DTC P1489: High Speed Fan Control Relay Circuit

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

NOTE: High speed fan control relay is referred to as high speed radiator fan relay in this test. High speed radiator fan relay operation is monitored when ignition is on and battery voltage is more than 10 volts. DTC may be stored in PCM if an open or shorted condition is detected in high speed radiator fan relay control circuit. Possible causes are: defective high speed radiator fan relay, defective PCM, or defective connectors or wiring.

Turn ignition on with engine off. Using scan tool, actuate high speed radiator fan relay. Listen for clicking sound at high speed radiator fan relay. High speed radiator fan relay is located in power distribution center at driver's side front corner of engine compartment, near air cleaner assembly. See Fig 1. If clicking sound is heard at high speed radiator fan relay, go to next step. If no clicking sound is heard at high speed radiator fan relay, go to step 4.

Fig 1: Locating Relays & Identifying Power Distribution Center Cavities
Courtesy of CHRYSLER CORP.
Turn ignition off. Inspect wiring and connectors between high speed radiator fan relay and PCM. PCM is located at driver's side front corner of engine compartment, just below air cleaner assembly. If no problems exist, go to next step. If any problems exist, repair wiring or connectors as necessary. Perform TEST VER-2A .
Turn ignition on with engine off. Using scan tool, actuate high speed radiator fan relay. Wiggle wiring harness and connectors from high speed radiator fan relay to PCM while high speed radiator fan relay is still actuated. If clicking sound at high speed radiator fan relay was not interrupted while wiggling wiring harness and connectors, test is complete. If clicking sound at high speed radiator fan relay was interrupted while wiggling wiring harness and connectors, repair wiring or connectors as necessary. Perform TEST VER-2A .
Turn ignition off. Remove high speed radiator fan relay from power distribution center. Note which terminals on high speed radiator fan relay correspond with cavities in power distribution center. See Fig 1. Using ohmmeter, check resistance between terminals on high speed radiator fan relay that corresponds with cavities No. 94 and 96 in power distribution center. If resistance is less than 100 ohms, go to next step. If resistance is 100 ohms or more, replace high speed radiator fan relay. Perform TEST VER-2A .
Turn ignition on with engine off. Using voltmeter, check voltage at cavity No. 94 (Light Green/Black wire) for high speed radiator fan relay in power distribution center. See Fig 1.
If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open circuit on Light Green/Black wire to high speed radiator fan relay. The Light Green/Black wire goes from high speed radiator fan relay in power distribution center to fuse No. 9 in power distribution center which receives power from ignition switch. Perform TEST VER-2A .
Ensure ignition is off. Disconnect connectors at PCM. PCM is located at driver's side front corner of engine compartment, just below air cleaner assembly.
Note cavity identification for high speed radiator fan relay in power distribution center. See Fig 1. Using ohmmeter, check resistance between cavity No. 96 (Dark Blue/Pink wire) for high speed radiator fan relay in power distribution center and PCM connector terminal No. 69 (Dark Blue/Pink wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open circuit on Dark Blue/Pink wire between PCM and cavity No. 69 for high speed radiator fan relay in power distribution center. Perform TEST VER-2A .
Ensure high speed radiator fan relay is removed from power distribution center. Using ohmmeter, check resistance between ground and PCM connector terminal No. 69 (Dark Blue/Pink wire). If resistance is 5 ohms or more, replace PCM. Perform TEST VER-2A . If resistance is less than 5 ohms, repair short to ground on Dark Blue/Pink wire between PCM and high speed radiator fan relay. Perform TEST VER-2A .