Test NTC-33A: Checking Water-In-Fuel Light & Sensor
NOTE:
This test applies to vehicles equipped with diesel engine experiencing problems with WATER-IN-FUEL light only. For connector terminal identification, see CONNECTOR IDENTIFICATION . For component location and wiring diagram, see WIRING DIAGRAMS article.
- Disconnect Water-In-Fuel (WIF) sensor connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A: ROAD TEST VERIFICATION . If connector and terminals are okay, go to next step.
- Connect a jumper wire between ground and WIF sensor connector, sensor signal circuit (Dark Green/Red wire). Turn ignition off, then on to recycle light. If WIF light comes on, perform TEST NTC-33B: CHECKING WATER-IN-FUEL LIGHT & SENSOR . If WIF light does not come on, turn ignition off and go to next step.
- Turn ignition on. Disconnect Powertrain Control Module (PCM) connectors. Inspect connectors and terminals for damage. Repair connectors and terminals as necessary and perform TEST VER-2A: ROAD TEST VERIFICATION . If connectors and terminals are okay, go to next step.
- Using an external ohmmeter, check resistance of WIF sensor signal circuit (Dark Green/Red wire) between WIF sensor connector and PCM Black connector. If resistance is 5 ohms or more, repair open WIF sensor signal circuit and perform TEST VER-2A: ROAD TEST VERIFICATION . If resistance is less than 5 ohms, go to next step.
- Turn ignition on. Using an external voltmeter, check voltage on PCM Gray connector, WIF light driver circuit (Tan/Orange wire). If voltage is more than 10 volts, replace PCM and perform TEST VER-2A: ROAD TEST VERIFICATION . If voltage is 10 volts or less, go to next step.
- Disconnect WIF light connector. Inspect connector and terminals for damage. Repair connector and terminals as necessary and perform TEST VER-2A: ROAD TEST VERIFICATION . If connector and terminals are okay, go to next step.
- Inspect WIF light bulb. If bulb is burned-out, replace bulb and perform TEST VER-2A: ROAD TEST VERIFICATION . If bulb is okay, reinstall bulb and go to next step.
- Using an external voltmeter, backprobe message center connector, fused ignition switch output circuit (Light Green/Yellow wire). If voltage is 10 volts or less, repair open fused ignition switch output circuit and perform TEST VER-2A: ROAD TEST VERIFICATION . If voltage is more than 10 volts, go to next step.
- Connect a jumper wire between ground and PCM Gray connector, WIF light driver circuit (Tan/Orange wire). If WIF light does not come on, repair open WIF light driver circuit and perform TEST VER-2A: ROAD TEST VERIFICATION . If WIF light comes on, replace message center printed circuit assembly and perform TEST VER-2A: ROAD TEST VERIFICATION .