{"id":2648,"date":"2023-11-14T21:05:16","date_gmt":"2023-11-14T20:05:16","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=2648"},"modified":"2023-11-14T21:05:16","modified_gmt":"2023-11-14T20:05:16","slug":"testing-breaker-controlled-transistorized-ignition-t-us","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/14\/testing-breaker-controlled-transistorized-ignition-t-us\/","title":{"rendered":"Testing breaker-controlled transistorized ignition (T) (us*"},"content":{"rendered":"

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07.5\u2014520 Testing breaker-controlled transistorized ignition (T) (us*<\/strong><\/div>\n<\/div>\n<\/td>\n
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1 <\/strong>voltmeter, measuring range 0\u20143 V, 0\u201415 V with 0.1 V scale graduation<\/div>\n<\/div>\n<\/td>\n
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1 ohmmeter, measuring range starting 0.1 <\/strong>ohm<\/div>\n<\/div>\n<\/td>\n
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1. Testing pre-resistors<\/strong><\/div>\n<\/div>\n<\/td>\n
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Loosen line connection on one connection of resistor about to be tested.<\/div>\n
Measure resistance with ohmmeter.<\/div>\n
Pre-resistor\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Resistor rated value at 20 \u00b0C<\/div>\n
0.4 ohm\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 0.4 \u00b1 0.05 ohm<\/div>\n
0.6 ohm\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a00.6 \u00b1 0.05 ohm<\/div>\n
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2. Testing ignition coil<\/strong><\/div>\n<\/div>\n<\/td>\n
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Insulation test<\/strong><\/div>\n
Separate ignition coil from vehicle circuits by removing terminals 1,15 and 4.<\/div>\n
Connect engine tester to ignition coil. Perform test according to operating instructions.<\/div>\n
Whenever possible, test ignition coil with a suitable engine tester (e.g. SUN 745 or 1130) under operating conditions. This will show above all insulation dama\u00adge, ground and winding shorts.<\/div>\n
Evaluate voltage flow on scope according to the following illustration.<\/div>\n<\/div>\n<\/td>\n
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Selection<\/em>\u00a0 \u00a0 \u00a0 \u00a0 <\/em>Line-up<\/div>\n
Fault<\/em>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <\/em>Voltage below 20 kv, less than 8 voltage peaks<\/div>\n
Cause\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <\/em>Interrupted winding, winding short or insulation damage against ground<\/div>\n
Remedy<\/em>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/em>Renew ignition coil<\/div>\n<\/div>\n<\/td>\n
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Evaluation<\/strong><\/div>\n
The ignition coil is perfect, if the first oscillation attains 20 kv, followed by min. 8 voltage peaks. If this value is not attained, replace ignition coil.<\/div>\n<\/div>\n<\/td>\n
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Resistance test<\/strong><\/div>\n<\/div>\n<\/td>\n
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Resistance rated value at 20 \u00b0C<\/div>\n<\/div>\n<\/td>\n
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Primary winding measured between terminal 1 and terminal 2<\/div>\n<\/div>\n<\/td>\n
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0.38-0.45 ohm<\/div>\n<\/div>\n<\/td>\n
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Secondary winding measured between terminal 1 and terminal 4<\/div>\n<\/div>\n<\/td>\n
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8-11 kohm<\/div>\n<\/div>\n<\/td>\n
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Measuring values are slightly higher when ignition coil is warm.<\/div>\n<\/div>\n<\/td>\n
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3. Testing breaker point<\/strong><\/div>\n<\/div>\n<\/td>\n
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For perfect functioning of transistorized systems the transfer resistance on breaker point should not be too high. To check, measure voltage drop at closed breaker point.<\/div>\n
Connect voltmeter: + to cable connector<\/div>\n
(= terminal 7 or TD on switchgear) \u2014 to ground<\/div>\n
Voltage readout max. 0.3 volt.<\/div>\n
If this value is exceeded, install a new breaker point.<\/div>\n<\/div>\n<\/td>\n
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4. Testing switchgears and line connections<\/strong><\/div>\n
Test for voltage on switchgear and whether the switching transistor permits passage of ignition coil primary current or locks at pertinent activation. The primary current will not be measured directly, but the voltage drop caused by this current for the sake of simplicity.<\/div>\n
The test is made with the engine stopped and the ignition switched on.<\/div>\n
Test voltage drop at input of 0.4 ohm resistor with breaker point closed.<\/strong><\/div>\n
Connect voltmeter: + to input pre-resistor 0.4 ohm<\/div>\n
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The voltage drop may amount to max. 0.4 volt.<\/div>\n
If voltage drop is too high, test cable and cable connections.<\/div>\n<\/div>\n<\/td>\n
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4.1 Standard switchgears (SI) Checking line connections<\/strong><\/div>\n
Pull 4-pole connecting plug from switchgear and test with voltmeter whether a battery voltage of 11.8-13 volts is available at terminal 15 and termi\u00adnal 16 on 4-point plug with the ignition switched on.<\/div>\n<\/div>\n<\/td>\n
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Connect voltmeter: + to terminaM5 or<\/div>\n
terminal 16 \u2014 to ground<\/div>\n
If no voltage is measured, check all connections from input 0.4 ohm resistor to switchgear.<\/div>\n
Then reattach 4-point round plug to switchgear.<\/div>\n<\/div>\n<\/td>\n
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Voltage with breaker point open<\/strong><\/div>\n
This will test tripping characteristics of transistor.<\/div>\n
Connect voltmeter: + to terminaM ignition coil<\/div>\n
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Battery voltage should be available at terminal 1, i.e. readout = 11.8-13 volts.<\/strong><\/div>\n
If not, replace switchgear.<\/div>\n<\/div>\n<\/td>\n
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Voltage with breaker contact closed<\/strong><\/div>\n
Voltmeter connected as before.<\/div>\n
Voltage at terminal 1 ignition coil = 0.7\u20141.5 volts.<\/div>\n
With breaker point closed, terminal 15 of ignition coil will show 3.6\u20144.6 volts, with open breaker point battery voltage.<\/div>\n
If not, replace switchgear.<\/div>\n<\/div>\n<\/td>\n
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Layout of transistorized system with switchgear in model 114.060\/073<\/div>\n
1\u00a0 \u00a0 Standard switchgear<\/div>\n
2\u00a0 \u00a0 Ignition coil<\/div>\n
3\u00a0 \u00a0Pre-resistor 0.4 ohm<\/div>\n
4\u00a0 \u00a0Pre-resistor 0.6 ohm<\/div>\n
5\u00a0 \u00a0Cable shoe for test connection (cable color green\/yellow)<\/div>\n<\/div>\n<\/td>\n
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Test values for switchgear test<\/strong><\/div>\n<\/div>\n<\/td>\n
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Vol Plus to<\/div>\n<\/div>\n<\/td>\n
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t meter Minus to<\/div>\n<\/div>\n<\/td>\n
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Breaker point<\/div>\n<\/div>\n<\/td>\n
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Rated voltage values SI standard transistorized system<\/div>\n<\/div>\n<\/td>\n
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Voltage values beyond rated range: causes, remedies<\/div>\n<\/div>\n<\/td>\n
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Pre-resistor 0.4 ohm input<\/div>\n<\/div>\n<\/td>\n
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ground<\/div>\n<\/div>\n<\/td>\n
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max. 0.4 V under battery voltage<\/div>\n<\/div>\n<\/td>\n
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With correct battery voltage: voltage drop battery \u2014 0.4 ohm pre-resistor too high caused by transfer resistances (corrosion), line interruption etc.<\/div>\n<\/div>\n<\/td>\n
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Pulled off switchgear plugs terminal 15 terminal 16<\/div>\n<\/div>\n<\/td>\n
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With correct voltage on 0.4 ohm pre-resistor: Parallel resistance or circuit interruption between 0.4 ohm pre-resistor input and terminal 15 or terminal 16<\/div>\n<\/div>\n<\/td>\n
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Cable con\u00adnector terminal 7 or TD<\/div>\n<\/div>\n<\/td>\n
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0-0.3 V<\/div>\n<\/div>\n<\/td>\n
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Voltage value higher: transfer resistance on breaker point too high. Replace breaker point<\/div>\n<\/div>\n<\/td>\n
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3.6-4.6 V<\/div>\n<\/div>\n<\/td>\n
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With correct voltage value on switch-gear and on terminal 7 or TD:<\/div>\n
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    07.5\u2014520 Testing breaker-controlled transistorized ignition (T) (us*   Conventional tools   1 voltmeter, measuring range 0\u20143 V, 0\u201415 V with 0.1 V scale graduation   1 ohmmeter, measuring range starting 0.1 ohm   1. Testing pre-resistors   Loosen line connection on one connection of resistor about to be tested. Measure resistance with ohmmeter. Pre-resistor\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Resistor rated value at 20 \u00b0C 0.4 ohm\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 0.4 \u00b1 0.05 ohm 0.6 ohm\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a00.6 \u00b1 0.05 ohm Values on warmer pre-resistors will be slightly higher.   2. Testing ignition coil   Insulation test Separate ignition coil from vehicle circuits by removing terminals 1,15 and 4. Connect engine tester to ignition coil. Perform test according to operating instructions. Whenever possible, test ignition coil with a suitable engine tester (e.g. SUN 745 or 1130) under operating conditions. This will show above all insulation dama\u00adge, ground and winding shorts. Evaluate voltage flow on scope according to the following illustration.   07.5.2 lb-520\/1           Selection\u00a0 \u00a0 \u00a0 \u00a0 Line-up Fault\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Voltage below 20 kv, less than 8 voltage peaks Cause\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Interrupted winding, winding short or insulation damage against ground Remedy\u00a0 \u00a0 \u00a0 \u00a0 \u00a0Renew ignition coil   Evaluation The ignition coil is perfect, if the first oscillation attains 20 kv, followed by min. 8 voltage peaks. If this value is not attained, replace ignition coil.   Resistance test   Resistance rated value at 20 \u00b0C   Primary winding measured between terminal 1 and terminal 2 0.38-0.45 ohm   Secondary winding measured between terminal 1 and terminal 4 8-11 kohm   Measuring values are slightly higher when ignition coil is warm.   07.5.2 lb-520\/2       3. Testing breaker point   For perfect functioning of transistorized systems the transfer resistance on breaker point should not be too high. To check, measure voltage drop at closed breaker point. Connect voltmeter: + to cable connector (= terminal 7 or TD on switchgear) \u2014 to ground Voltage readout max. 0.3 volt. If this value is exceeded, install a new breaker point.   4. Testing switchgears and line connections Test for voltage on switchgear and whether the switching transistor permits passage of ignition coil primary current or locks at pertinent activation. The primary current will not be measured directly, but the voltage drop caused by this current for the sake of simplicity. The test is made with the engine stopped and the ignition switched on. Test voltage drop at input of 0.4 ohm resistor with breaker point closed. Connect voltmeter: + to input pre-resistor 0.4 ohm \u2014 to ground The voltage drop may amount to max. 0.4 volt. If voltage drop is too high, test cable and cable connections.   4.1 Standard switchgears (SI) Checking line connections Pull 4-pole connecting plug from switchgear and test with voltmeter whether a battery voltage of 11.8-13 volts is available at terminal 15 and termi\u00adnal 16 on 4-point plug with the ignition switched on.   07.5.2 lb-520\/3       Connect voltmeter: + to terminaM5 or terminal 16 \u2014 to ground If no voltage is measured, check all connections from input 0.4 ohm resistor to switchgear. Then reattach 4-point round plug to switchgear.   Voltage with breaker point open This will test tripping characteristics of transistor. Connect voltmeter: + to terminaM ignition coil \u2014 to ground Battery voltage should be available at terminal 1, i.e. readout = 11.8-13 volts. If not, replace switchgear.   Voltage with breaker contact closed Voltmeter connected as before. Voltage at terminal 1 ignition coil = 0.7\u20141.5 volts. With breaker point closed, terminal 15 of ignition coil will show 3.6\u20144.6 volts, with open breaker point battery voltage. If not, replace switchgear.   Layout of transistorized system with switchgear in model 114.060\/073 1\u00a0 \u00a0 Standard switchgear 2\u00a0 \u00a0 Ignition coil 3\u00a0 \u00a0Pre-resistor 0.4 ohm 4\u00a0 \u00a0Pre-resistor 0.6 ohm 5\u00a0 \u00a0Cable shoe for test connection (cable color green\/yellow)   07.5.2 lb-520\/4       Test values for switchgear test   Measuring points of associated voltage values for transistorized systems   Vol Plus to t meter Minus to Breaker point Rated voltage values SI standard transistorized system Voltage values beyond rated range: causes, remedies Pre-resistor 0.4 ohm input ground closed max. 0.4 V under battery voltage With correct battery voltage: voltage drop battery \u2014 0.4 ohm pre-resistor too high caused by transfer resistances (corrosion), line interruption etc. Pulled off switchgear plugs terminal 15 terminal 16 without signifi\u00adcance battery voltage With correct voltage on 0.4 ohm pre-resistor: Parallel resistance or circuit interruption between 0.4 ohm pre-resistor input and terminal 15 or terminal 16 Cable con\u00adnector terminal 7 or TD closed 0-0.3 V Voltage value higher: transfer resistance on breaker point too high. Replace breaker point Ignition coil closed 3.6-4.6 V With correct voltage value on switch-gear and on terminal 7 or TD: Switchgear defective Replace switchgear terminal 15 open battery voltage Ignition coil terminal 1 closed 0.7-1.5 V open battery voltage   07.5.2 lb-520\/5      <\/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":[34,27],"tags":[],"class_list":["post-2648","post","type-post","status-publish","format-standard","hentry","category-ignition-system","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\/2648","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=2648"}],"version-history":[{"count":1,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2648\/revisions"}],"predecessor-version":[{"id":2649,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2648\/revisions\/2649"}],"wp:attachment":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/media?parent=2648"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/categories?post=2648"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/tags?post=2648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}