SAFETY PRECAUTIONS
| WARNING | Observe the following for all installations, especially in the engine compartment due to lack of room: Route lines of all types (e.g. for fuel, hydraulic, EVAP canister system, coolant and refrigerant, brake fluid, vacuum) and electrical wiring so that the original path is followed. Watch for sufficient clearance to all moving or hot components. Fuel system is under pressure! Before opening system, place rags around the connection point. Then release pressure by carefully loosening connection. Test equipment must always be secured to the rear seat and operated by a second person. Test and measuring equipment that is operated from the passenger seat, the person seated could be injured in the event of an accident involving deployment of the passenger-side airbag. Do not touch or disconnect ignition wires when engine is running or turning at starting RPM. Only disconnect and reconnect wires for injection and ignition system, including test leads, if the ignition is turned off. |
| WARNING | The use of nails, paper clips, or another unauthorized materials to back-probe electrical harness connectors is strictly prohibited and may cause damage to the electrical harness connectors, terminal ends or damage to a component. Use only the manufacturers test lead kit or an equivalent aftermarket test lead kit for back-probing all electrical harness connectors. |
SPARK PLUGS, TEST DATA
| Engine code | BUB (3.2L / 5V/ 147 kW engine) | |
|---|---|---|
| Engine Control Module (ECM) System identification | Motronic ME 7.1.1 | |
| Engine idle speed | 600 to 700 RPM (not adjustable) | |
| Engine speed (RPM) limitation | Starting at approx. 6500 RPM | |
| Ignition sequence | 1-5-3-6-4-2 | |
| Ignition timing | Not adjustable, regulated by Electronic control module | |
| Ignition system | Single coil ignition system with 6 ignition coils (output stages integrated) that are connected directly to spark plugs by the ignition cables. | |
CAMSHAFT POSITION SENSOR, CHECKING
Camshaft Position (CMP) Sensor -G40-, Checking
Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Position (CMP) Sensor -G40-.
Special tools and workshop equipment required
- Multimeter.
- Wiring diagram.
Test requirements
- The Engine Control Module (ECM) - J623- fuses OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
Perform a preliminary check to verify the customers complaint. Refer to GENERAL DIAGNOSIS => .
Start diagnosis
Disconnect the Camshaft Position (CMP) Sensor -G40- electrical harness connector -1-.
Scheme 50
Switch the ignition on.
Using a Multimeter, Check the Camshaft Position (CMP) Sensor -G40- electrical harness connector terminals 1 to 3 for voltage.
Scheme 51
Specified value: about 5.0 V
Switch the ignition off.
If the specification was not obtained
Checking wiring
If the manufacturers test box is being used. Perform the following step.
Install the test box. Refer to Engine Control Module .
If the manufacturers test box is not being used. Perform the following step.
Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Using a Multimeter, Check the Camshaft Position (CMP) Sensor -G40- electrical harness connector to the Engine Control Module (ECM) electrical harness connector T40 for resistance.
Scheme 52
| Camshaft Position (CMP) Sensor -G40- electrical harness connector terminals | Engine Control Module (ECM) electrical harness connector T40 terminals or test box sockets |
|---|---|
| 1 | 98 |
| 2 | 86 |
| 3 | 108 |
Specified value: 1.5 ohms Max.
If the specified value was not obtained
Check the wiring connections for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and voltage supply was OK
Replace the Camshaft Position (CMP) Sensor -G40-.
If no malfunction is found in the wiring and voltage supply was not OK
Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
Perform a road test to verify repair.
If the DTC does not return
Repair complete, Generate readiness code. Refer to READINESS CODE => Readiness Code Description .
End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK
Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Assembly is performed in the reverse of the removal.
Final procedures
After repair work, the following work steps must be performed in the following sequence
- Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-03-read-dtc) .
- If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-04-erase-dtc) .
- If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster) .
End of diagnosis.
Camshaft Position (CMP) Sensor 2 -G163-, Checking
Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Position (CMP) Sensor 2 -G163-.
Special tools and workshop equipment required
- Multimeter.
- Wiring diagram.
Test requirements
- The Engine Control Module (ECM) - J623- fuses OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
Perform a preliminary check to verify the customers complaint. Refer to GENERAL DIAGNOSIS => .
Start diagnosis
Disconnect the Camshaft Position (CMP) Sensor 2 -G163- electrical harness connector -2-.
Switch the ignition on.
Using a Multimeter, Check the Camshaft Position (CMP) Sensor 2 -G163- electrical harness connector terminals 1 to 3 for voltage.
Specified value: about 5.0 V
Switch the ignition off.
If the specification was not obtained
Checking wiring
If the manufacturers test box is being used. Perform the following step.
Install the test box. Refer to Engine Control Module .
If the manufacturers test box is not being used. Perform the following step.
Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Using a Multimeter, Check the Camshaft Position (CMP) Sensor 2 -G163- electrical harness connector to the Engine Control Module (ECM) electrical harness connector T40 for resistance.
| Camshaft Position (CMP) Sensor 2 -G163- electrical harness connector terminals | Engine Control Module (ECM) electrical harness connector T40 terminals or test box sockets |
|---|---|
| 1 | 98 |
| 2 | 87 |
| 3 | 108 |
Specified value: 1.5 ohms Max.
If the specified value was not obtained
Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and voltage supply was OK
Replace the Camshaft Position (CMP) Sensor 2 -G163-.
If no malfunction is found in the wiring and voltage supply was not OK
Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
Perform a road test to verify repair.
If the DTC does not return
Repair complete, Generate readiness code. Refer to READINESS CODE => Readiness Code Description .
End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK
Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Assembly is performed in the reverse of the removal.
Final procedures
After repair work, the following work steps must be performed in the following sequence
- Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-03-read-dtc) .
- If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-04-erase-dtc) .
- If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster) .
End of diagnosis.
CAMSHAFT ADJUSTMENT VALVE, CHECKING
Camshaft Adjustment Valve 1 -N205-, Checking
Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Adjustment Valve 1 -N205-.
Special tools and workshop equipment required
- Multimeter.
- Wiring diagram.
Test requirements
- Fuse -SB7- OK.
- ]Motronic Engine Control Module (ECM) Power Supply Relay -J271- OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
Perform a preliminary check to verify the customers complaint. Refer to GENERAL DIAGNOSIS => .
Start diagnosis
Disconnect Camshaft Adjustment Valve 1 -N205- electrical harness connector -3-.
Using a Multimeter, check the Camshaft Adjustment Valve 1 -N205- electrical terminals 1 to 2 for resistance.
Scheme 53
Specified value: 5.0 to 8.0 ohms (at approx. 20° C)
If the specified value was not obtained
Replace the Camshaft Adjustment Valve 1 -N205-.
If the specified value was obtained
Checking voltage
Switch the ignition on.
Using a Multimeter, check the Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal 1 to Ground (GND) for voltage.
Switch the ignition off.
Specified value: battery voltage.
If the specified value was not obtained
Check the Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) Power Supply Relay -J271- socket 2/87 for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If the specified value was obtained
Checking wiring
If the manufacturers test box is being used. Perform the following step.
Install the test box. Refer to Engine Control Module
If the manufacturers test box is not being used. Perform the following step.
Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Using a Multimeter, Check the Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal 2 to the Engine Control Module (ECM) electrical harness connector T40 for resistance.
Scheme 54
| Camshaft Adjustment Valve 1 -N205- electrical harness connector terminal | Engine Control Module (ECM) electrical harness connector T40 terminal or test box socket |
|---|---|
| 2 | 115 |
Specified value: 1.5 ohms Max.
If the specified value was not obtained
Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and voltage supply was OK
Replace the Camshaft Adjustment Valve 1 -N205-.
Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
Perform a road test to verify repair.
If the DTC does not return
Repair complete, Generate readiness code. Refer to READINESS CODE => Readiness Code Description .
End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the Ground activation was not OK
Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Assembly is performed in the reverse of the removal.
Final procedures
After repair work, the following work steps must be performed in the following sequence
- Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-03-read-dtc) .
- If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-04-erase-dtc) .
- If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster) .
End of diagnosis.
Camshaft Adjustment Valve 1 (exhaust) -N318-, Checking
Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Camshaft Adjustment Valve 1 (exhaust) -N318-.
Special tools and workshop equipment required
- Multimeter.
- Wiring diagram.
Test requirements
- Fuse -SB7- OK.
- ]Motronic Engine Control Module (ECM) Power Supply Relay -J271- OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
Perform a preliminary check to verify the customers complaint. Refer to GENERAL DIAGNOSIS => .
Start diagnosis
Disconnect Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector -4-.
Using a Multimeter, check the Camshaft Adjustment Valve 1 (exhaust) -N318- electrical terminals 1 to 2 for resistance.
Specified value: 5.0 to 8.0 ohms (at approx. 20° C)
If the specified value was not obtained
Replace the Camshaft Adjustment Valve 1 (exhaust) -N318-.
If the specified value was obtained
Checking voltage
Switch the ignition on.
Using a Multimeter, check the Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector terminal 1 to Ground (GND) for voltage.
Switch the ignition off.
Specified value: battery voltage.
If the specified value was not obtained
Check the Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) Power Supply Relay -J271- socket 2/87 for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If the specified value was obtained
Checking wiring
If the manufacturers test box is being used. Perform the following step.
Install the test box. Refer to Engine Control Module .
If the manufacturers test box is not being used. Perform the following step.
Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Using a Multimeter, Check the Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector terminal 2 to the Engine Control Module (ECM) electrical harness connector T40 for resistance.
| Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector terminal | Engine Control Module (ECM) electrical harness connector T40 terminal or test box socket |
|---|---|
| 2 | 120 |
Specified value: 1.5 ohms Max.
If the specified value was not obtained
Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and voltage supply was OK
Replace the Camshaft Adjustment Valve 1 (exhaust) -N318-.
Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
Perform a road test to verify repair.
If the DTC does not return
Repair complete, Generate readiness code. Refer to READINESS CODE => Readiness Code Description .
End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the Ground activation was not OK
Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Assembly is performed in the reverse of the removal.
Final procedures
After repair work, the following work steps must be performed in the following sequence
- Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-03-read-dtc) .
- If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-04-erase-dtc) .
- If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster) .
End of diagnosis.
KNOCK SENSOR, CHECKING
Knock Sensor (KS) 1 -G61-, Checking
Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Knock Sensor (KS) 1 -G61-.
Special tools and workshop equipment required
- Multimeter.
- Wiring diagram.
Test requirements
- The mounting bolt of Knock Sensor (KS) 1 -G61- tightened to 20 Nm.
- The Engine Control Module (ECM) - J623- fuses OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
Perform a preliminary check to verify the customers complaint. Refer to GENERAL DIAGNOSIS => .
Start diagnosis
Disconnect the Knock Sensor (KS) 1 -G61- electrical harness connector -2-.
Scheme 55
Checking internal resistance
Using a Multimeter, check the Knock Sensor (KS) 1 -G61- terminals 1 to 2 for an internal short.
Scheme 56
Specified value: infinity (Infinity).
If the specified value was not obtained
Replace Knock Sensor (KS) 1 -G61-.
If the specified value was obtained
Checking wiring
If the manufacturers test box is being used. Perform the following step.
Install the test box. Refer to Engine Control Module .
If the manufacturers test box is not being used. Perform the following step.
Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Using a Multimeter, Check the Knock Sensor (KS) 1 -G61- electrical harness connector to the Engine Control Module (ECM)J623 electrical harness connector T40 for resistance.
Scheme 57
| Knock Sensor (KS) 1 -G61- electrical harness connector terminals | Engine Control Module (ECM) electrical harness connector T40 terminals or test box sockets |
|---|---|
| 1 | 106 |
| 2 | 99 |
| 3 | 108 |
Specified value: 1.5 ohms Max.
If the specified value was not obtained
Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and the resistance was not OK
Replace Knock Sensor (KS) 1 -G61-.
Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
Perform a road test to verify repair.
If the DTC does not return
Repair complete, Generate readiness code. Refer to READINESS CODE .
End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was not OK
Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Assembly is performed in the reverse of the removal.
Final procedures
After the repair work, the following work steps must be performed in the following sequence
- Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-03-read-dtc) .
- If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-04-erase-dtc) .
- If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster) .
End of diagnosis
Knock Sensor (KS) 2 -G66-, Checking
Note. Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the Knock Sensor (KS) 2 -G66-.
Special tools and workshop equipment required
- Multimeter.
- Wiring diagram.
Test requirements
- The mounting bolt of Knock Sensor (KS) 2 -G66- tightened to 20 Nm.
- The Engine Control Module (ECM) - J623- fuses OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
Perform a preliminary check to verify the customers complaint. Refer to GENERAL DIAGNOSIS => .
Start diagnosis
Disconnect the Knock Sensor (KS) 2 -G66- electrical harness connector -arrow-.
Scheme 58
Checking internal resistance
Using a Multimeter, check the Knock Sensor (KS) 2 -G66- terminals 1 to 2 for an internal short.
Specified value: infinity (Infinity).
If the specified value was not obtained
Replace the Knock Sensor (KS) 2 -G66-.
If the specified value was obtained
Checking wiring
If the manufacturers test box is being used. Perform the following step.
Install the test box. Refer to Engine Control Module .
If the manufacturers test box is not being used. Perform the following step.
Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Using a Multimeter, Check the Knock Sensor (KS) 2 -G66- electrical harness connector to the Engine Control Module (ECM) J623 electrical harness connector T40 for resistance.
| Knock Sensor (KS) 2 -G66- electrical harness connector terminals | Engine Control Module (ECM) electrical harness connector T40 terminals or test box sockets |
|---|---|
| 1 | 107 |
| 2 | 99 |
| 3 | 108 |
Specified value: 1.5 ohms Max.
If the specified value was not obtained
Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If no malfunction is found in the wiring and the resistance was not OK
Replace Knock Sensor (KS) 2 -G66-.
Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
Perform a road test to verify repair.
If the DTC does not return
Repair complete, Generate readiness code. Refer to READINESS CODE .
End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was not OK
Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Assembly is performed in the reverse of the removal.
Final procedures
After the repair work, the following work steps must be performed in the following sequence
- Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-03-read-dtc) .
- If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-04-erase-dtc) .
- If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster) .
End of diagnosis
IGNITION COILS WITH POWER OUTPUT STAGE, CHECKING
The following procedure is used to diagnose Ignition Coils with Power Output Stage -N70, N127, N291, N292, N323, N324-.
Special tools and workshop equipment required
- Multimeter.
- Diode test lamp.
- Wiring diagram.
Test requirements
- Fuse -SB8- OK.
- Fuse -SC11- OK.
- Motronic Engine Control Module (ECM) Power Supply Relay -J271- OK.
- Engine Speed (RPM) Sensor -G28- OK.
- Camshaft Position (CMP) Sensor -G40- OK.
- Battery voltage at least 12.5 volts.
- All electrical consumers such as, lights and rear window defroster, switched off.
- Vehicles with automatic transmission, shift selector lever into position "P" or "N".
- A/C switched off.
- Ground (GND) connections between engine/transmission/chassis OK.
- Ignition switched off.
Test procedure
Perform a preliminary check to verify the customers complaint. Refer to GENERAL DIAGNOSIS => .
Start diagnosis
Disconnect the Ignition Coils with Power Output Stage -- electrical harness connectors -1 through 6- from the Ignition Coils with Power Output Stage --.
Scheme 59
Checking voltage supply
Switch the ignition on.
Using a Multimeter, check the Ignition Coil -- electrical harness connector terminals 1 to 4 for voltage.
Scheme 60
Specified value: battery voltage.
Switch the ignition off.
If the specified value was not obtained
Check the Ignition Coil -- electrical harness connector terminal 1 to battery (+) connection 1 for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If the specified values were obtained
Checking activation
| WARNING | Do not touch the Ignition Coils -- connecting parts or adapter cables during the following test. |
Disable the power supply to the Fuel Injectors -- by removing Fuse -SB6-.
Using a diode test lamp, check the Ignition Coil -- electrical harness connector terminals 2 to 3 for voltage.
Operate the starter.
The LED should flicker.
Switch the ignition off.
If the LED flickers and the voltage was OK
Replace the faulty Ignition Coils with Power Output Stage --. Refer to Ignition System Engine Overview .
If the LED does not flicker
Checking wiring
If the manufacturers test box is being used. Perform the following step.
Install the test box. Refer to Engine Control Module
If the manufacturers test box is not being used. Perform the following step.
Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Using a Multimeter, Check the Ignition Coil -- electrical harness connector to the Engine Control Module (ECM) J623 electrical harness connector T40 for resistance.
| Ignition Coils with Power Output Stage -- electrical harness connector terminal | Engine Control Module (ECM) electrical harness connector T40 terminal or test box socket |
|---|---|
| N70/4 | 102 |
| N127/4 | 110 |
| N291/4 | 94 |
| N292/4 | 111 |
| N323/4 | 103 |
| N324/4 | 95 |
Specified value: 1.5 ohms Max.
If the specified value was not obtained
Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
Check the wiring connection for damage, corrosion, loose or broken terminals.
If necessary, repair the faulty wiring connection.
If the specified values were obtained
Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
Perform a road test to verify repair.
If the DTC does not return
Repair complete, Generate readiness code. Refer to READINESS CODE => Readiness Code Description .
End diagnosis.
If the DTC does return and no malfunction is detected in the wiring and the voltage supply was OK
Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE, REPLACING .
Assembly is performed in the reverse of the removal.
Final procedures
After repair work, the following work steps must be performed in the following sequence
- Check the DTC memory. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-03-read-dtc) .
- If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster__diagnostic-mode-04-erase-dtc) .
- If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(/audi/tt/8j-2006-2010/remont/cooling-fan/#32l-generic-scan-tool-engine-codes-cbra-roadster) .
End of diagnosis