Volkswagen New Beetle. Manual - part 1903

 

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Volkswagen New Beetle. Manual - part 1903

 

 

DTC P1425/17833 & DTC P1426/17834 

Code Definition 

z

DTC P1425/17833: EVAP Canister Purge Valve (N80) - Short To Ground  

z

DTC P1426/17834: EVAP Canister Purge Valve (N80) - Open Circuit  

Test Requirements 

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. Ensure engine is mechanically sound. Ensure no intake or exhaust system 
leaks exist. Ensure engine coolant temperature is at least 176°F (80°C).  

Test Procedure 

1. Connect scan tool. See RETRIEVING DIAGNOSTIC TROUBLE CODES . Turn ignition on. Using 

scan tool, check EVAP Canister Purge Valve (N80). See OUTPUT DIAGNOSTIC TEST MODE 
EVAP Canister Purge Valve (N80) should audibly click. EVAP Canister Purge Valve (N80) for Beetle, 
GTI and Jetta are located in engine compartment, center of right side fender On Passat, EVAP Canister 
Purge Valve (N80) is located by bottom of air cleaner. See Fig. 56 and Fig. 57 .If EVAP Canister Purge 
Valve (N80) clicks, erase DTC memory. Perform ECM relearn procedure. See TEST DRIVE 
RELEARN PROCEDURE 
. If DTC does not reset on test drive. Test is complete. If EVAP Canister 
Purge Valve (N80) does not click or DTC P0440/16824 or P0441/16825 resets, go to next step.  

2. Turn ignition off. Disconnect harness connector from EVAP Canister Purge Valve (N80). Connect LED 

test light to EVAP canister purge valve harness connector. Turn ignition on. Using scan tool, check 
EVAP Canister Purge Valve (N80). See OUTPUT DIAGNOSTIC TEST MODE . LED test light 
should flash. If test light does not flash, go to next step. If test light flashes, replace faulty EVAP Canister 
Purge Valve (N80). Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn 
procedure. See TEST DRIVE RELEARN PROCEDURE .  

3. Turn ignition off. Using DVOM check resistance of EVAP Canister Purge Valve (N80) harness 

connector wiring. See appropriate WIRING DIAGRAM under ENGINE PERFORMANCE in SYSTEM 
WIRING DIAGRAMS. Resistance should be a maximum of 1.5 ohms for each reading. Check wiring in 
harness connector for short circuits to one another and to ground and B+. If resistance is okay and no shot 
circuits are present, replace faulty ECM. See ENGINE CONTROL MODULE REMOVAL & 
INSTALLATION 
. Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn 

NOTE:

If a test ends with ECM replacement. Before replacing ECM be certain that, all 
wiring, power and ground supplies are okay. See ENGINE PERFORMANCE in 
SYSTEM WIRING DIAGRAMS article in ELECTRICAL and ECM GROUND & 
VOLTAGE SUPPLY . 

NOTE:

Output Diagnostic Test Mode is used when using Scan Tools VAG 1551/1552 or 
VAS 5051/5052, always continue with output diagnostic test mode until last 
component in output diagnostic test mode test sequence has been checked. If 
you are not using Scan Tools VAG 1551/1552 or VAS 5051/5052 follow scan tool 
manufacturer's instructions. 

 

2003 Volkswagen New Beetle GLS 

2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:44:51 AM

Page 234 

© 2004 Mitchell Repair Information Company, LLC. 

procedure. See TEST DRIVE RELEARN PROCEDURE . If resistance is not okay, repair as 
necessary. Erase DTC memory. Test is complete. Perform ECM relearn procedure. See TEST DRIVE 
RELEARN PROCEDURE 
.  

DTC P1427/17835, DTC P1428/17836, DTC P1429/17837, DTC P1430/17838 & DTC P1431/17839 
(PASSAT) 

Code Definition 

z

DTC P1427/17835: Brake Vacuum Pump (V192) Activation - Short To B+  

z

DTC P1428/17836: Brake Vacuum Pump (V192) Activation - Short To Ground  

z

DTC P1429/17837: Brake Vacuum Pump (V192) Activation - Open Circuit  

z

DTC P1430/17838: Brake Vacuum Pump (V192) Activation - Open/Short To B+  

z

DTC P1431/17839: Brake Vacuum Pump (V192) Activation - Open/Short To Ground  

Test Requirements 

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.  

Test Procedure 

1.  

Turn engine off. Lift vehicle, with help from a second person, check Brake Vacuum Pump (V192) 
operation by touch. On all models except Passat, Brake Vacuum Pump (V192) is located at front lower 
left subframe. See Fig. 69 . For Passat see, Fig. 70 . Start engine. Brake Vacuum Pump (V192) must run 
briefly. If brake vacuum pump does not run, go to next step. If brake vacuum pump runs briefly, brake 
vacuum pump is okay. Visually check brake vacuum pump harness connector and wiring for damage 
(possibly intermittent), erase DTC memory. Perform ECM relearn procedure. See TEST DRIVE 
RELEARN PROCEDURE 
. If DTC for Brake Vacuum Pump (V192) does not reset, test is complete.  

2. Check Brake Vacuum Pump (V192) wiring for open or short circuits. See appropriate WIRING 

DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. Repair as necessary. 
After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See 
TEST DRIVE RELEARN PROCEDURE 

NOTE:

When stating engine, Brake Vacuum Pump (V192) must run briefly. Brake 
Vacuum Pump (V192) is used on models with A/T only. 

WARNING:

Always use jack stands or hoist safeties when working on a raised 
vehicle. 

 

2003 Volkswagen New Beetle GLS 

2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:44:51 AM

Page 235 

© 2004 Mitchell Repair Information Company, LLC. 

Fig. 69: Locating Brake Vacuum Pump (V192) - Beetle, GTI & Jetta 
Courtesy of VOLKSWAGEN UNITED STATES, INC.

 

2003 Volkswagen New Beetle GLS 

2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:44:51 AM

Page 236 

© 2004 Mitchell Repair Information Company, LLC. 

Fig. 70: Locating Brake Vacuum Pump (V192) - Passat 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

DTC P1432/17840: SECONDARY AIR INJECTION VALVE (N112) - OPEN CIRCUIT 

Test Requirements 

Ensure all fuses are okay, battery voltage is at least 11.5 volts, all electrical accessories are off, A/C is off. 
Ensure engine is mechanically sound.  

Test Procedure 

1.  

NOTE:

Output Diagnostic Test Mode is used when using Scan Tools VAG 1551/1552 or 
VAS 5051/5052, always continue with output diagnostic test mode until last 
component in output diagnostic test mode test sequence has been checked. If 
you are not using Scan Tools VAG 1551/1552 or VAS 5051/5052 follow scan tool 
manufacturer's instructions. 

NOTE:

Secondary air system is activated by ECM and blows air into exhaust pipe 
upstream of catalytic converter for 100 seconds during a cold start, 41-91°
F (5-33°C). Engine must be cold to perform following test procedure. 

 

2003 Volkswagen New Beetle GLS 

2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:44:51 AM

Page 237 

© 2004 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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