3 years ago

5.5 initial diagnostic check: efi -

5.5 initial diagnostic check: efi -

HOME s0448x9x IAC motor

HOME s0448x9x IAC motor [87A] [87B] A B C D BK/O BK/PK BE/GN BN/R BE/GN BN/R BK/PK BK/O [78B] [78A] ECM 17 18 35 36 Figure 5-39. IAC Circuit Table 5-19. Wire Harness Connectors in Figure 5-39. NO. DESCRIPTION TYPE LOCATION [78] ECM 36-Place Packard Under Right Side Cover [87] IAC 4-Place Packard Below Fuel Tank (Right Side) 5-56 2004 Touring: Engine Management (EFI)

HOME Test 5.16 (Part 1 of 2) IDLE AIR CONTROL: DTC P0505 Remove air cleaner cover and element. Is throttle valve completely closed? YES Lubricate and adjust throttle cables. 1 NO Monitor IAC pintle for 10 seconds after turning ignition OFF. Does pintle extend and then retract during 10 second key OFF reset procedure? YES NO Check intake manifold for leaks. See 5.9 INTAKE LEAK TEST. Leaks found? Disconnect IAC and connect test lamp. See Figure 5-36. Turn ignition switch to IGNITION for 2 seconds, and then OFF for 10 seconds. YES NO 2 Check test lamp during key ON/OFF cycle. Repair intake leak. Check fuel pressure. See Section 5.15 FUEL PRESSURE TEST. Problem indicated. Normal behavior. Remove test lamp. Connect Breakout Box to Connector [78B] leaving ECM disconnected. Check Terminal 31 for 12 volts. Battery voltage present? Repair faulty IAC connection or IAC assembly. YES NO Using DVOM, measure resistance between IAC connector [87B] and Breakout Box. Go to Test 5.13. No ECM Power. IAC WIRE COLOR ECM A BE/GN to 35 B BN/R to 36 3 C BK/PK to 18 D BK/O to 17 4 Does each wire measure 0.5 ohms or less? YES NO 4 Turn ignition ON. With ECM still disconnected, check voltage on all four sockets of Connector [87B]. Is voltage present? Repair poor connection at Connectors [87B] or [78B], or repair open wire in harness. YES NO Clear codes using speedometer self diagnostics. See 5.6 SPEEDOMETER SELF DIAGNOSTICS. Confirm proper operation with no check engine lamp. Locate and repair short to voltage. STOP Go to Test 5.16 (Part 2 of 2). 2004 Touring: Engine Management (EFI) 5-57

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