Jrad
28th August 2015, 12:38 PM
Car - 1989 AW11 Supercharged 4agze - running SC14 supercharger.
motor / part in question - ECU code 52 (knock sensor) and cooling fans
problem -
Hi guys, two issues that I believe aren't related.
Issue #1
Engine light comes on when driving. I have run diagnostics and it's telling me ECU code 52, knock sensor.
I've done a little research and apparently it's common on 4agze, especially ones that are running more than factory boost.
Is it something I should be concerned about? The engine seems to be running fine.
Is there an easy way to rectify it/stop it from throwing the code, other than pull the dash light out?
Issue #2
I believe that the radiator and side vent fans aren't kicking in when up to temp, and I don't have a working temp gauge on the dash.
I have done some troubleshooting:
If I disconnect the fans, they go into failsafe mode and run constantly - so they work.
I have tested the back of the dash with an ohm meter, and it's reading correctly.
I have checked the fuse for the dash (also runs oil pressure and fuel) and it's fine.
When switching the air-con on, the front fans kick in, then shut off and the light flashes on the A/C switch in the cockpit. It has been gassed and checked for leaks.
At this stage, I believe it may be a temperature sensor/sender. However there are 2 or 3 on the engine. The one at the back of the head is a single wire plug?
Would this sensor also cause the engine to idle a little high (1,500rpm) and run rich? If it's telling the ECU that the car is cold?
According to the BGB, there is also one at the front of the head - although it's hard to find in an AW11 engine bay.
Where do I go from here to rectify either, or both, issues?
Thank you in advance,
Jarrad.
motor / part in question - ECU code 52 (knock sensor) and cooling fans
problem -
Hi guys, two issues that I believe aren't related.
Issue #1
Engine light comes on when driving. I have run diagnostics and it's telling me ECU code 52, knock sensor.
I've done a little research and apparently it's common on 4agze, especially ones that are running more than factory boost.
Is it something I should be concerned about? The engine seems to be running fine.
Is there an easy way to rectify it/stop it from throwing the code, other than pull the dash light out?
Issue #2
I believe that the radiator and side vent fans aren't kicking in when up to temp, and I don't have a working temp gauge on the dash.
I have done some troubleshooting:
If I disconnect the fans, they go into failsafe mode and run constantly - so they work.
I have tested the back of the dash with an ohm meter, and it's reading correctly.
I have checked the fuse for the dash (also runs oil pressure and fuel) and it's fine.
When switching the air-con on, the front fans kick in, then shut off and the light flashes on the A/C switch in the cockpit. It has been gassed and checked for leaks.
At this stage, I believe it may be a temperature sensor/sender. However there are 2 or 3 on the engine. The one at the back of the head is a single wire plug?
Would this sensor also cause the engine to idle a little high (1,500rpm) and run rich? If it's telling the ECU that the car is cold?
According to the BGB, there is also one at the front of the head - although it's hard to find in an AW11 engine bay.
Where do I go from here to rectify either, or both, issues?
Thank you in advance,
Jarrad.