Hi to all Punto mk2 followers….
Newbie to the forum by several weeks, owner of a Mk2 1.9 JTD…….have been reading up on the EPS issues threads to understand the various common issues.
Have had an Intermittant EPS warning light ongoing for 12 + months, transitioned last month into a permanent warning light. Throwing EPS ecu codes C1012 and C1013,
Multiecuscan software testing:-
- Vehicle speed signal from CAN reading 60kmh when ABS module shows it as 0.0kmh at stationary
- Alternator status from CAN ‘not recharging’ when alternator charging at 13.9 to 14.3 volts
Since both of the thrown codes are CAN related, I started with static tests on the OBD plug,
CAN H against CAN L = 22.75 k ohm ignition off, no where near the 60 ohm expected.
Checked earth leads and ground points:-
- Earth leads……(battery to chassis, chassis to gearbox, multi loom earth next door to chassis earth, 1 below ABS box to wheel arch, 1 below bonnet release, multi loom earth in boot)
- Uncouple and recouple gang plugs on key CM’s, using some contact spray to assist
Started to identify the different control modules intending to follow CANBUS wiring and do an isolation test on each module to try and isolate down to 60 ohm, came up with:-
- Main ECU (windscreen valence area of engine bay)
- EPS ECU (Steering column)
- Airbag CM (floor mounted centre tunnel, under dashboard)
- ABS ECU (engine bay, passenger side firewall)
- Integrated ECU / Fuse board (drivers right knee)
I am struggling with the following questions:-
1. Not sure about relevance of Dashboard clocks…..yes in Canbus loop but are they a Control Module
2. Fuse box in engine bay, looks like a straight fuse box despite the gang plug connections on the back.
3. Struggling to get a good wiring diagram for Canbus for the 1.9 JTD, particular CANBUS wiring colouring for CAN H and CAN L loops
4. Struggling to understand which CM’s are fitted with termination resistors, so I can target the additional ones 1st. (I am guessing but would opt to Main ECU and Integrated Delphi Unit & Fuse board by drivers knee)
I would welcome any suggestions about C1012 and C1013 fixes apart from follow up on the above.
Many thanks