Volkswagen New Beetle. Manual - part 1826

 

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Volkswagen New Beetle. Manual - part 1826

 

 

Fig. 38: Locating Vehicle Speed Sensor (G22), On Top Of Differential Housing (A/T) 
Courtesy of VOLKSWAGEN UNITED STATES, INC.

 

2003 Volkswagen New Beetle GLS 

2001-2003 ENGINE PERFORMANCE Self-Diagnostics - 2.0L - Beetle, Golf & Jetta (Engine Codes AVH & AZG)

  

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Fig. 39: Locating Vehicle Speed Sensor (G22), On Top Of Differential Housing (M/T) 
Courtesy of VOLKSWAGEN UNITED STATES, INC. 

DTC P0506/16890 & P0507/16891: IDLE SPEED CONTROL 

Code Definition 

DTC P0506/16890 
Idle Speed Control - RPM Too Low 

DTC P050716891 
Idle Speed Control - RPM Too High  

Circuit/Component Description 

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 . 

 

2003 Volkswagen New Beetle GLS 

2001-2003 ENGINE PERFORMANCE Self-Diagnostics - 2.0L - Beetle, Golf & Jetta (Engine Codes AVH & AZG)

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:49:57 AM

Page 105 

© 2004 Mitchell Repair Information Company, LLC. 

Throttle Valve Control Module (TVCM - J338) is located on throttle body. Throttle valve drive angle sensors 
and are located in TVCM (J338). ECM monitors throttle valve drive angle sensors for throttle valve position. 
ECM calculates throttle position based on percentage values sent by throttle valve drive angle sensors. Throttle 
valve drive angle sensors run in opposite directions of each other. Throttle Valve Drive Angle sensor No. 1 
(G187) displays throttle positions from 3-97 percent.  

Throttle Valve Drive Angle sensor No. 2 (G188) displays throttle positions from 97-3 percent. Throttle Valve 
Drive Angle sensor No. 1 (G187) ranges from 3-93 percent (0.15-4.65 volts), the larger the throttle opening the 
higher the percentage (voltage) reading. Throttle Valve Drive Angle sensor No. 2 (G188) ranges from 97-3 
percent (4.90-0.15 volts), the larger the throttle opening the smaller the percentage (voltage) reading. When the 
engine is running (under load) the ECM can operate throttle valve independently of driver input.  

Test Requirements 

Ensure throttle valve is not damaged or dirty. 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). On vehicles with M/T, gear shifter must be in neutral with parking brake set. On vehicles with A/T, selector 
lever must be in park or neutral with parking brake set.  

Test Procedure 

1. Turn ignition off. Disconnect TVCM (J338) 6-pin harness connector. Using DVOM check resistance 

between terminals No. 3 and 5 on TVCM. See Fig. 19 . Specification is 1-5 ohms.  

2. If resistance is okay, go to next step. If resistance is not okay, replace faulty TVCM. Erase DTC memory. 

Verify repair. Test is complete. Adapt TVCM (J338) to ECM (J220). See THROTTLE VALVE 
CONTROL MODULE (J338) 
. For vehicles with A/T, adapt TVCM (J338) to Transmission Control 
Module (J217). See A/T BASIC SETTING . On all models, perform ECM relearn procedure. See TEST 
DRIVE RELEARN PROCEDURE 
.  

3.  

Connect scan tool. See RETRIEVING DIAGNOSTIC TROUBLE CODES . Turn ignition on, engine 
off. Following scan tool manufacturer's instructions, observe percentage reading for Throttle Valve Drive 
Angle sensor No. 1 (G187) and Throttle Valve Drive Angle sensor No. 2 (G188) at idle stop. 
Specification for Throttle Valve Drive Angle sensor No. 1 (G187) is 3-16 percent. Specification for 
Throttle Valve Drive Angle sensor No. 2 (G188) is 97-82 percent.  

4. Operate accelerator pedal slowly to Wide Open Throttle and observe percentage (voltage) readings for 

Throttle Valve Drive Angle sensor No. 1 (G187) and Throttle Valve Drive Angle sensor No. 2 (G188). 
Specification for Throttle Valve Drive Angle sensor No. 1 (G187) is 3-93 percent (0.15-4.65 volts). 
Specification for Throttle Valve Drive Angle sensor No. 2 (G188) is 97-3 percent (4.90-0.15 volts). If 
throttle valve drive angle sensor tests are not okay, go to step 7 . If throttle valve drive angle sensor tests 

NOTE:

Test ranges for throttle valve drive angle sensors may not fully display on scan 
tool. 

NOTE:

If TVCM (J338) is replaced it must be adapted to the ECM and A/T Control 
Module (if equipped). 

 

2003 Volkswagen New Beetle GLS 

2001-2003 ENGINE PERFORMANCE Self-Diagnostics - 2.0L - Beetle, Golf & Jetta (Engine Codes AVH & AZG)

  

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are okay, go to next step.  

5. Check Accelerator Pedal Position (APP) sensors. See DTC P0226/16610: ACCELERATOR PEDAL 

POSITION SENSOR 1 (G79) ACCELERATOR PEDAL POSITION SENSOR 2 (G185), 
IMPLAUSIBLE SIGNAL 
. If APP sensors are not okay, go to next step. If APP sensors are okay. Erase 
DTC memory. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE . If 
code did not return on test drive, test is complete.  

6. Replace APP sensors as necessary. Erase DTC memory. Verify repair. Test is complete. For vehicles with 

A/T, adapt APP sensors to Transmission Control Module (J217). See A/T BASIC SETTING . On all 
models, perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE .  

7. Turn ignition off. Disconnect ECM harness connector. Leave ECM disconnected from test box. Connect 

Test Box (VAG 1598/31) to ECM harness connector. See CONNECTING VAG TEST BOX . Using 
DVOM, check resistance between TVCM (J338) 6-pin harness connector and test box sockets. See 
TVCM (J338) 6-PIN HARNESS CONNECTOR/VAG TEST BOX SOCKET IDENTIFICATION 
table. Record resistance readings. Resistance should be a maximum of 1.5 ohms for each reading. Check 
wiring in TVCM (J338) 6-pin harness connector for short circuits to one another, and for short circuits to 
B+ and ground. If resistance measurements are okay and no short circuits exist, go to next step. If any 
resistance measurement is not okay, or a short circuit exists, repair circuit(s) as necessary. After repairs, 
erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST DRIVE 
RELEARN PROCEDURE 
.  

8. Turn ignition on. Using DVOM, measure voltage between TVCM (J338) 6-pin harness connector 

specified terminals. See TVCM (J338) VOLTAGE SPECIFICATIONS table. See Fig. 20 . Record 
voltage readings. If voltage readings are not okay, go to next step. If voltage readings are okay, resistance 
measurements are okay and no short circuits exist, replace faulty TVCM. After repairs, erase DTC 
memory. Verify repair. Test is complete. Adapt TVCM (J338) to ECM (J220). See THROTTLE 
VALVE CONTROL MODULE (J338) 
. For vehicles with A/T, adapt TVCM (J338) to Transmission 
Control Module (J217). See A/T BASIC SETTING . On all models, perform ECM relearn procedure. 
See TEST DRIVE RELEARN PROCEDURE .  

9. Check ECM voltage supply. See ECM GROUND & VOLTAGE SUPPLY under ECM (J220) ME SFI 

CONTROL MODULE. If ECM ground circuits and ECM voltage supply are okay, go to next step. If 
ECM ground circuits and/or ECM voltage supply are not okay, repair as necessary. After repairs, erase 
DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST DRIVE 
RELEARN PROCEDURE 
.  

10. Replace faulty ECM. See ENGINE CONTROL MODULE REMOVAL & INSTALLATION . Erase 

DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST DRIVE 
RELEARN PROCEDURE 
.  

DTC P0513/16897: IMMOBILIZER - INCORRECT CODE 

Test Requirements 

Ensure all fuses are okay, battery voltage is at least 11.5 volts, all electrical accessories are off, A/C is off. 
Engine is mechanically sound. Ensure engine coolant temperature is at least 176°F (80°C).  

Immobilizer Adaptation To ECM (J220) 

NOTE:

Manufacturer recommends using Scan Tool VAG 1551/1552 or VAS 5051/5052. 

 

2003 Volkswagen New Beetle GLS 

2001-2003 ENGINE PERFORMANCE Self-Diagnostics - 2.0L - Beetle, Golf & Jetta (Engine Codes AVH & AZG)

  

Helpmelearn Repair Manuals 

 

Wednesday, December 14, 2005 8:49:57 AM

Page 107 

© 2004 Mitchell Repair Information Company, LLC. 

 

 

 

 

 

 

 

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