- Posts: 256
- Thank you received: 7
GPz1100 odd temp sensor voltage issue
- Polar_Bus
- Topic Author
- Offline
- User
Less
More
09 Jan 2011 06:43 - 09 Jan 2011 11:52 #420946
by Polar_Bus
Bikes:
'84 GPz1100
'06 HD Fatboy
GPz1100 odd temp sensor voltage issue was created by Polar_Bus
A buddy of mine was so impressed riding my GPz1100 back last spring, he bought
one himself ! His '83 GPz1100 is in great condition and all original. However the bike has been plagued with severall running issues. The first
was the infamous rust in the tank, got that fixed, the second was a bad pressure
regulator, got that fixed, now we have a odd issue. The ECU is sending a fault
code #13 (engine temp sensor) I swapped ECU's with a know good unit and no change. I'm observing and
odd situation where there is 1.8V at the gray wire with the ignition key "off".
In this condition there is not supposed to be any voltage present. That's as far
as I got, and i'll keep updating this thread as I hopefully get this issue
fixed. Any thoughts on this issue ? Thanks!
Rich
one himself ! His '83 GPz1100 is in great condition and all original. However the bike has been plagued with severall running issues. The first
was the infamous rust in the tank, got that fixed, the second was a bad pressure
regulator, got that fixed, now we have a odd issue. The ECU is sending a fault
code #13 (engine temp sensor) I swapped ECU's with a know good unit and no change. I'm observing and
odd situation where there is 1.8V at the gray wire with the ignition key "off".
In this condition there is not supposed to be any voltage present. That's as far
as I got, and i'll keep updating this thread as I hopefully get this issue
fixed. Any thoughts on this issue ? Thanks!
Rich
Bikes:
'84 GPz1100
'06 HD Fatboy
Last edit: 09 Jan 2011 11:52 by Polar_Bus.
Please Log in or Create an account to join the conversation.
- The Gringo
- Offline
- User
- ¡Usted no necesita otra motocicleta!
Less
More
- Posts: 1770
- Thank you received: 11
09 Jan 2011 09:47 #420990
by The Gringo
Andy
Akron, Ohio
80 Z-1 Classic-Sold
84 GPZ1100
79 KZ 1000 LTD
78 KZ 1000 A2
77 KZ 1000 LTD-Sold
76 KZ 900 The definition of a barn find
76 KZ 900-Sold gone to Denmark
KZ 750 times 3, KZ 650 times 8 Sold 1 down to 7
KZ 550 times 2 80 440LTD-Sold
81 CSR 305-Sold 81 Yamaha XS650 Special
Replied by The Gringo on topic GPz1100 odd temp sensor voltage issue
I don't know the answer to your problem but if it turns out that the sensor is bad I have a new one. As far as I know they are no longer available from Kawasaki.
Andy
Akron, Ohio
80 Z-1 Classic-Sold
84 GPZ1100
79 KZ 1000 LTD
78 KZ 1000 A2
77 KZ 1000 LTD-Sold
76 KZ 900 The definition of a barn find
76 KZ 900-Sold gone to Denmark
KZ 750 times 3, KZ 650 times 8 Sold 1 down to 7
KZ 550 times 2 80 440LTD-Sold
81 CSR 305-Sold 81 Yamaha XS650 Special
Please Log in or Create an account to join the conversation.
- TeK9iNe
- Offline
- User
- What did you do!?!
Less
More
- Posts: 2440
- Thank you received: 28
09 Jan 2011 10:09 #420994
by TeK9iNe
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
Replied by TeK9iNe on topic GPz1100 odd temp sensor voltage issue
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
Attachments:
Please Log in or Create an account to join the conversation.
- Polar_Bus
- Topic Author
- Offline
- User
Less
More
- Posts: 256
- Thank you received: 7
09 Jan 2011 11:50 #421011
by Polar_Bus
Bikes:
'84 GPz1100
'06 HD Fatboy
Replied by Polar_Bus on topic GPz1100 odd temp sensor voltage issue
I have a complete set of known good gpz1100 electronics, and I swapped ECU's and no change. Same fault code. I also swapped a spare temp sensor, and still nothing.
Bikes:
'84 GPz1100
'06 HD Fatboy
Please Log in or Create an account to join the conversation.
- MFolks
- Offline
- User
Less
More
- Posts: 6650
- Thank you received: 540
09 Jan 2011 12:03 #421016
by MFolks
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
Replied by MFolks on topic GPz1100 odd temp sensor voltage issue
If it were me, I'd be pulling the fuses one at a time to determine what circuit is powering the sensor. Sounds like a wiring problem crossing over from another circuit.
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
Please Log in or Create an account to join the conversation.
- Motor Head
- Offline
- User
- FIX UP YOUR BIKE RIGHT AND CHEAP
Less
More
- Posts: 5138
- Thank you received: 391
09 Jan 2011 13:00 #421040
by Motor Head
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Replied by Motor Head on topic GPz1100 odd temp sensor voltage issue
Maybe some of these from the FSM will help. Notice the Power/ Fuel pump relay has diodes. You should be able to check the system from the Computer/ ECM connector and pin everything out. Do you already have these tests in a FSM?
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Attachments:
Please Log in or Create an account to join the conversation.
- Motor Head
- Offline
- User
- FIX UP YOUR BIKE RIGHT AND CHEAP
Less
More
- Posts: 5138
- Thank you received: 391
09 Jan 2011 13:01 - 09 Jan 2011 13:03 #421041
by Motor Head
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Replied by Motor Head on topic GPz1100 odd temp sensor voltage issue
Also the Temp Sensor pin-out.
These are from a pdf service manual available for download on KZR, I've found it and posted the link a couple of times, search kz1000 pdf.
These are from a pdf service manual available for download on KZR, I've found it and posted the link a couple of times, search kz1000 pdf.
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Attachments:
Last edit: 09 Jan 2011 13:03 by Motor Head.
Please Log in or Create an account to join the conversation.
- Motor Head
- Offline
- User
- FIX UP YOUR BIKE RIGHT AND CHEAP
Less
More
- Posts: 5138
- Thank you received: 391
09 Jan 2011 13:26 #421047
by Motor Head
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Replied by Motor Head on topic GPz1100 odd temp sensor voltage issue
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Attachments:
Please Log in or Create an account to join the conversation.
- Motor Head
- Offline
- User
- FIX UP YOUR BIKE RIGHT AND CHEAP
Less
More
- Posts: 5138
- Thank you received: 391
09 Jan 2011 13:30 #421050
by Motor Head
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Replied by Motor Head on topic GPz1100 odd temp sensor voltage issue
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Attachments:
Please Log in or Create an account to join the conversation.
- Polar_Bus
- Topic Author
- Offline
- User
Less
More
- Posts: 256
- Thank you received: 7
09 Jan 2011 14:57 #421064
by Polar_Bus
Bikes:
'84 GPz1100
'06 HD Fatboy
Replied by Polar_Bus on topic GPz1100 odd temp sensor voltage issue
Thanks Motor Head for posting up the wiring diagrams, and yes I do have the KZ base manual and the GPz suppliment manual to help me figure this out. I played around a bit today, but dam it's cold and I can't work very long, but I swapped the CDI as another simple swap, and nope not the CDI. I also pulled all the plugs and they are sooty rich black. As I understand as soon as the ECU sends a fault code the DFI goes into "safe" mode which sounds like an rpm limiting very rich safety condition, so this is probably what's currently happening. Like Mfolks commented next step is to start yanking fuses to try and isolate the circut. I'm also going to inspect for a fried wire(s) or corrossion .
Rich
Rich
Bikes:
'84 GPz1100
'06 HD Fatboy
Please Log in or Create an account to join the conversation.
- Motor Head
- Offline
- User
- FIX UP YOUR BIKE RIGHT AND CHEAP
Less
More
- Posts: 5138
- Thank you received: 391
09 Jan 2011 15:02 #421066
by Motor Head
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Replied by Motor Head on topic GPz1100 odd temp sensor voltage issue
Follow the pin-outs from the ECU connector. Make sure that the grey wire has no other continuity except when hooked to the temp sensor. Check the sensor resistance as shown from the ECU connector. Make sure those voltage feeds to the ECU good dead at key off. Only external diodes I see are in the relay. But corrosion either in the harness or the ECU itself could back feed some voltage.
Good you have the FSM.
Good you have the FSM.
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Please Log in or Create an account to join the conversation.
- MFolks
- Offline
- User
Less
More
- Posts: 6650
- Thank you received: 540
09 Jan 2011 18:31 #421111
by MFolks
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
Replied by MFolks on topic GPz1100 odd temp sensor voltage issue
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
Please Log in or Create an account to join the conversation.