Hyundai Tucson: Intermittent Problem Inspection Procedure

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Engine Control - Fuel System / General Information / Intermittent Problem Inspection Procedure

Sometimes the most difficult case in troubleshooting is when a problem symptom occurs but does not occur again during testing. An example would be if a problem appears only when the vehicle is cold but has not appeared when warm. In this case, the technician should thoroughly make out a "Customer Problem Analysis Sheet" and recreate (simulate) the environment and condition which occurred when the vehicle was having the issue.

  1. Clear Diagnostic Trouble Code (DTC).
  2. Inspect connector connection, and check terminal for poor connections, loose wires, bent, broken or corroded pins, and then verify that the connectors are always securely fastened.

  1. Slightly shake the connector and wiring harness vertically and horizontally.
  2. Repair or replace the component that has a problem.
  3. Verify that the problem has disappeared with the road test.
  • Simulating Vibration

a. Sensors and Actuators

: Slightly vibrate sensors, actuators or relays with finger.


Strong vibration may break sensors, actuators or relays

b. Connectors and Harness : Lightly shake the connector and wiring harness vertically and then horizontally.

  • Simulating Heat

a.Heat components suspected of causing the malfunction with a hair dryer or other heat source.


  • DO NOT heat components to the point where they may be damaged.
  • DO NOT heat the ECM directly.
  • Simulating Water Sprinkling

a. Sprinkle water onto vehicle to simulate a rainy day or a high humidity condition.


DO NOT sprinkle water directly into the engine compartment or electronic components.

  • Simulating Electrical Load

a.Turn on all electrical systems to simulate excessive electrical loads. (Radios, fans, lights, rear window defogger, etc.)


     Connector Inspection Procedure

    Handling of Connector a.Never pull on the wiring harness when disconnecting connectors. b.When removing the connector with a lock, press or pull locking lever. c.Listen for a click when locking connectors. This sound indicates that th

     Electrical Circuit Inspection Procedure

    Check Open Circuit Procedures for Open Circuit Continuity Check Voltage Check If an open circuit occurs (as seen in FIG. 1), it can be found by performing Step 2 (Continuity Check Method) or Step 3 (Voltage Check Method) as sho

     Symptom Troubleshooting Guide Chart

    Specifications Fuel Delivery System Sensors Manifold Absolute Pressure Sensor (MAPS) Type : Piezo-Resistive Pressure Sensor type Specification Intake Air Temperature Sensor (IATS) Type : Termistor type   Specific


     Multifunction Switch Inspection

    Check for continuity between the terminals in each switch position as shown below. Inspection (With Diagnostic Tool) In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (d

     Airbag Module- Description

    Driver Air Bag (DAB) DAB is installed in the steering wheel, and electrically connected to the SRSCM via clock spring. It is deployed during frontal impact to protect the driver. Clock Spring Clock spring delivers actuation signal, ge