Hi all, as the title suggests, I'm after a wiring diagram for Australian delivered FZJ80R's.
Specs on my 80 are as follows;
1993
1FZFE
GXL
Manual
Right Hand Drive
Australian Delivered (99% sure of this)
Pre catalytic converter oxygen 02 sensor
No EGR
I am currently diagnosing an issue with intermittent stuttering and running on a couple of cylinders after heavy rain and wind combo. I've owned the vehicle for 4 years and haven't experienced these issues until this year with the wild weather on the south east coast of Australia. Happened once in January and once again now in late March. The fault seems to go away on its own after a few days but not after the engine is at operating temperature and driving.
Fault is still present at time of post.
When I managed to limp the car home I had cleaned out all EFI and ignition system connectors with contact cleaner, allowed them to dry out completely before reassembling.
None of them had water ingress or any signs of corrosion or damage.
MAF has been cleaned, Distributor has been cleaned.
Airbox and filter also dry with no signs of water ingress.
Accordion air pipe also dry with no signs of water ingress or cracks or leaks.
I have been in the process of replacing items as preventative maintenance. All the following parts are OEM Toyota parts.
Distributor cap, Distributor button, HT leads, Coil, Spark plugs (Bosch Platinum Iridium + checked gaps)
Fuel pressure regulator, In tank fuel pump, Fuel pump relay
Knock sensors x2
Coolant temp sensor for ECU
I also have a set of genuine injectors and genuine fuel filter ready to go in when I have the time.
After checking codes, I found I have Diagnostic Trouble Code (DTC) 42 which from research is a problem with the Throttle Position Sensor (TPS).
The reason I am chasing a wiring diagram so specific is because the wiring diagram I've been using doesn't seem to be correct as I have found a discrepancy between what the 1994 wiring diagram says and what is on my plug for the ECU. Please refer to the photos attached for what I'm talking about.
So, the middle ECU plug, from right to left starts at pin number 09 and finishes on 16.
Pin 10 (VTA) is a green wire with a black trace (correct as per the photo and wiring diagram)
Pin 11 (IDL) is a green wire with a red trace (incorrect as per the photo and wiring diagram)
Pin 12 is a green wire with a white trace as per the photo.
As you can clearly see, pin 11 is green with a red trace (VC) on the ECU but as per the wiring diagram this is incorrect.
After doing continuity tests, I have confirmed the pins on the TPS are in fact correct and correspond with their colours, however their wiring to the ECU has completely thrown me off.
Thoughts on this? Surely it's something I've missed right?
Specs on my 80 are as follows;
1993
1FZFE
GXL
Manual
Right Hand Drive
Australian Delivered (99% sure of this)
Pre catalytic converter oxygen 02 sensor
No EGR
I am currently diagnosing an issue with intermittent stuttering and running on a couple of cylinders after heavy rain and wind combo. I've owned the vehicle for 4 years and haven't experienced these issues until this year with the wild weather on the south east coast of Australia. Happened once in January and once again now in late March. The fault seems to go away on its own after a few days but not after the engine is at operating temperature and driving.
Fault is still present at time of post.
When I managed to limp the car home I had cleaned out all EFI and ignition system connectors with contact cleaner, allowed them to dry out completely before reassembling.
None of them had water ingress or any signs of corrosion or damage.
MAF has been cleaned, Distributor has been cleaned.
Airbox and filter also dry with no signs of water ingress.
Accordion air pipe also dry with no signs of water ingress or cracks or leaks.
I have been in the process of replacing items as preventative maintenance. All the following parts are OEM Toyota parts.
Distributor cap, Distributor button, HT leads, Coil, Spark plugs (Bosch Platinum Iridium + checked gaps)
Fuel pressure regulator, In tank fuel pump, Fuel pump relay
Knock sensors x2
Coolant temp sensor for ECU
I also have a set of genuine injectors and genuine fuel filter ready to go in when I have the time.
After checking codes, I found I have Diagnostic Trouble Code (DTC) 42 which from research is a problem with the Throttle Position Sensor (TPS).
The reason I am chasing a wiring diagram so specific is because the wiring diagram I've been using doesn't seem to be correct as I have found a discrepancy between what the 1994 wiring diagram says and what is on my plug for the ECU. Please refer to the photos attached for what I'm talking about.
So, the middle ECU plug, from right to left starts at pin number 09 and finishes on 16.
Pin 10 (VTA) is a green wire with a black trace (correct as per the photo and wiring diagram)
Pin 11 (IDL) is a green wire with a red trace (incorrect as per the photo and wiring diagram)
Pin 12 is a green wire with a white trace as per the photo.
As you can clearly see, pin 11 is green with a red trace (VC) on the ECU but as per the wiring diagram this is incorrect.
After doing continuity tests, I have confirmed the pins on the TPS are in fact correct and correspond with their colours, however their wiring to the ECU has completely thrown me off.
Thoughts on this? Surely it's something I've missed right?
