Test K: Integrated Circuit Display Inaccurate Or Inoperative
WARNING: This page is about a different car, the 2002 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition switch to LOCK position. Disconnect NGV module 60-pin harness connector C1009. NGV module is located on left inner fender well, behind coolant recovery bottle. Connect NGV module 60-pin harness connector C1009 to 60-pin Breakout Box (014-00322) following manufacturer's instructions. Leave NGV module disconnected from breakout box. Turn ignition switch to ON position. Measure voltage between breakout box pin No. 37 or 57 and pin No. 40 or 60. If voltage is more than 10 volts, go to step 5. If voltage is 10 volts or less, go to next step.
- Turn ignition switch to LOCK position. Measure resistance between breakout box pins No. 26 and 37. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short between NGV module 60-pin harness connector terminals No. 26 (Brown/White wire) and No. 37 (Red wire). See Figure. See WIRING DIAGRAMS . Retest system operation.
- Measure resistance between breakout box pin No. 26 and pin No. 40 or 60. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in NGV module 60-pin harness connector terminal No. 26 (Brown/White wire). See WIRING DIAGRAMS . Retest system operation.
- Measure resistance between ground and breakout box pin No. 40 or 60. If resistance is 5 ohms or more, replace NGV module. See NATURAL GAS VEHICLE MODULE under REMOVAL & INSTALLATION. Retest system operation. If resistance is less than 5 ohms, repair open in NGV module 60-pin harness connector terminal No. 37 or 57 (Red wires). See Figure. See WIRING DIAGRAMS . Retest system operation.
- Connect NGV module to breakout box. Measure resistance between breakout box pin No. 16 and pin 40 or 60. If resistance is less than 5 ohms, go to next step. If resistance 5 ohms or more, replace NGV module. See NATURAL GAS VEHICLE MODULE under REMOVAL & INSTALLATION. Retest system operation.
- Disconnect instrument cluster White 16-pin harness connector. Measure resistance between breakout box pin No. 16 and instrument cluster White 16-pin harness connector C220a terminal No. 5 (Black/White wire). See Fig 1. If resistance is less than 5 ohms, replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION in ANALOG INSTRUMENT PANELS - ECONOLINE - GASOLINE & DIESEL article. If resistance is 5 ohms or more, repair open in Black/White wire. See WIRING DIAGRAMS . Retest system operation.