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If it is felt that the ignition mag/module may be faulty, perform the fol-
lowing tests before replacing the  ignition supply. Verify that the ignition
wiring and all connections relating to the ignition system are in good
condition. With solid state systems, also verify incoming signals and
D.C. power to the module are correct. (See D.C. Power)

Partial shorts in the wiring harness upstream or downstream of the test
point would result in lower than expected readings as the current intend-
ed for the ignition coil would now have an easier path to ground. (Zero
if fully shorted.)

Resistance in the wiring harness upstream of the test point would result
in lower than expected readings as current flow to the ignition coil is
restricted.(This reading would be zero if the circuit was fully open as
there is no path for current flow to the tester.)

Resistance in the wiring harness downstream of the test point would
result in very high readings as the current is trying to return to ground
through the high impedance of the ACCUTEK III.

Section 12

Missing Pulse

MULTI-STRIKE IGNITION SYSTEMS  MUST BE

OPERATED IN SINGLE STRIKE MODE WHEN

TESTING WITH THE ACCUTEK III.

The  ACCUTEK III has the ability to anticipate firing events on an
engine operating at a relatively constant R.P.M. This is very useful in
determining if an intermittent engine miss is being caused by a problem
with the ignition system. Should the ignition system fail to deliver a fir-
ing pulse to an ignition coil, at the anticipated interval, the engine will
misfire. The ACCUTEK III will alert you by illuminating the Missing
Pulse L.E.D.* and increment the count on the LCD. The ACCUTEK III
can be connected to the primary lead of the cylinder where the misfires
are occurring. This connection should be made as close to the ignition
coil as possible.

* The missing pulse LED is located to the right of the LCD display.

www.

.com

[email protected]

1.800.561.8187

Содержание Accutek III

Страница 1: ...www com information itm com 1 800 561 8187...

Страница 2: ...id crystal display simplifies operator use Compatible with Altronic Bosch Fairbanks Morse Holley and most other capacitive discharge ignition systems Rugged high impact case designed for field use Hig...

Страница 3: ...be reproduced or transmitted by any means or in any form without the prior written permission of Innovative Technical Solutions Inc CONTENTS Section 1 Introduction Section 2 Safety Using the ACCUTEK...

Страница 4: ...round systems Purge all fuel from the engine before performing any static engine tests As with any electrical device caution must be observed when using this product Multi strike ignition systems must...

Страница 5: ...s will result in unpredictable operation and possible failure of the equipment D C power stability MUST be established before any other tests are performed on an inoperative or erratic D C powered dev...

Страница 6: ...lator condition secondary tower spring etc Ignition coil manufacturers typically specify an operating temper ature of approx 200 deg F 93 deg C for ignition coils Therefore check ignition coil operati...

Страница 7: ...ith negative ground systems Always observe ignition coil polarity before connecting the ACCUTEK III to ignition coils 4 2 Firing Unshielded ignition coils Note A shock hazard exists if the following p...

Страница 8: ...25 Turn the ACCUTEK III on and depress PUSH TO TEST switch 4 26 Set voltage to be delivered to the ignition coil by adjusting the VOLT SET potentiometer DO NOT EXCEED IGNITION COIL MANUFACTURER S INP...

Страница 9: ...een purged from the engine Disconnect the wiring from the ignition source consider the engine as the conduc tive surface and follow the above instructions Refer to 4 21 to 4 28 4 3 Testing Shielded Ig...

Страница 10: ...are very consistent when testing iden tical ignition coils same manufacturer and model TRANSFER read ings are usually between 20 to 50 microseconds for standard duration coils and somewhat longer for...

Страница 11: ...d is generally safe as the spark path should return to ground through the shielded lead As always caution must be exercised when performing high voltage tests To test the integrity of the shielded sec...

Страница 12: ...ction 6 Wiring Harness CHECK FOR AC AND DC VOLTAGES ON THE DEVICE TO BE TESTED BEFORE CONTINUING A point to point check of the ignition harness should be performed using an ohmmeter to confirm continu...

Страница 13: ...This con duit must also be grounded at two separate locations and a ground wire should be attached from the ignition rail to a clean unpainted engine ground Measurements between the ignition coil nega...

Страница 14: ...e PUSH TO TEST switch is depressed Any time the PUSH TO TEST switch is pressed again the 2 minute timer is restarted Once the 2 minute timer expires OFF is displayed and the high voltage oscillator is...

Страница 15: ...ACCUTEK III will display a reading of less than 100 Section 8 TESTING INSTRUMENTS The ACCUTEK III provides a highly accurate crystal controlled 60 Hz approximately 100 to approximately 350 V D C sourc...

Страница 16: ...given input frequency Verify that the displayed R P M agrees with the manufactur er s specs at 60 Hz for your switch setting If the reading disagrees with the manufacturer s specs recheck the switch s...

Страница 17: ...etc 9 1 Place the TEST switch to the COIL IGN position and the MEASUREMENT switch to PEAK VOLTS 9 2 While observing polarity connect the leads from the HV TEST to the shutdown lead of the ignition sy...

Страница 18: ...e being delivered to that ignition coil If it is felt that the ignition mag module may be faulty perform the following checks before replacing the ignition supply Verify that the ignition wiring and a...

Страница 19: ...e has been included to provide additional safety to the operator Section 10 TRANSFER MULTI STRIKE IGNITION SYSTEMS MUST BE OPERATED IN SINGLE STRIKE MODE WHEN TESTING WITH THE ACCUTEK III The ACCUTEK...

Страница 20: ...d ignitions but somewhat more complex with shielded systems Innovative Technical Solutions has developed a new adaptor that will allow easy access 24T ALT When testing unshielded systems simply connec...

Страница 21: ...11 Energy The function of an ignition system by definition is to ignite the air fuel mixture in the combustion chamber at the desired time To accom plish this the ignition source mag or module must b...

Страница 22: ...associ ated with an engine cylinder engine running Each primary lead should be delivering the same energy potential to its intended ignition coil Should the energy level to any cylin der or cylinders...

Страница 23: ...wiring harness downstream of the test point would result in very high readings as the current is trying to return to ground through the high impedance of the ACCUTEK III Section 12 Missing Pulse MULTI...

Страница 24: ...be monitored This could be either the primary harness junction box or with unshielded igni tion coils this could also be performed at the primary positive connection on the ignition coil 12 3 With th...

Страница 25: ...UTEK III Replace the exhausted batteries with fresh alkaline AA cells taking care to insert the new cells in the correct orientation Calibration and Adjustments All of the functions of the ACCUTEK III...

Страница 26: ...hnical Solutions Inc together with the following 1 Copy of sales receipt 2 Date of failure 3 Type of failure 4 Test being performed at time of failure 5 Name address and phone number of contact person...

Страница 27: ...6 0 11 0 791 030 0 2 0 3 6 0 7 5 791 020 0 2 0 3 6 0 7 5 591 040 0 2 0 3 6 0 11 0 FAIRBANKS MORSE PPT2477P 0 3 0 6 11 0 13 0 PPT2477L 1 0 2 0 12 0 15 0 PPT2477AA6 0 2 0 3 1 65 2 0 PPT2477AA8 0 2 0 3 1...

Страница 28: ...ut Impedance 835 K Ohms Input Voltage 40 to 400 VDC Rising Edge Pulse Triggered Polarity Reversal Protection Open Circuit Oscillator Lockout Missing Pulse Function Rising Edge Pulse Threshold 40 VDC M...

Страница 29: ...ded coils 24BP BS Used for testing Bosch 2 pin shielded coils 24BP CAT Used for testing Caterpillar EIS coils 24T ALT Used as a means of obtaining access to the primary wiring on shielded ignitions us...

Страница 30: ...INNOVATIVE TECHNICAL SOLUTIONS INC 7127 18 St S E Calgary Alberta T2C 1K2 Ph 403 236 4116 Fax 403 279 1812 www intechnical com www com information itm com 1 800 561 8187...

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