4 of ECT sensor harness connector. See Fig. 32 . Using scan tool, observe ECT sensor temperature value.
If ECT sensor temperature value is approximately -50°F (46°C), turn ignition off. Go to step 7 . If ECT
sensor temperature value is approximately 285°F (141°C), turn ignition off. Replace faulty ECT sensor.
After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See
TEST DRIVE RELEARN PROCEDURE .
6. Disconnect ECT sensor harness connector. See Fig. 31 . Using scan tool, observe ECT sensor
temperature value. If after disconnecting ECT sensor harness connector, temperature value is
approximately 285°F (141°C), turn ignition off. Go to next step. If after disconnecting ECT sensor
harness connector, temperature value is approximately -50°F (-46°C), turn ignition off. Replace faulty
ECT sensor. After repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn
procedure. See TEST DRIVE RELEARN PROCEDURE .
7. 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 . Disconnect ECT sensor
harness connector. See Fig. 31 . Using DVOM, measure resistance between ECT sensor harness
connector terminal with No. 3 and test box socket No. 108. See Fig. 32 . Record resistance reading.
Measure resistance between ECT sensor harness connector terminal No. 4 and test box socket No. 93.
Record resistance reading. Resistance should be a maximum of 1.5 ohms for each reading. Go to next
step.
8. Check ECT sensor harness connector terminal No. 3 for short circuit to test box socket No. 93. Check
ECT sensor harness connector terminal No. 4 for short circuit to battery positive and ground. Check ECT
sensor harness connector terminal No. 3 for short circuit to battery positive. Repair as necessary. After
repairs, erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See TEST
DRIVE RELEARN PROCEDURE . If wiring and ECT sensor are okay, 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 .
ECT SENSOR (G62) RESISTANCE
DTC P1297/17705: TURBOCHARGER TO THROTTLE VALVE CONNECTION - PRESSURE LOSS
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).
Temperature °F (°C)
Ohms
86 (30)
1500-2000
104 (40)
1000-1500
122 (50)
800-1000
140 (60)
500-700
158 (70)
375-500
176 (80)
275-375
194 (90)
225-275
2003 Volkswagen New Beetle GLS
2002-2003 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo
Helpmelearn Repair Manuals
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