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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 204 (Engine Controls - Self-Diagnostics - 1.8L - Ca) >> Diagnostic Tests >> DTC P0405 Or DTC P0406: EGR Temperature Sensor >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect EGR temperature sensor harness connector. See Figure . Turn ignition on. Measure voltage between ground and terminal No. 1 (Purple wire) at EGR temperature sensor harness connector. If voltage is about 5 volts, go to next step. If voltage is not about 5 volts, repair open or short in Purple wire between EGR temperature sensor and PCM, then retest system.
  2. Turn ignition off. Check continuity between ground and terminal No. 2 (Black wire) at EGR temperature sensor harness connector. Continuity should exist. Also check circuit for short to voltage. If problem exist, repair as necessary and retest system. If problem does not exist, go to next step.
  3. Remove EGR temperature sensor. Measure resistance between EGR temperature sensor terminals (component side), with EGR temperature sensor at specified temperatures. See EGR TEMPERATURE SENSOR RESISTANCE  table. If resistance is as specified, go to next step. If resistance is not as specified, replace EGR temperature sensor and retest system.
  4. Disconnect EGR volume control valve harness connector. See Figure . Measure resistance between terminal No. 2 and terminals No. 1 and 3, and between terminal No. 5 and terminals No. 4 and 6 at EGR volume control valve terminals (component side). See Figure . Resistance should be 20.9-23.1 ohms at 68°F (20°C). If resistance is as specified, go to next step. If resistance is not as specified, replace and EGR volume control valve and retest system.
  5. Remove EGR volume control valve. Connect EGR volume control valve and PCM harness connectors. Turn ignition on, then off while observing EGR volume control valve shaft. If shaft moves forward and backwards in relation to ignition switch position, go to next step. If shaft does not move forward and backwards in relation to ignition switch position, replace EGR volume control valve and retest system.
  6. No problem is indicated at this time. Problem may be intermittent. See TESTING PROCEDURE  under SELF-DIAGNOSTIC SYSTEM.
EGR TEMPERATURE SENSOR RESISTANCE

Temperature - °F (°C) K/Ohms
32 (0) 620-1050
122 (50) 65-94
212 (100) 11-15
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