Volkswagen New Beetle. Manual - part 1795

 

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Volkswagen New Beetle. Manual - part 1795

 

 

Measure resistance between 10 pin harness connector terminals and test box sockets. See INJECTION 
PUMP QUALITY ADJUSTER (N146) / TEST BOX SOCKET 
table and Fig. 20 . 

INJECTION PUMP QUALITY ADJUSTER (N146) / TEST BOX SOCKET 

5. Resistance should be less than 1.5 ohms for each reading. If resistance is as specified, go to next step. If 

any resistance is not as specified, repair open in wiring between 10 pin Injection Pump Quality Adjuster 
(N146) harness connector and ECM. After repairs, erase DTC memory. See CLEARING 
DIAGNOSTIC TROUBLE CODES (FUNCTION 05) 
under SELF DIAGNOSTIC SYSTEM. Verify 
repair. Test is complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN 
PROCEDURE 
.  

6. Check terminals No. 5 and 6 for short to each other. Check terminals No. 5 and 6 for short to B+. Check 

terminals No. 5 and 6 for short to ground. If wiring is okay, go to next step. If wiring is not okay, repair 
short circuit(s) as necessary. After repairs, erase DTC memory. See CLEARING DIAGNOSTIC 
TROUBLE CODES (FUNCTION 05) 
under SELF DIAGNOSTIC SYSTEM. Verify repair. Test is 
complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE .  

7. If resistances are as specified and all wiring is okay, replace faulty ECM. After repairs, erase DTC 

memory. See CLEARING DIAGNOSTIC TROUBLE CODES (FUNCTION 05) under SELF 
DIAGNOSTIC SYSTEM. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST 
DRIVE RELEARN PROCEDURE 
.  

DTC P1569/17977 & VAG DTC 00671 

Code Definition 

DTC P1569/17977 
Cruise Control Switch (E45) - Implausible Signal 

VAG DTC 00671 
Cruise Control Switch (E45) - Undefined Switch Position (DTC 00671 is displayed in VW factory scan 
tool format only.)  

NOTE:

Test box socket numbers correspond to ECM pin numbers. 

Injection Pump Quality Adjuster (N146) 

VAG Test Box Socket 

116 

121 

NOTE:

For connector terminal wire colors, see appropriate WIRING DIAGRAM under 
ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. For component 
locations, see COMPONENT LOCATIONS . 

NOTE:

Before replacing any component, ensure all connectors at component and ECM 

 

2003 Volkswagen New Beetle GLS 

2002-2004 ENGINE PERFORMANCE Self-Diagnostics - 1.9L Turbo Diesel - Beetle, Golf & Jetta (Engine Code ALH)

  

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Possible Effects 

Possible effects are no cruise control.  

Test Procedures 

1. Ensure battery is okay. Ensure all fuses are okay, battery voltage is at least 11.5 volts and fuel pump relay 

is okay. Ensure all electrical accessories are off and A/C is off.  

2. Check cruise control system. Turn ignition on, engine off. Connect scan tool, see Fig. 1 . Press keys "0" 

and "1" for address word "Engine Electronics". If "00SG" is present in top line of scan tool display, cruise 
control is not activated. Activate cruise control, see, ACTIVATING/DEACTIVATING CRUISE 
CONTROL 
.  

3. If "G00SG" is present in top line of scan tool display, continue with testing. Press "right arrow" key, press 

keys "0" and "8" for "Read measured value block" and enter by pressing "Q" key. Press keys "0", "0" and 
"6" for display group "6" and enter by pressing "Q" key. "Display field 4" should read 0. If "Display field 
4" reads 255, go to next step. If "Display field 4" reads 0, erase DTC memory. See CLEARING 
DIAGNOSTIC TROUBLE CODES (FUNCTION 05) 
under SELF DIAGNOSTIC SYSTEM. Perform 
ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE . Test is complete if no DTCs 
reset.  

4.  

Check CCS (E45). Start engine and let engine idle. Vehicles with (A/T) should be test driven to a 
minimum of 25 MPH (40 KM/H) in 2nd gear or higher. It is not necessary to test drive vehicles with 
manual transmissions (M/T).  

5.  

Set parking brake. Turn ignition key into on position, (engine off). For A/T, select 2nd gear or higher. For 
M/T, select neutral. Check CCS (E45) test positions, moving down test requirement table. See Fig. 39 . If 
any reading in display field 3 is not okay, go to next step. If all readings are okay, erase DTC memory. 
See CLEARING DIAGNOSTIC TROUBLE CODES (FUNCTION 05) under SELF DIAGNOSTIC 
SYSTEM. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE . Test is 
complete if no DTCs reset. 

are clean and tight. After making any repairs, disconnect ECM harness 
connector for 10 seconds, connect ECM harness connector and retest system. 
It is necessary to generate an ECM readiness code if ECM memory is cleared, 
battery voltage is disconnected or ECM is disconnected. 

NOTE:

In vehicles with automatic transmissions (A/T). ECM (J248) does not 
supply voltage to Cruise Control Switch (CCS) (E45) until 20 MPH (32 
KM/H) is exceeded. 

NOTE:

All following readings in this step are in display field 3. See Fig. 39 . 

 

2003 Volkswagen New Beetle GLS 

2002-2004 ENGINE PERFORMANCE Self-Diagnostics - 1.9L Turbo Diesel - Beetle, Golf & Jetta (Engine Code ALH)

  

Helpmelearn Repair Manuals 

 

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Fig. 39: Identifying Cruise Control Switch Test Positions & Test Requirements Table 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

6. Turn ignition off. Disconnect Engine Control Module (ECM) harness connector. Connect VAG 1598/31 

test box to ECM harness connector (leave ECM disconnected). See CONNECTING VAG TEST BOX 

7.  

Check wring for open circuits between CCS (E45) terminals and ECM (J248). See appropriate WIRING 
DIAGRAM under CRUISE CONTROL in SYSTEM WIRING DIAGRAMS. Resistance should be less 

NOTE:

Test box socket numbers correspond to ECM pin numbers. 

 

2003 Volkswagen New Beetle GLS 

2002-2004 ENGINE PERFORMANCE Self-Diagnostics - 1.9L Turbo Diesel - Beetle, Golf & Jetta (Engine Code ALH)

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:48:24 AM

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than 1.5 ohms for each reading. If resistance is as specified, go to next step. If resistance is not as 
specified, repair open and/or short circuit in wiring between CCS (E45) and ECM. After repairs, erase 
DTC memory. See CLEARING DIAGNOSTIC TROUBLE CODES (FUNCTION 05) under SELF 
DIAGNOSTIC SYSTEM. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST 
DRIVE RELEARN PROCEDURE 
.  

8. Check wring for short circuit between CCS (E45) terminals and ECM (J248). See appropriate WIRING 

DIAGRAM under CRUISE CONTROL in SYSTEM WIRING DIAGRAMS. If circuits are not okay, go 
to next step. If circuits are okay, erase DTC memory. See CLEARING DIAGNOSTIC TROUBLE 
CODES (FUNCTION 05) 
under SELF DIAGNOSTIC SYSTEM. Perform ECM relearn procedure. See 
TEST DRIVE RELEARN PROCEDURE . Test is complete if no DTCs reset.  

9. Repair short circuit(s) in wiring between CCS (E45) and ECM. After repairs, erase DTC memory. See 

CLEARING DIAGNOSTIC TROUBLE CODES (FUNCTION 05) under SELF DIAGNOSTIC 
SYSTEM. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST DRIVE 
RELEARN PROCEDURE 
.  

DTC P1570/17978: ECM (J248) - BLOCKED 

DTC P1600/18008, DTC P1601/18009 & VAG DTC 00668 

Code Definition 

DTC P1600/18008 
ECM Voltage Supply Terminal 15 - Voltage To Low 

DTC P1601/18009 
Power Supply Relay Terminal 30 (B +) - Relay Sticking (Intermittent) 

VAG DTC 00668 
 

Voltage Terminal 30 - Implausible Signal  

CAUTION: When replacing ECM (J248). It is necessary to adapt ECM to immobilizer. 

No information is available for VW. 

CAUTION: Manufacturers states that scan tools VAS 5051 and VAS 5052 MUST be 

programmed with correct Importer/Dealer number as well as correct time 
when adapt ECM to immobilizer from model year 2002 on (Generation III 
immobilizer). 

NOTE:

Manufacturer recommends use of Scan Tool VAG 1551/1552 or VAS 5051/5052. 
Follow scan tool manufacturer instructions for adapting ECM to immobilizer. 

NOTE:

DTC 00668 is displayed in VW factory scan tool format only. 

 

2003 Volkswagen New Beetle GLS 

2002-2004 ENGINE PERFORMANCE Self-Diagnostics - 1.9L Turbo Diesel - Beetle, Golf & Jetta (Engine Code ALH)

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:48:24 AM

Page 95 

© 2004 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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