{"id":2526,"date":"2023-11-13T22:38:28","date_gmt":"2023-11-13T21:38:28","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=2526"},"modified":"2023-11-13T22:38:28","modified_gmt":"2023-11-13T21:38:28","slug":"checking-choke-cover-stepped-heater","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/13\/checking-choke-cover-stepped-heater\/","title":{"rendered":"Checking choke cover-stepped heater"},"content":{"rendered":"

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07.2\u2014145 Checking choke cover-stepped heater<\/strong><\/div>\n<\/div>\n<\/td>\n
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A. \u00a91976<\/strong><\/div>\n<\/div>\n<\/td>\n
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Test conditions:<\/div>\n<\/div>\n<\/td>\n
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All fuses in order, engine at operating temperature, run engine at idle.<\/div>\n<\/div>\n<\/td>\n
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Wiring diagram <\/strong>(drawn with ignition switched off below 17 \u00b0C engine oil temperature)<\/div>\n<\/div>\n<\/td>\n
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Choke cover-stepped heater, automatic choke, positive and negative venting of float chamber<\/strong><\/div>\n<\/div>\n<\/td>\n
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5\u00a0 \u00a0 Relay box<\/div>\n
7\u00a0 \u00a0 Temperature switch 17 \u00b0C<\/div>\n
12\u00a0 \u00a0Switchover valve EGR (brown)<\/div>\n
32\u00a0 \u00a0Temperature switch 65 \u00b0C<\/div>\n<\/div>\n<\/td>\n
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33 Switchover valve air injection (blue) 37 Switchover valve float chamber<\/div>\n
positive ventilation (green) 46 Resistor 8 ohms<\/div>\n<\/div>\n<\/td>\n
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48 Choke cover<\/div>\n
59 Starter lockout and back-up lamp switch 241 Switchover valve automatic choke (white)<\/div>\n<\/div>\n<\/td>\n
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vi = purple ws= white<\/div>\n<\/div>\n<\/td>\n
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a Fuse no. 4<\/div>\n
b Coupler to main conductor<\/div>\n
Cable color purple \u2014 starter terminal 50 Cable color purple\/white \u2014 starter switch terminal 50<\/div>\n
c Warning switch catalyst temperature<\/div>\n<\/div>\n<\/td>\n
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07.2.2 la-145\/1<\/div>\n<\/div>\n<\/td>\n
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07.2.2 la-145\/2<\/div>\n<\/div>\n<\/td>\n
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B. \u00a91976<\/div>\n<\/div>\n<\/td>\n
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Test conditions:<\/div>\n<\/div>\n<\/td>\n
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All fuses in order, engine at operating temperature, run engine at idle.<\/div>\n<\/div>\n<\/td>\n
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Wiring diagram <\/strong>(drawn with ignition switched off, below 17 \u00b0C engine oil temperature)<\/div>\n<\/div>\n<\/td>\n
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Choke cover-stepped heater, EGR<\/strong><\/div>\n<\/div>\n<\/td>\n
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Color code<\/div>\n
bl = blue br = brown ge = yellow<\/div>\n<\/div>\n<\/td>\n
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a Fuse no. 3 (15\/54)<\/div>\n
b Relay starter terminal 85<\/div>\n
c Relay starter terminal 86<\/div>\n<\/div>\n<\/td>\n
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7\u00a0 \u00a0 Temperature switch 17 \u00b0C<\/div>\n
12\u00a0 \u00a0 Switchover valve EGR (brown)<\/div>\n
46\u00a0 \u00a0 Pre-resistor 8 ohms<\/div>\n
47\u00a0 \u00a0 Relay pre-resistor choke cover<\/div>\n
48\u00a0 \u00a0 Choke cover<\/div>\n
49\u00a0 \u00a0 Starter lockout and back-up light switch<\/div>\n<\/div>\n<\/td>\n
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Testing choke cover-stepped heater<\/strong><\/div>\n
Connect voltmeter to output of resistor (46) and to ground. Disconnect plug connection of electric line to temperature switch 17 \u00b0C (7) and connect to ground.<\/div>\n<\/div>\n<\/td>\n
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Voltmeter indicating 7-8 volts.<\/div>\n<\/div>\n<\/td>\n
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Voltmeter not indicating 7\u20148 volts.<\/div>\n<\/div>\n<\/td>\n
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W<\/em><\/div>\n<\/div>\n<\/td>\n
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Test relay pre-resistor choke cover (47)<\/strong><\/div>\n
Connect voltmeter one after the other to both connections of pre-resistor choke cover (46) and to ground.<\/div>\n<\/div>\n<\/td>\n
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07.2.2 la-145\/3<\/div>\n<\/div>\n<\/td>\n
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07.2.2 la-145\/4<\/div>\n<\/div>\n<\/td>\n
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C. \u00a91973\/74<\/div>\n<\/div>\n<\/td>\n
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Test conditions:<\/div>\n<\/div>\n<\/td>\n
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All fuses in order, engine at operating temperature, run engine at idle.<\/div>\n<\/div>\n<\/td>\n
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Wiring diagram <\/strong>(drawn with ignition switched off, below 17 \u00b0C engine oil temperature)<\/div>\n<\/div>\n<\/td>\n
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Choke cover-stepped heater, throttle valve lift<\/strong><\/div>\n<\/div>\n<\/td>\n
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07.2.2 la-145\/5<\/div>\n<\/div>\n<\/td>\n
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07.2.2 la-145\/6<\/div>\n<\/div>\n<\/td>\n
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D. @> 1974 California<\/strong><\/div>\n<\/div>\n<\/td>\n
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Test conditions:<\/div>\n<\/div>\n<\/td>\n
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All fuses in order, engine at operating temperature, run engine at idle.<\/div>\n<\/div>\n<\/td>\n
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Wiring <\/strong>diagram (drawn with ignition switched off, below 17 \u00b0C engine oil temperature)<\/div>\n<\/div>\n<\/td>\n
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Choke <\/strong>cover-stepped heater, fuel evaporation control <\/strong>system<\/div>\n<\/div>\n<\/td>\n
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3\u00a0 \u00a0 Temperature switch 62 \u00b0C<\/div>\n
7\u00a0 \u00a0 Temperature switch 17 \u00b0C<\/div>\n
8\u00a0 \u00a0 Temperature switch 100 \u00b0C<\/div>\n
9\u00a0 \u00a0 Switchover valve ignition<\/div>\n
12\u00a0 \u00a0 Switchover valve EGR<\/div>\n
13\u00a0 \u00a0 Vacuum switch<\/div>\n<\/div>\n<\/td>\n
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21 Switchbox<\/div>\n
25\u00a0 \u00a0 Relay disconnection temperature switch 62 \u00b0C\/100 \u00b0C<\/div>\n
26\u00a0 \u00a0 Relay auxiliary fan<\/div>\n
27\u00a0 \u00a0 Auxiliary fan<\/div>\n
32 Temperature switch 65 \u00b0C<\/div>\n<\/div>\n<\/td>\n
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33 Switchover valve air injection 37 Switchover valve fuel evaporation control system<\/div>\n
46\u00a0 \u00a0 Resistor choke cover<\/div>\n
47\u00a0 \u00a0 Relay resistor choke cover<\/div>\n
48\u00a0 \u00a0 Choke cover<\/div>\n<\/div>\n<\/td>\n
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Color code<\/div>\n<\/div>\n<\/td>\n
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bl = blue br = brown ge = yellow<\/div>\n<\/div>\n<\/td>\n
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gn = green rs = pink rt = red<\/div>\n<\/div>\n<\/td>\n
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sw = black vi = purple ws = white<\/div>\n<\/div>\n<\/td>\n
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a\u00a0 \u00a0To two-point cable connector terminal 7 (TD)<\/div>\n
b\u00a0 \u00a0Switch air conditioning system<\/div>\n
c\u00a0 \u00a0Fuse no. 3 (15\/54)<\/div>\n
d\u00a0 \u00a0Fuse no. 4 (15\/54)<\/div>\n
e\u00a0 \u00a0Auxiliary fuse box for auxiliary fan<\/div>\n
f\u00a0 \u00a0 4-point plug on relay holder<\/div>\n
g\u00a0 \u00a02-point coupler, tied-up<\/div>\n<\/div>\n<\/td>\n
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07.2.2 la-145\/7<\/div>\n<\/div>\n<\/td>\n
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07.2.2 la-145\/8<\/div>\n<\/div>\n<\/td>\n
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E. \u00a91975\/76<\/div>\n<\/div>\n<\/td>\n
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Test conditions:<\/div>\n<\/div>\n<\/td>\n
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All fuses in order, engine at operating temperature, run engine at idle.<\/div>\n<\/div>\n<\/td>\n
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Wiring diagram <\/strong>(drawn with ignition switched off, below 17 \u00b0C engine oil temperature)<\/div>\n<\/div>\n<\/td>\n
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Choke cover-stepped heater, automatic choke, tank breather<\/strong><\/div>\n<\/div>\n<\/td>\n
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    07.2\u2014145 Checking choke cover-stepped heater   A. \u00a91976   Test conditions: All fuses in order, engine at operating temperature, run engine at idle.   Wiring diagram (drawn with ignition switched off below 17 \u00b0C engine oil temperature)   Choke cover-stepped heater, automatic choke, positive and negative venting of float chamber     5\u00a0 \u00a0 Relay box 7\u00a0 \u00a0 Temperature switch 17 \u00b0C 12\u00a0 \u00a0Switchover valve EGR (brown) 32\u00a0 \u00a0Temperature switch 65 \u00b0C 33 Switchover valve air injection (blue) 37 Switchover valve float chamber positive ventilation (green) 46 Resistor 8 ohms 48 Choke cover 59 Starter lockout and back-up lamp switch 241 Switchover valve automatic choke (white)   Color code   bl = blue br = brown ge = yellow rs = pink rt = red sw= black vi = purple ws= white a Fuse no. 4 b Coupler to main conductor Cable color purple \u2014 starter terminal 50 Cable color purple\/white \u2014 starter switch terminal 50 c Warning switch catalyst temperature   07.2.2 la-145\/1         07.2.2 la-145\/2       B. \u00a91976   Test conditions: All fuses in order, engine at operating temperature, run engine at idle.   Wiring diagram (drawn with ignition switched off, below 17 \u00b0C engine oil temperature)   Choke cover-stepped heater, EGR   Color code bl = blue br = brown ge = yellow rs = pink rt = red sw= black vi = purple ws= white a Fuse no. 3 (15\/54) b Relay starter terminal 85 c Relay starter terminal 86 7\u00a0 \u00a0 Temperature switch 17 \u00b0C 12\u00a0 \u00a0 Switchover valve EGR (brown) 46\u00a0 \u00a0 Pre-resistor 8 ohms 47\u00a0 \u00a0 Relay pre-resistor choke cover 48\u00a0 \u00a0 Choke cover 49\u00a0 \u00a0 Starter lockout and back-up light switch   Testing choke cover-stepped heater Connect voltmeter to output of resistor (46) and to ground. Disconnect plug connection of electric line to temperature switch 17 \u00b0C (7) and connect to ground. Voltmeter indicating 7-8 volts. Voltmeter not indicating 7\u20148 volts.     W Test relay pre-resistor choke cover (47) Connect voltmeter one after the other to both connections of pre-resistor choke cover (46) and to ground.   07.2.2 la-145\/3         07.2.2 la-145\/4       C. \u00a91973\/74   Test conditions: All fuses in order, engine at operating temperature, run engine at idle.   Wiring diagram (drawn with ignition switched off, below 17 \u00b0C engine oil temperature)   Choke cover-stepped heater, throttle valve lift     07.2.2 la-145\/5         07.2.2 la-145\/6       D. @> 1974 California   Test conditions: All fuses in order, engine at operating temperature, run engine at idle.   Wiring diagram (drawn with ignition switched off, below 17 \u00b0C engine oil temperature)   Choke cover-stepped heater, fuel evaporation control system     3\u00a0 \u00a0 Temperature switch 62 \u00b0C 7\u00a0 \u00a0 Temperature switch 17 \u00b0C 8\u00a0 \u00a0 Temperature switch 100 \u00b0C 9\u00a0 \u00a0 Switchover valve ignition 12\u00a0 \u00a0 Switchover valve EGR 13\u00a0 \u00a0 Vacuum switch 21 Switchbox 25\u00a0 \u00a0 Relay disconnection temperature switch 62 \u00b0C\/100 \u00b0C 26\u00a0 \u00a0 Relay auxiliary fan 27\u00a0 \u00a0 Auxiliary fan 32 Temperature switch 65 \u00b0C 33 Switchover valve air injection 37 Switchover valve fuel evaporation control system 46\u00a0 \u00a0 Resistor choke cover 47\u00a0 \u00a0 Relay resistor choke cover 48\u00a0 \u00a0 Choke cover   Color code   bl = blue br = brown ge = yellow gn = green rs = pink rt = red sw = black vi = purple ws = white a\u00a0 \u00a0To two-point cable connector terminal 7 (TD) b\u00a0 \u00a0Switch air conditioning system c\u00a0 \u00a0Fuse no. 3 (15\/54) d\u00a0 \u00a0Fuse no. 4 (15\/54) e\u00a0 \u00a0Auxiliary fuse box for auxiliary fan f\u00a0 \u00a0 4-point plug on relay holder g\u00a0 \u00a02-point coupler, tied-up   07.2.2 la-145\/7         07.2.2 la-145\/8       E. \u00a91975\/76   Test conditions: All fuses in order, engine at operating temperature, run engine at idle.   Wiring diagram (drawn with ignition switched off, below 17 \u00b0C engine oil temperature)   Choke cover-stepped heater, automatic choke, tank breather     07.2.2 la-145\/9       50041   07.2.2 la-145\/10        <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[32,27],"tags":[],"class_list":["post-2526","post","type-post","status-publish","format-standard","hentry","category-carburetor-fuel-pump-throttle-linkage","category-m110"],"aioseo_notices":[],"featured_image_src":null,"author_info":{"display_name":"mackuz","author_link":"https:\/\/mbci.mackuz.ovh\/index.php\/author\/mackuz\/"},"_links":{"self":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/comments?post=2526"}],"version-history":[{"count":1,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2526\/revisions"}],"predecessor-version":[{"id":2527,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2526\/revisions\/2527"}],"wp:attachment":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/media?parent=2526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/categories?post=2526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/tags?post=2526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}