Cav 2.0 CDX - Fuel Injection Relay

[M234OWP]

Is there someone out there who could tell me where this little bugger resides? I'm getting a fault code 29, which relates to the relay, but having checked the three places I was told to look in (engine bay fusebox, fusebox under dash, relay bank under dash) it is nowhere to be seen! It's driving me absolutely flippin mental!!

Please point me in the right direction before my brain explodes!!

[branny361]

take the kick panel off next to the bonnet pull in the drivers footwell ....square black box next to some connecters .....see it ? thats the baby

[M234OWP]

THANK YOU!!!!!

You're a life saver Branny!

[M234OWP]

Now this is a real pain in the butt! I replaced the relay but still am getting the same fault displayed. Do I need to somehow reset the eml to clear the fault?

[skream uk]

try disconnecting the battery for 10mins m8

[M234OWP]

I'll give that a go in the morning. Cheers matey!

[branny361]

Is there someone out there who could tell me where this little bugger resides? I'm getting a fault code 29, which relates to the relay, but having checked the three places I was told to look in (engine bay fusebox, fusebox under dash, relay bank under dash) it is nowhere to be seen! It's driving me absolutely flippin mental!!

Please point me in the right direction before my brain explodes!!

can I ask you what's wrong with your car?

checking the code you say you have 29 . This only shows on a GM mulitec ecu but i am sure the xev engine has a simtec 56.0 56.1 ecu and according to www.topbuzz.co.uk there is NO fault code 29

Try flashing the code again you may have it wrong


Mark

[branny361]

one ..one two = 12 initializing code
one.. one two = 12 initializing code
one.. one two = 12 initializing code

then the fault code(s)

and back to

one ..one two = 12 initializing code
one.. one two = 12 initializing code
one.. one two = 12 initializing code

[M234OWP]

Deffo fault code 29. EML blinks 12 three times, then 19 then 29 three times then 12 three times. Actually the fuel relay did look a bit suspect, the case had been split. However, have tried two known good relays and neither has worked and I'm unable to clear the code.

According to my book, on US V6 cars, code 29 is a fault on injector 5, non US cars it is the fuel inj relay that's at fault. Anyway, now I'm at a loss as to which way to go with it.

[branny361]

these are the codes for the xev engine corresponding to the ecu you have fitted

Code: Item: Fault:

12 Initiation of diagnosis. n/a
13 Oxygen sensor Open circuit
14 Coolant temperature sensor Voltage low
15 Coolant temperature sensor Voltage high
16 Knock sensor signal circuit No change in voltage
19 Incorrect Revs per Minute (RPM) signal (crankshaft sensor) Incorrect signal, check sensor
21 Throttle position sensor (TPS) Voltage high
22 Throttle position sensor (TPS) Voltage low
23 Knock control module signal Out of range
24 Vehicle speed signal (VSS) No signal
25 Injector valve 1 Voltage high
26 Injector valve 2 Voltage high
27 Injector valve 3 Voltage high
28 Injector valve 4 Voltage high
37 Check light (fault code lamp) Voltage low
38 Oxygen sensor circuit Voltage high
39 Oxygen sensor circuit Voltage low
44 Oxygen sensor Lean exhaust (weak mixture)
45 Oxygen sensor Rich exhaust (rich mixture)
48 Battery Voltage low
49 Battery Voltage high
52 Check light (fault code lamp) Voltage high
53 Fuel pump relay Voltage low
54 Fuel pump relay Voltage high
55 Engine Control Unit (ECU) faulty Check chassis earth and ECU connector.
56 Idle air control Voltage high
57 Idle air control Voltage low
61 Fuel tank vent valve Voltage low
62 Fuel tank vent valve Voltage high
69 Intake air temperature sensor Voltage low
71 Intake air temperature sensor Voltage high
73 Mass air flow temperature Voltage low
74 Mass air flow temperature Voltage high
75 Torque control (automatic) Voltage low
76 Torque control (automatic) Continuous signal, ignition retard long
81 Injector valve 1 Voltage low. Injector short circuit to ground.
82 Injector valve 2 Voltage low. Injector short circuit to ground.
83 Injector valve 3 Voltage low. Injector short circuit to ground.
84 Injector valve 4 Voltage low. Injector short circuit to ground.
87 Air Conditioning (A/C) cut-off relay Voltage low
88 Air Conditioning (A/C) cut-off relay Voltage high
91 Oxygen sensor heater Voltage high
92 Camshaft sensor Incorrect signal
98 Oxygen sensor heater Voltage low, open circuit


there is no 29 ??? now im puzzled??

[M234OWP]

Right this just gets weirder! I have rechecked the eml light codes again and I now get the following codes, 12 - 1 - 92 - 12. I'm now assuming that the fault (92) lies with the cam sensor, no idea at all what the lone 1 blink is all about.

[branny361]

this is where ecotecs get the bad reputation , for having too many sensors and hardly a week goes by before the eml light start moaning somethings wrong


1. does the car run ?
2. if it does is the light on when you drive it ?
3 .never heard of code 1?
4 .92 yes . try cleaning the connections on the plug check the wire for damage (the one that's clipped along the edge of the cam cover next to the pulleys. the camshaft one sits between the 2 front sprockets

Its a long shot but so far you seem to have had a cam and crank sensor code . I would start by either substituting a known good one or try a replacement from a local motor factors

let me know how you get on

[M234OWP]

Success!!

Replaced the cam sensor on the Cav with the one off my Pineapple Sport and she started up much cleaner, no eml and a nice even tickover. Now I've just got to get another sensor to put back in my Astra!

Cheers for all the advice, it's been much appreciated!

[branny361]

Glad you sorted it out ....