I've got a 1986 240 Dl that I have been diagnosing a crank no-start condition.
B230F, Bosch LH Jetronic 2.2
Replaced the coil after finding the one on there with 3.8ohm at terminals 1 & 15 and 36000 at 1 and center terminal.
Bentley calls for 1.1-1.3 @ 1 & 15 and 9600-11600 at 1 & center terminal.
The replacement is 1.4 & 9500, I thought that small variance could absolutely just be due to my fairly cheap multimeter.
This didn't work.
Coil lead is 2500ohm which seems to be in spec.
I back probed the connecter at the ignition control unit and had battery voltage at #2 as well as continuity at #10, which is in spec.
I get 12v at coil #15 with the ignition on.
Vacuum hose on Ignition control unit is new.
I have 12v at hall sensor "a" with ignition on.
This seems to me that the issue has to be in the ignition control unit.
Can someone confirm this for me?
Thank you!
1986 245 DL Ignition control unit question
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volvolugnut
- Posts: 6222
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Have you checked for spark from the coil wire to ground or using a timing light on the coil wire?
Do you have a manual with test information and schematic?
Hall sensors can fail.
volvolugnut
Do you have a manual with test information and schematic?
Hall sensors can fail.
volvolugnut
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
-
volvolugnut
- Posts: 6222
- Joined: 19 January 2014
- Year and Model: 2001 V70
- Location: Oklahoma USA
- Has thanked: 927 times
- Been thanked: 999 times
Have you checked for spark from the coil wire to ground or using a timing light on the coil wire?
Do you have a manual with test information and schematic?
Hall sensors can fail.
These ignition control units are very reliable.
volvolugnut
Do you have a manual with test information and schematic?
Hall sensors can fail.
These ignition control units are very reliable.
volvolugnut
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
-
LBC28704
- Posts: 5
- Joined: 20 November 2016
- Year and Model: 1995 850 GLT
- Location: Asheville, NC
- Has thanked: 2 times
Thanks for the reply.volvolugnut wrote: ↑19 Sep 2024, 17:16 Have you checked for spark from the coil wire to ground or using a timing light on the coil wire?
Do you have a manual with test information and schematic?
Hall sensors can fail.
volvolugnut
I have tested the hall sensor as per the procedures in the Bentley manual and it appears to be good.
Also, I did the test that involves intermittently jumping A & B on the hall sensor plug and this did not produce a spark.
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volvolugnut
- Posts: 6222
- Joined: 19 January 2014
- Year and Model: 2001 V70
- Location: Oklahoma USA
- Has thanked: 927 times
- Been thanked: 999 times
Bentley manual is very good tool. Follow their test procedure.
Volvolugnut
Volvolugnut
The Fleet:
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
Volvo: 2001 V70 T5, 1986 244DL, 1983 245DL, 1975 245DL, 1959 PV544, multiple Volvo parts cars.
Mercedes: 2001 E320, 1973 280, 1974 280C, 1989 300E, 1988 300TE, 1979 300TD, parts cars.
2009 Smart Passion
Ford: 1977 F350, 1964 F150 (2), 1938 Tudor Sedan
Farmall tractors: 1956 400 Diesel, 1946 A
And others.
-
LBC28704
- Posts: 5
- Joined: 20 November 2016
- Year and Model: 1995 850 GLT
- Location: Asheville, NC
- Has thanked: 2 times
From their procedures it seems the control unit is suspect.volvolugnut wrote: ↑20 Sep 2024, 06:34 Bentley manual is very good tool. Follow their test procedure.
Volvolugnut
I'm thinking about testing the hall sensor with a lab scope, just to be 100% sure.
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