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Home >> Suzuki >> 2001 >> XL-7 Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (Engine General Information & Diagnosis) >> H27 Engine >> Diagnostic Information & Procedures >> DTC P0128: Coolant Thermostat (Coolant Temperature below Thermostat Regulating Temperature) >> P0128 Confirmation Procedure

P0128 Confirmation Procedure

WARNING: This page is about a different car, the 2004 Suzuki XL-7 and 2004 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
  • When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
  • Road test should be carried out with 2 persons, a driver and a tester, on a level road.
NOTE: Check to make sure that the following conditions are satisfied when using this "DTC Confirmation Procedure".
  • Intake air temp.:  -8°C (18° F) or higher
  • Engine coolant temp.:  -8-80°C (18-176°F)
  • Altitude (barometric pressure):  2400 m, 8000 ft or less (560 mmHg (75 kPa) or more)
  1. Connect scan tool to DLC with ignition switch turned OFF.
  2. Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and start engine.
  3. Increase vehicle speed to 80-100 km/h (50-60 mph).
  4. Keep driving above vehicle speed for 20 min. or more (or until engine coolant temperature reaches 80°C (176°F)) (Change of vehicle speed is permitted in this step).
  5. Stop vehicle.
  6. Check DTC and pending DTC by using scan tool.
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