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Home >> Volkswagen >> 2001 >> Jetta GL, 2.0 B >> Repair and Diagnosis >> External Pages >> Different car >> Section 56 (On Board Diagnostic (OBD) - 2.0L 4-CYL. 2V - Aba) >> On Board Diagnostic (OBD) >> Electrical testing >> Electrical test tables

Electrical test tables

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1995 Volkswagen Jetta III, 1995 Volkswagen Golf III, 1995 Volkswagen Cabrio, 1994 Volkswagen Jetta III, and 1994 Volkswagen Golf III. However, it is still accessible from the selected car via links, so may be relevant.
ELECTRICAL TEST (STEPS 1-4)

  • Measuring range: Voltage measurement -V- selected
Test step Test box sockets Component tested Test conditions additional jobs Specified values (1)
1 1 + 54 Motronic Engine Control Module (J220) Diagnostic Trouble Code (DTC) Memory voltage supply
  • Ignition OFF
 Approx. Battery Positive Voltage (B+)
2 1 + 23 Motronic Engine Control Module (J220) voltage supply via Engine Control Module (ECM) Power Supply Relay (J271)
  • Ignition OFF
    • Bridge terminals 9 + 55 of Test box
 Approx. Battery Positive Voltage (B+)
3 bridge 6 + 55 Wiring to Fuel Pump (FP) Relay (J17)
  • Switch ignition ON
 Fuel pump must run audibly
4 briefly bridge 1 + 28 Heated Oxygen Sensor (HO2S) Relay (J278)
  • Ignition ON
    • Bridge terminals 9 + 55 of Test box
 Relay must click audibly
(1) See notes in ELECTRICAL TESTING  .
ELECTRICAL TEST (STEPS 5-7)

  • Measuring range: Voltage measurement -V- selected
Test step Test box sockets Component tested Test conditions additional jobs Specified values (1)
5 bridge 5 + 55 Malfunction Indicator Lamp (MIL)
  • Ignition ON
 MIL must light up, if necessary, repair using wiring diagram
6 1 + 65 Vehicle Speed Sensor (VSS) (G22)
  • Ignition ON
  • Selector lever in D
  • Raise left front wheel and turn
 Fluctuating between 0 and 4 Volts minimum
7 1 + 65 Vehicle Speed Sensor (VSS) (G22) Manual transmission
  • Ignition ON
  • Selector lever in N
  • Raise left front wheel and turn
 Fluctuating between 0 and 4 Volts minimum
(1) See notes on ELECTRICAL TESTING  .
ELECTRICAL TEST (STEPS 8-11)

  • Measuring range: Voltage measurement -V- selected
Test step Test box sockets Component tested Test conditions additional jobs Specified values (1)
Vehicles with automatic transmission only
8 54 + 58 Ground (GND) wire 58 to code Motronic Engine Control Module (ECM) (J220) - Approx. Battery Positive Voltage (B+)
9 7 + 54 Ground (GND) wire 7
  • Ignition ON
  • Selector lever in P and N
 Approx. Battery Positive Voltage (B+)
  • Selector lever in D, 1, 2, 3, R
 No reading or maximum 0.5 Volts
Vehicles with air conditioning only
10 55 + 39 Wire 39 from A/C
  • Ignition ON
  • Switch fan ON
  • Switch A/C ON
 Approx. Battery Positive Voltage (B+)
11 briefly bridge 37 + 38 Wire 37 to A/C compressor
  • Ignition ON
 Magnetic clutch on A/C compressor must click audibly
(1) See notes on ELECTRICAL TESTING  .
ELECTRICAL TEST (STEPS 12-18)

  • Ignition OFF
  • Measuring range: switch to resistance measurement -ohm-.
Test step Test box sockets Component tested Test conditions additional jobs Specified values (1)
12 24 + 23 Cylinder 1 Fuel Injector (N30) - 14-21.5 ohm
13 2 + 23 Cylinder 2 Fuel Injector (N31) - 14-21.5 ohm
14 25 + 23 Cylinder 3 Fuel Injector (N32) - 14-21.5 ohm
15 26 + 23 Cylinder 4 Fuel Injector (N33) - 14-21.5 ohm
16 23 + 31 Evaporative Emissions (EVAP) Canister Purge Regulator Valve (N80) - 40-80 ohm
17 14 + 33 Engine Coolant Temperature (ECT) Sensor (G62) - See Resistance values  .
18 21 + terminal 1 from white Data Link Connector (DLC) Wiring to white DLC (behind cover under heating/vent controls) - Maximum 1.5 ohm
43 + terminal 2 from white DLC Wiring to white DLC (behind cover under heating/vent controls) - Maximum 1.5 ohm
21 + terminal 4 from single Data Link Connector (DLC) Resistance of L wire to DLC - Maximum 1.5 ohm
43 + terminal 1 from single Data Link Connector (DLC) Resistance of K wire to DLC - Maximum 1.5 ohm
19 20 + 42 Wiring to Heated Oxygen Sensor (HO2S) (G39)
  • Disconnect Heated Oxygen Sensor (HO2S) harness connector
  • Bridge terminals 3+ 4 of connector
 Maximum 1.5 ohm
   
  • Reconnect harness connector
 INFINITY ohm
(1) See notes in ELECTRICAL TESTING  .
() If a sensor DTC is displayed during the OBD program, but it is not confirmed by the testing, it can be attributed to an intermittent temperature signal. In this case, also check Engine Coolant Temperature (ECT) Sensor. See MULTIPORT FUEL INJECTION (MFI) .
ELECTRICAL TEST (STEPS 20-22)

  • Ignition OFF
  • Measuring range: switch to resistance measurement -ohm-.
Test step Test box sockets Component tested Test conditions additional jobs Specified values (1)
20 33 + 41 Throttle Position (TP) Sensor (G69) - 1.6-2.4 k ohm
33 + 40
  • Throttle closed
 1.0-2.0 k ohm
  • Open throttle slowly
 Resistance must increase without interruption
40 + 41
  • Throttle closed
 2.5-4.0 k ohm
  • Open throttle slowly
 Resistance must drop without interruption
21 44 + 56 Wiring to Camshaft Position Sensor (G40)
  • Disconnect connector from Camshaft Position Sensor (ignition distributor)
  • Bridge terminals 1+2 of connector
 Maximum 1.5 ohm
44 + 56
  • Bridge terminals 1+3 of connector
22 8 + 55
8 + 38		 Wiring to Ignition Coil Power Output Stage (N157)
  • Disconnect harness connector from Ignition Coil Power Output Stage
 INFINITY ohm
8 + 55
  • Bridge terminals 1+2 of connector
 Maximum 1.5 ohm
  8 + 38
  • Bridge terminals 2+3 of connector
 Maximum 1.5 ohm
(1) See notes on ELECTRICAL TESTING  .
ELECTRICAL TEST (STEPS 23-26)

  • Ignition OFF
  • Measuring range: switch to resistance measurement -ohm-.
Test step Test box sockets Component tested Test conditions additional jobs Specified values (1)
23 33 + 34 Wiring to Knock Sensor 1 (G61)
3-pin harness connector in front of ignition distributor (blue)
  • Disconnect harness connector to Knock Sensor (KS)
 INFINITY ohm
  • Bridge terminals 1 + 2 of connector
 Maximum 1.5 ohm
34 + 56
  • Bridge terminals 1 + 3 of connector
 Maximum 1.5 ohm
24 33 + 36 Intake Air Temperature (IAT) Sensor (G72) - See Resistance values  .
25 27 + 53 Wiring to Idle Air Control (IAC) Valve (N71) - 7-10 ohm
  • Disconnect harness connector from IAC valve
 INFINITY ohm
26 1 + 16 Wiring to Mass Air Flow (MAF) Sensor (G70)
  • Disconnect harness connector from MAF Sensor
  • Bridge terminals 1+2 of connector
 Maximum 1.5 ohm
1 + 23
  • Bridge terminals 1+3 of connector
1 + 17
  • Bridge terminals 1+4 of connector
(1) See notes on ELECTRICAL TESTING  .
ELECTRICAL TEST (STEPS 27-29)

  • Ignition OFF
  • Measuring range: switch to resistance measurement -ohm-.
Test step Test box sockets Component tested Test conditions additional jobs Specified values (1)
27 67 + 68 Engine Speed (RPM) Sensor G28 and wiring 3- pin harness connector in front of ignition distributor (white) - 500-700 ohm
56 + 67
56 + 68		 INFINITY ohm
56 + 67
  • Disconnect sensor harness connector
 Maximum 1.5 ohm
56 + 68
  • Bridge terminals 2 + 3 of connector
28 9 + 56
bridge briefly		 Exhaust Gas Recirculation (EGR) Vacuum Regulator Solenoid Valve (N18) (if installed)
  • Bridge terminals 55 + 30 of test box
 Valve must click audibly
29 23 + 30 Wiring to EGR Vacuum Regulator Solenoid Valve (N18) - 27 -31 ohm
  • Disconnect N18 harness connector
 INFINITY ohm
  • Bridge terminals 1 + 2 of connector
 Maximum 1.5 ohm
(1) See notes on ELECTRICAL TESTING  .
ELECTRICAL TEST (STEP 30)

  • Ignition OFF
  • Measuring range: switch to resistance measurement -ohm-.
Test step Test box sockets Component tested Test conditions additional jobs Specified values (1)
30 15 + 33 EGR temperature sensor (G98)
  • Disconnect N18 harness connector
 INFINITY ohm
  • Bridge terminals 1 + 2 of connector
 Maximum 1.5 ohm
(1) See notes on ELECTRICAL TESTING  .
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