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Customer Concern: Tests/Procedures: Potential Causes: The battery light is on, but the alternator is charging. Has a code P1246. 1. Disconnect the alternator and the Powertrain Control Module (PCM). Check the Violet (VT) (GENerator MONitor or GENMON) wire from the alternator to pin 20 of the PCM connector and the Red/Pink (RD/PK) (GENerator COMmand or GENCOM) wire from the alternator to pin 45 of the PCM for high resistance, an open, or a short to ground. Repair the wiring as needed. 2. If the wiring checks OK, reconnect the PCM and alternator. Start the engine and monitor the VT wire for a roughly 0-10v square wave signal. The signal will be around 40-50% normally with no loads on the system and minimal charging system output. As the load increases, the duty cycle should increase (NOTE: the duty cycle is a positive duty cycle so as the duty cycle increases, the voltage high time increases). 3. If there is no signal on the wire, disconnect the alternator and with key on check the VT wire for roughly 9-10v from the PCM. If OK, jump the Orange/Light Blue (OG/LB) wire to battery voltage and recheck operation with everything connected. This wire should be battery voltage at all time. If the OG/LB wire has battery voltage, the VT wire shows voltage from the PCM but there is no signal on it with the alternator charging, suspect a faulty, defective or incorrect alternator. Alternator Harness

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CARAVAN, TOWN & COUNTRY, & VOYAGER The dual, 2-speed cooling fans operate simultaneously and are turned on when coolant temperature becomes excessive or A/C head pressure indicates A/C operation. Fan should not operate during engine cranking. With A/C off, cooling fans turn on or off when coolant temperature sensor signals PCM that coolant temperature has reached a specified temperature. Regardless of vehicle speed, fans will turn off when coolant temperature drops. COOLING FAN MOTOR NOTE: If fan motor is noticeably overheated, system voltage may be too high. Check charging system. Disconnect cooling fan motor harness connector. Observe correct polarity. Connect battery voltage to fan motor harness connector terminals. See Fig. 1 or Fig. 2 . If cooling fan motor fails to operate, replace fan motor.

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ACCESSORIES & ELECTRICAL CHARGING SYSTEM TROUBLE SHOOTING Alternator Light Stays Off With Ignition Switch ON Blown fuse See WIRING DIAGRAMS Defective alternator Defective indicator light bulb or socket  Alternator Light Stays OFF With Ignition Switch ON Short in alternator wiring See Testing in ALTERNATOR article See Indicator Warning Lights in STANDARD INSTRUMENTS in the ACCESSORIES & EQUIPMENT section See On-Vehicle Tests in ALTERNATOR article Defective rectifier bridge Defective alternator wiring  Lights or Fuses Burn Out Frequently  Ammeter Gauge Shows Discharge Defective regulator Defective battery Loose or worn drive belt Noisy Defective wiring Defective alternator or regulator Defective ammeter, or improper ammeter wiring connection Loose drive pulley See Bench Tests in ALTERNATOR article See On-Vehicle Tests in ALTERNATOR article See Regulator Check in ALTERNATOR article Check and replace as necessary Check alternator drive belt tension and condition. See Belt Adjustment in TUNE-UP article in the TUNE-UP section Check all wires and wire connections See Bench Tests and On-Vehicle Tests in ALTERNATOR article See Testing in STANDARD INSTRUMENTS in the ACCESSORIES & EQUIPMENT section Tighten drive pulley

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Remove the battery cover. Ensure that all electrical loads are switched OFF and that the engine is cool. Start the engine and allow to IDLE. Whilst the engine is idling, disconnect the battery negative terminal and, using a digital multimeter (DMM), measure the voltage between the terminal on the battery negative cable and the battery positive terminal. If the generator is working, the measured voltage should be within the range 13 V to 15 V. This indicates the system voltage without the battery in circuit. If the generator is inoperative, the engine will stall when the ground lead is disconnected. Repeat the test, using the ground bolt, as indicated (shown dotted on the illustration). There should be hardly any detectable difference in the voltage reading (due to minimal current flow); if there is a detectable difference, clean the cable terminal and the adjacent area of the body. When the voltage has been measured, STOP THE ENGINE. Reconnect the battery or fit a new battery if it was established that the battery was at fault. See: Battery/Service and Repair If the cooling fans operate during the above test, the large demand of current will overload the generator and cause the engine to stall. If the battery is in a low state of charge the voltage will rise momentarily when the battery is disconnected. However, the maximum that the voltage can increase to with this new generator is 25 V and then only for a maximum time of 200 mS.

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1. Recover the refrigerant with a Recovery/Recycling/Charging System. 2. Remove the dashboard lower cover, the knee bolster and the glove box. 3. Remove the ECM. 4. Remove the ABS control unit and the radiator fan control module together with the bracket, then remove the TCM. Remove the security control unit. 5. Disconnect the connectors from the power transistor, blower motor high relay, evaporator temperature sensor, blower motor and the heater sub- harness, then remove the blower motor and heater subharness connectors from the brackets. Disconnect the passenger’s airbag harness clip. 6. Remove the wire harness clips, the three self-tap- ping screws and the pipe cover. 7. Remove the expansion valve covers, then disconnect the suction line and unbolt the expansion valve from the evaporator. NOTE: Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination. 8. Disconnect the drain hose, and remove the seven self-tapping screws. Then pull the evaporator out of the front passengers side to remove it. NOTE: Be careful not to damage the evaporator fins when removing the evaporator. 9. Install in the reverse order of removal. Make note of the following items. If you’re installing a new evaporator, add refrigerant oil (ND-OIL 8). Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil (ND-OIL before installing them. NOTE: Be sure to use the right O-rings for HFC134a (R-134a) to avoid leakage. Be careful not to damage the evaporator fins when installing the evaporator. Install the expansion valve capillary tube with the capillary tube in contact with the suction line directly, and wrap it with tape.