Sos

[ahmedstudio]

SOS: DTC code P1659 ETCS Relay Off Malfunction
Civic Reborn 7th generation 2007, PKDM
Chassis code is NFBFD1
Engine code is R18A1

Is the ETCS Relay located in fuse box? or if the throttle motor itself is the relay?

If possible kindly share the diagram.

@Xulfiqar @rajaatta @Hassan1991

[Hassan1991]

No. There is a relay located inside then engine bay fuse box for ETCS.
Check it.
Here.

https://fusecheck.com/honda/honda-civic-2006-2011-fuse-diagram

[ahmedstudio]

Thank you so much. Is this diagram valid for PKDM CIVIC 2007? Chassis code is NFBFD1 Engine code is R18A1

Also, I'll share the history of problem. The code generated due to negligence of electrician who bypassed the compressor relay during AC work. ECU got short. That's for dead ECU I guess. I got the ECU repaired, now the following 2 codes are showing:

P1659 (ETCS RELAY OFF MALFUNCTION)
Error is Current and Temporary

P0603 (PCM/PCM INTERNAL CIRCUIT MALFUNCTION, KEEP ALIVE MEMORY KAM ERROR)
Error is Current and Temporary

Since an electrical short happened, should I check all the ground connections, fuses, relays, wiring, sparking, wire melts etc? Anything you would like to recommend? How should I go about the whole thing? What should be the order of job in priority?

The car is a bomb at the moment I guess. I'm not taking it out of workshop before all necessary safety checks.

@hassan1991 @rajaatta @xulfiqar

[Hassan1991]

Yes will be similar.
That doesn't sound right.
Yes check all the fuses and relays. If you ask me, you might need to change the ecu but let's hope it's not the case.

[ahmedstudio]

Instead of checking fuses, relays, wiring etc, should I just straightaway replace the whole fuse box, wiring, relays etc? What would you recommend. Checking/repairing or replacing? How should I check all ground connections?

Also, both the error codes P1659 / P0603 are showing as Current and Temporary

@hassan1991 @xulfiqar @rajaatta

[Hassan1991]

If the damage is not deep you can get it repaired (talking about wiring). Otherwise replacing is a better solution. Add ecu in you list as well because P0603 can be a sign of bad ecu.
First get ETCS relay and the ecu memory wiring sorted, reset it and see if any of the error returns. If it does then Replace.

[ahmedstudio]

Ok. That's how I have prioritized the order of getting things done.

P0603 surfaced after I got the ECU repaired. Before the repair there was dead ECU error and battery sign wasn't showing up up on turning the ignition on. After the repair I got this Keep Alive Memory error P0603 however the instrument cluster is showing all the signs up on turning on the ignition (not starting), perhaps the Immobilizer key needs to be programmed?

@hassan1991 @rajaatta @xulfiqar

[Hassan1991]

A blown fuse can also cause this error. That's why first sort the things then proceed.
Yes you need to reprogram immobilizer.
Or before replacing the ecu you can show the electrician this error and ask him to check the respective components.

[ahmedstudio]

The link you shared mentions various fuse boxes in various locations (engine compartment, under the glove box, under the steering) for ECM and ECTS fuses. I should check the fuses for ECM and ECTS in all those locations or just the fuse box under the hood only?

[Hassan1991]

For ECTS just under the hood.
For ECU start from under the hood.

[ahmedstudio]

OK. If I have to replace the ECU, should I also replace the complete wiring and all fuse boxes too...to be on safer side...? Keeping in mind that it is a case of electric short due to bypass of AC relay.

[rajaatta]

ECM fried sorry about the loss.

For small checks go for fuse inspection and if they are fine ECM is not triggering voltage for Throttle body.