eld sensors????

bbrian12 · 01-14-2008

i got the same p1298 code
i replaced both o2 sensors, air filter, new plugs, a full tank of 93 octane gas and a bottle of fuel injector cleaner. and reset the computer.
so far the car is running good and the check engine light is off
so i think one or both the o2 sensors went bad
each sensor is about 50$

utahbmxer · 10-22-2008

Not to revive an old thread, but I was going through the troubleshooting steps in my service manual (seems to be the same here), but I can not find the ECM/PCM Connector A (31p). Where is this located? Doesn't seem to be on either of the fuse boxes (hood or under dash). Been getting P1298, P0300-P0304.

Thanks,
utahbmxer

gearbox · 10-22-2008

isnt that the connector plugged to the ecu? behind the glove box?

bbrian12 · 10-23-2008

replace the v-tec solenoid

gearbox · 10-23-2008

thats only for p1258