PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
2. Check resistance of Fuel Pump Relay wiring. Resistance should be a maximum of 1.5 ohms for each
reading.
3. Check Fuel Pump Relay wiring for short circuits to one another, and for short circuits to B+ and ground.
4. If resistance, voltage and ground supply are okay and no short circuits are present, replace faulty Fuel
Pump Relay (J17). If resistance and/or voltage or ground supply are not okay or a short circuit is present,
repair as necessary. Erase DTC memory. Test is complete. Perform ECM relearn procedure. See TEST
DRIVE RELEARN PROCEDURE .
DTC P1542/17950 & P1545/17953: TVCM ANGLE SENSOR1
Code Definition
DTC P1542/17950
Angle Sensor 1 (G187) For Throttle Valve Drive - Implausible Signal
DTC P1545/17953
Throttle Valve Control Malfunction
Circuit/Component Description
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.
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
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