Generac Power Systems 940-2, 941-2 TEST 18- CHECK IGNITION SENSOR, TEST 19- CHECK IGNITION COIL

Section 7.2

ENGINE DC CONTROL SYSTEM / AC TROUBLESHOOTING

Figure 8. Checking Spark Plug Gap

RESULTS:

1.Clean and regap or replace spark plug as necessary.

2.If spark plug is good but engine will not start, go to Test 3.

3.If spark plug is good but engine misses or runs rough,. go to Test 23.

TEST 17- CHECK IGNITION POWER SUPPLY

DISCUSSION:

During startup, the A6060 circuit board delivers DC power to the Ignition Module via Wire 14. If the engine cranks but won't start, one possible cause is loss of this power supply.

The DC power from the A6060 Circuit Board is deliv- ered to a 4-tab terminal connector. From that connec- tor, it is routed to the Ignition Module.

These components are all housed in the control panel.

Figure 9. Ignition Module & 4-Tab Connector

TEST PROCEDURE:

In the control panel, inspect the Wire 14 connections at the 4-tab connector. Check Wire 14. Check the power supply as follows:

1. Set a VOM to read battery voltage.

2.Connect the VOM test leads across the 4-tab connector and frame ground.

3.Hold the engine Start-Stop switch at "START".

The meter should read battery voltage.

RESULTS:

1.If DC voltage is NOT indicated, go to Test 21.

2.If DC voltage is good, go on to Test 18.

TEST 18- CHECK IGNITION SENSOR

DISCUSSION:

Refer to Section 6.4, "ENGINE IGNITION SYSTEM".

TEST PROCEDURE:

See Section 6.4.

RESULTS:

1.Replace Sensor, if bad.

2.If Sensor checks good, go to Test 19.

TEST 19- CHECK IGNITION COIL

DISCUSSION:

See Section 6.4, "ENGINE IGNITION SYSTEM".

TEST PROCEDURE:

See Section 6.4.

RESULTS:

1.Replace Ignition Coil if bad.

2.If coil is good, go to Test 20.

TEST 20- TEST IGNITION MODULE

DISCUSSION:

See Section 6.4, "ENGINE IGNITION SYSTEM".

TEST PROCEDURE:

Refer to Section 6.4.

RESULTS:

Replace Ignition Module if bad.

TEST 21 - CHECK A6060 CIRCUIT BOARD

OUTPUT TO WIRE 14

DISCUSSION:

If the engine cranks when the Start-Stop switch is set to "START", battery voltage must be available to the A6060 circuit board.

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