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(1) Be sure that the battery connections are tight and not corroded. (2) Be sure that the 60 way connector is fully engaged with the PCM. (3) Be sure that the 68 way connector is fully engaged with the ECM. (4) Verify that the electrical connections for the ASD relay are clean and free of corrosion. This relay (5) Verify that the electrical connections for the fuel heater relay are clean and free of corrosion. This (6) Be sure the electrical connectors at the ends of the glow plugs (Fig. 9) are tight and free of corrosion. (7) Be sure that the electrical connections at the glow plug relay are tight and not corroded. The glow (8) Inspect the starter motor and starter solenoid connections for tightness and corrosion. (9) Verify that the Fuel Injection Pump electrical connector is firmly connected. Inspect the connector (10) Verify that the fuel heater electrical connector is firmly attached to the filter bowl at the bottom of (11) Verify that the electrical pigtail connector (sensor connector) (Fig. 12) for the fuel injector sen- (12) Inspect for exhaust system restrictions such as pinched exhaust pipes or a collapsed or plugged (13) Verify turbocharger wastegate operation. Refer to Group 11, Exhaust System and Turbo- (14) Verify that the harness connector is firmly connected to the engine coolant temperature sensors. (15) Check for air in the fuel system. Refer to the Air Bleed Procedure. (16) Inspect all fuel supply and return lines for signs of leakage. (17) Be sure that the ground connections are tight and free of corrosion. Refer to Group 8, Wiring for Fig. 9 Glow Plug Connector 1 – GLOW PLUG ELECTRICAL CONNECTOR CAV COLOR FUNCTION 30 RD/DB FUSED B(+) 85 DB/ FUSED ASD RELAY 86 WT GLOW PLUG RELAY 87 GY GLOW PLUG RELAY Fig. 10 Glow Plug Relay #1 Location CAV COLOR FUNCTION 30 VT/RD FUSED B(+) 85 DB/ FUSED ASD RELAY 86 LB/WT GLOW PLUG RELAY 87 GY/YL GLOW PLUG RELAY Fig. 11 Glow Plug Relay #2 Location 14 - 8 FUEL SYSTEM—3.1L DIESEL ENGINE WJ DIAGNOSIS AND TESTING (Continued) 2000 JEEP GRAND CHEROKEE |