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C1 CHECK BLOWER MOTOR SUPPLY VOLTAGE Gain access to the blower motor control connector. Turn ignition switch to the ON position. Using a voltmeter, check voltage at Circuit 687 (GY/Y) at motor connector. Is voltage 10 volts or more? Yes GO to C4. No GO to C2. C2 CHECK CIRCUIT 687 (GY/Y) FOR SHORT Remove blower Fuse 30A at primary junction block. Using an ohmmeter connected to a known good ground, connect second lead to Circuit 687 (GY/Y) at A/C blower motor. Measure resistance. Is resistance 5 ohms or less? Yes SERVICE Circuit 687 (GY/Y) for short. REPLACE fuse. RESTORE vehicle. RETEST system. No GO to C3. C3 CHECK CIRCUIT 687 (GY/Y) FOR OPEN Disconnect A/C blower motor control. Connect a jumper wire to Circuit 687 (GY/Y) at blower motor control connector. Connect other end to a known good ground. Using an ohmmeter connected to a known good ground, connect second lead to Circuit 687 (GY/Y). Measure resistance. Is resistance 5 ohms or less? Yes GO to C4. No SERVICE Circuit 687 (GY/Y) for open. RESTORE vehicle. RETEST system. C4 CHECK BLOWER MOTOR SPEED CONTROL GROUND Gain access to A/C blower motor speed control as outlined. Using an ohmmeter connected to a known good ground, connect second lead to Circuit 57 (BK) at A/C blower motor speed control connector, J1-2. Measure resistance. Is resistance 5 ohms or less? Yes

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FUEL PRESSURE RELEASE Fuel Rail With Fuel Pressure Test Port 1. Disconnect negative battery cable. Remove fuel tank cap to release fuel tank pressure. 2. Remove protective cap from fuel pressure test port on fuel rail. Place one end of Fuel Pressure Gauge (5069) hose into approved gasoline container. Screw remaining end of fuel pressure gauge hose onto fuel pressure test port. Fuel pressure will be released into gasoline container. 3. After fuel pressure is released, remove fuel pressure gauge hose from fuel pressure test port. Reinstall protective cap on fuel pressure test port and fuel tank cap. Reinstall negative battery cable. Fuel Rail Without Fuel Pressure Test Port 1. Remove fuel pump relay from Power Distribution Center (PDC), located near windshield washer reservoir. Refer to label on PDC cover for relay location. 2. Start engine and allow to idle until engine stalls. Attempt to start engine several times. Once engine will not restart, turn ignition off. 3. Disconnect electrical connector from any fuel injector. Connect a jumper wire between one fuel injector terminal and positive battery terminal. Connect another jumper wire to remaining fuel injector terminal. CAUTION: DO NOT apply battery voltage to fuel injector for more than 4 seconds, or fuel injector may be damaged. 4. Momentarily touch remaining end of jumper wire to negative battery terminal for no more than 4 seconds. Cover fuel line at fuel rail with shop towel before disconnecting. Disconnect fuel line. 5. Disconnect jumper wires. Reinstall electrical connector on fuel injector. Reinstall fuel pump relay. Diagnostic Trouble Codes (DTCs) may be stored in Powertrain Control Module (PCM) when ASD relay is removed. To clear DTCs from PCM, see TESTS W/CODES – 2.5L article. FUEL PRESSURE TEST

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1. Remove fuel pump relay from power distribution center at driver’s side front corner of engine compartment, near the battery. Note terminal identification on fuel pump relay. See Fig. 6 . 2. To check fuel pump relay resistance, use ohmmeter and check resistance between terminals No. 85 and 86 on fuel pump relay. Replace fuel pump relay if resistance is not 70-80 ohms. 3. To check fuel pump relay operation, connect ohmmeter between terminals No. 30 and 87A on fuel pump relay. See Fig. 6 . Ohmmeter should indicate continuity between terminals No. 30 and 87A on fuel pump relay. 4. Connect ohmmeter between terminals No. 30 and 87 on fuel pump relay. See Fig. 6 . Ohmmeter should indicate no continuity between terminals No. 30 and 87 on fuel pump relay. CAUTION: DO NOT allow ohmmeter leads to contact terminals No. 85 and 86 on fuel pump relay when fuel pump relay is energized. 5. Connect 16-gauge jumper wire between negative battery terminal and terminal No. 85 on fuel pump relay. Connect 16-gauge jumper wire between positive battery terminal and terminal No. 86 on fuel pump relay. 6. Fuel pump relay should now be energized. No continuity should now exist between terminals No. 30 and 87A on fuel pump relay. Continuity should now exist between terminals No. 30 and 87 on fuel pump relay. Disconnect jumper wires. Replace fuel pump relay if defective. 7. If fuel pump relay or wiring circuit failure exists, a Diagnostic Trouble Code (DTC) will be stored in Powertrain Control Module (PCM). See appropriate G – TESTS W/CODES article.

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To erase anti-lock brake system (ABS) DTCs on 1998 Passports without the PGM Tester, use the procedure in this bulletin. The procedure in the 1998 Passport Service Manual is incorrect. NOTE: You can erase ABS DTCs with the PGM Tester when the SN811 software version becomes available. On page 5A-38 of the Service Manual, cross out step 3, “How to erase code,” and write on the page, “See S/B 97-084 for the ABS DTC erasing procedure.” 3. Using the two brown, male connectors from the Connector Test Adapter Kit (T/N J-35616-A), insert one into terminal 4 of the DLC, and the other into terminal 12 of the DLC. Then connect a jumper wire from the kit (any color) between the two connectors. REQUIRED SPECIAL TOOL Connector Test Adapter Kit: TIN J-35616-A ERASING ABS DTCs NOTE: 0 ABS DTCs cannot be erased by disconnecting the battery. Doing this procedure erases a// ABS DTCs (current and stored). 1. Turn the ignition switch OFF (0). 2. Under the driver’s side of the dashboard, locate the 16P DLC (data link connector). / JUMPERWIRE and CONNECl \ 4. Turn the ignition switch ON (II). (The ABS indicator light flashes the DTCs.) Let the light flash on and off at least once. 5. Using your hand, press the brake pedal until you hear the solenoid click, then release the pedal. Do this eight times within 3 seconds. 6. After you

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PINPOINT TEST B: INCORRECT FUEL GAUGE INDICATION — SINGLE FUEL TANK NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector. NOTE: The fuel pump module may also be called the fuel tank unit or fuel level sender. B1 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND INSTRUMENT CLUSTER SELF-TESTS Ignition OFF. Check for recorded instrument cluster DTCs from the continuous and on-demand self-tests. Are any instrument cluster DTCs recorded? Test Step B2 CARRY OUT THE INSTRUMENT CLUSTER FUEL GAUGE ACTIVE COMMAND USING THE SCAN TOOL Ignition ON. Enter the following diagnostic mode on the scan tool: Instrument Cluster Active Command. Select the instrument cluster active command. Trigger, monitor, and scroll the fuel gauge level at 0%, 50%, and 100%. Does the fuel gauge display below E with 0%, half with 50%, and full stop with 100%? B3 CHECK THE FUEL PUMP MODULE FOR AN OPEN Disconnect: Fuel Pump ModuleC434 or C4033. Connect a fused (5A) jumper wire between the fuel pump module as follows: Connector-Pin C434-2 C4033-5 Ignition ON. Enter the following diagnostic mode on the scan tool: Instrument Cluster Self-Test. Wait one minute. NOTE: Once set, it is normal for DTC B1201 to be present when carrying out this test step and should be ignored. Clear the instrument cluster DTCs. Repeat the instrument cluster self-test. Is DTC B1204 retrieved? B4 CHECK CIRCUITS 29 (YE/WH) AND 396 (BK/OG) FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect: Instrument Cluster C220b. Ignition ON. Measure the voltage between the instrument cluster C220b-10, circuit 29 (YE/WH), harness side and ground; and between the instrument cluster C220b-8, circuit 396 (BK/OG), harness side and ground. Circuit Connector-Pin 29 (YE/WH) 29 (YE/WH) Circuit C434-4 396 (BK/OG) C4033-8 396 (BK/OG) Is any voltage present? B5 CHECK CIRCUITS 29 (YE/WH) AND 396 (BK/OG) FOR AN OPEN Ignition OFF. Measure the resistance between the instrument cluster, harness side and the fuel pump module, harness side as follows: Instrument Cluster Connector-Pin C220b-10 C220b-10 C220b-8 C220b-8 Circuit Fuel Pump Module Connector-Pin 29 (YE/WH) 29 (YE/WH) 396 (BK/OG) 396 (BK/OG) C434-2 C4033-5 C434-4 C4033-8 Are the resistances less than 5 ohms? B6 CHECK THE FUEL PUMP MODULE FOR A SHORT TO GROUND Disconnect: Fuel Pump Module C434 or C4033. Ignition ON. Wait one minute. Enter the following diagnostic mode on the scan tool: Instrument Cluster Self-Test. NOTE: Once set, it is normal for DTC B1204 to be present when carrying out this test step and should be ignored. Clear the instrument cluster DTCs. Repeat the instrument cluster self-test. Is DTC B1201 retrieved? B7 CHECK CIRCUIT 29 (YE/WH) FOR A SHORT TO GROUND Disconnect: Instrument Cluster C220b. Measure the resistance between the instrument cluster C220b-10, circuit 29 (YE/WH), harness side and ground.