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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Engine Controls - Self-Diagnostics - 2.0L) >> Diagnostic Tests >> DTC P0460: Fuel Gauge Sender Unit Circuit Malfunction >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform DTC confirmation procedure. See DTC CONFIRMATION PROCEDURE  under SELF-DIAGNOSTIC SYSTEM. Check for DTCs during KOER self-test. If DTC P0460 is present, go to next step. If DTC P0460 is not present, problem is intermittent. See TROUBLE SHOOTING - NO CODES article.
  2. Turn ignition off. Disconnect in-line 16-pin connector located at back of joint box. See Figure . Check for damaged or corroded in-line 16-pin connector terminals. Repair as necessary, and go to step  11 . If connector terminals are okay, go to next step.
  3. Using scan tool, select FLI V PID data. If FLI V PID is about 5 volts, go to next step. If FLI V PID indicates battery voltage, repair short to power in suspect circuit. See WIRING DIAGRAMS article. Go to step  11 . If FLI V PID indicated zero volts, repair short to ground. See WIRING DIAGRAMS article. Go to step  11 .
  4. Turn ignition on. Measure voltage between in-line 16-pin female connector terminal "B" (Green/Yellow wire) and ground. If about 5 volts is present, go to next step. If about 5 volts is not present, repair open Green/Yellow wire between in-line 16-pin female connector and PCM. See WIRING DIAGRAMS article. Go to step  11 .
  5. Turn ignition off. Connect a fused jumper wire between in-line 16-pin female connector terminals "A" (Black/Orange wire) and "B" (Green/Yellow wire). Using scan tool, select FLI V PID data. If FLI V PID indicated zero volts, go to next step. If FLI V PID did not indicate zero volts, repair open in Black/Orange wire between in-line 16-pin female connector and ground. See WIRING DIAGRAMS article. Go to step  11 .
  6. Turn ignition off. Disconnect fuel gauge sender unit connector. Check for loose, damaged or corroded connector terminals. Repair as necessary, and go to step  11 . If connector terminals are okay, go to next step.
  7. Reconnect in-line 16-pin connector. Using scan tool, select FLI V PID data. If FLI V PID is about 5 volts, go to next step. If FLI V PID indicates battery voltage, repair short to power in suspect circuit. See WIRING DIAGRAMS article. Go to step  11 . If FLI V PID indicated zero volts, repair short to ground in suspect circuit. See WIRING DIAGRAMS article. Go to step  11 .
  8. Measure voltage between fuel gauge sender unit harness connector terminal "B" (Green/Yellow wire) and ground. If 5 volts is present, go to next step. If 5 volts is not present, repair open in Green/Yellow wire between fuel gauge sender unit and in-line 16-pin female connector. See WIRING DIAGRAMS article. Go to step  11 .
  9. Connect a fused jumper wire between fuel gauge sender unit harness connector terminals "B" (Green/Yellow wire) and "C" (Black/Orange wire). Using scan tool, select FLI V PID data. If FLI V PID indicated zero volts, go to next step. If FLI V PID did not indicate zero volts, repair open in Black/Orange wire between fuel gauge sender unit and in-line 16-pin female connector. See WIRING DIAGRAMS article. Go to step  11 .
  10. Inspect fuel gauge sender unit operation. See SYSTEM & COMPONENT TESTING - MIATA, MILLENIA, MPV, PROTEGE, PROTEGE5 & 626 article. Replace fuel gauge sender unit as necessary and go to next step. If fuel gauge sender unit is okay, go to next step.
  11. Reconnect all connections. Turn ignition on. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Check for DTCs during KOER self-test. If DTC P0460 is present, replace PCM and go to next step. See REMOVAL, OVERHAUL & INSTALLATION article. On vehicles equipped with immobilizer system, reprogram ignition key identification numbers. See COMPUTER RELEARN PROCEDURES - IMPORT article in GENERAL INFORMATION. If DTC P0460 is not present, go to next step.
  12. Perform DTC confirmation procedure. See DTC CONFIRMATION PROCEDURE  under SELF-DIAGNOSTIC SYSTEM. Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If any other DTC is present, go to appropriate test.
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