Ignition coil power output stage, checking

http://127.0.0.1:8080/audi/servlet/Display?action=Goto&type=repair&id=AUDI.B5. ... B7. 3. B6. 4. B5. - Replace ECM page 01-265 . - Replace ignition coil power ...Missing:
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Ignition coil power output stage, checking

Page 1 of 3

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Ignition coil power output stage, checking Component locations

page 28-1 .

Fuse for ignition coils OK Ignition coils OK; checking

page 28-16

Checking voltage supply - Disconnect 3-pin power output stage harness connector. - Switch Fluke 83 multimeter to voltage range and connect between Ground (GND) and terminals 1, 2 and 3 in sequence. - Switch ignition on. Specified value: approx. battery voltage If the specified value is not obtained: - Eliminate open circuit in wiring using wiring diagram.

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11/23/2002

Ignition coil power output stage, checking

Page 2 of 3

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Checking Ground (GND) - Disconnect 4-pin power output stage harness connector. - Switch Fluke 83 multimeter to voltage range, connect between connector terminal 2 (GND) and battery positive voltage (B+). Specified value: approx. battery voltage If the specified value is not obtained: - Eliminate open circuit using wiring diagram; repair as necessary. Checking triggering

- Disconnect 4-pin power output stage harness connector. - Disconnect all six fuel injector harness connectors. - Connect voltage tester between Ground (GND) and connector terminals 1, 3 and 4 in sequence. - Switch ignition on. - Operate starter for several seconds. Voltage tester must flash

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11/23/2002

Ignition coil power output stage, checking

Page 3 of 3

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If voltage tester does not flash: - Switch ignition off. - Switch Fluke 83 multimeter to resistance range and check wiring for continuity between power output stage harness connector and ECM harness connector. - Connect VAG 1598/19 test box to ECM harness connector 255 .

page 01-

- Locate open circuit using wiring diagram; repair as necessary. Power output stage terminal number

ECM connector B terminal number

1

B7

3

B6

4

B5

If wiring is OK: - Replace ECM

page 01-265 .

If voltage tester flashes, wiring is OK. If, during On Board Diagnostic, the diagnostic trouble codes P1393/17801, P1394/17802, or P1395/17803 ("Ignition Coil Power Output Stage 1/2/3 Electrical Malfunction") are displayed: - Replace ignition coil power output stage.

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11/23/2002