Automatic Transmission

1.9L, Automatic Transmission, With A/C:

1. Check fuse and fusible link.

^ Are both OK?

YES -- Go to step 2.

NO -- Replace and retest.

2. Determine when fan does or does not operate.

NOTE: The fan controller for non-A/C vehicles incorporates an internal non-cycling circuit breaker that opens the circuit to the fan motor in case of a stall or short circuit.

^ Operates during A/C operation only, does not operate during high coolant temperature, go to Step 3.

^ Does not operate during A/C operation or during high engine coolant temperatures, go to step 11.

^ Operates during high engine coolant temperatures only, go to step 6.

3. Unplug connector at coolant temperature switch. turn the ignition switch to run. Jumper connector to ground with A/C off.

^ Does the fan motor run?

YES -- Go to step 4.

NO -- Go to step 5.

4. Verify the coolant switch ground by checking for continuity from switch body to thermostat housing. Verify the coolant has exceeded 221° F by idling a cold engine for approximately 25 minutes.

^ Does the fan motor run?

YES -- Cooling fan system is OK.

NO -- Replace coolant temperature switch.

5. Unplug connector from cooling fan controller and check continuity of circuit 197 from the controller to coolant temperature switch.

^ Does circuit 197 have continuity?

YES -- Replace cooling fan controller.

NO -- Repair circuit 197.

6. Does the A/C clutch engage?

NO -- Check fuse, if OK then go to step 8.

YES -- Go to step 7.

7. Remove connector from cooling fan controller. Check for voltage at circuits 37, 73, 348, and 687.

^ Is battery voltage present?

YES -- Replace the controller and retest.

NO -- Repair open or short in applicable circuit.

8. Remove the connector from clutch cycling pressure switch and jumper across the connector. Check to see if A/C clutch engages.

^ Does the clutch engage?

YES -- Go to step 9.

NO -- Go to step 10.

9. Check A/C system for refrigerant charge.

^ Are A/C system pressures OK?

YES -- Replace clutch cycling pressure switch.

NO -- Leak test and service the A/C system.

10. Leaving the jumper from step 8 in place, remove connector from A/C control assembly, and jumper circuit 37 to circuit 348 and check for voltage at circuit 198.

^ Is Battery voltage present at circuit 198?

YES -- Replace A/C push button switch.

NO -- Repair open in circuits 198 or 348.

11. Unplug connector at cooling fan motor. Jumper B+ and ground to the fan motor.

^ Does the fan motor run?

YES -- Go to step 12.

NO -- Replace motor.

12. Remove jumper wires and connect harness connector to fan motor. Unplug connector from cooling fan controller and turn ignition switch to run with the A/C on. Check for battery voltage at circuits 37, 73, 687, 198 and 348.

^ Is battery boltage present on all circuits?

YES -- Go to step 13.

NO -- Repair circuit.

13. Jumper circuit 37 to circuit 228 at the cooling fan controller.

^ Does the fan motor run?

YES -- Replace the cooling fan controller.

NO -- Repair motor ground.