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Troubleshooting

1. 9 Troubleshooting Troubleshooting Flowchart Compressor cont d From page 15 57 Disconnect the RED terminal from compressor and turn the ignition switch on Measure voltage between the RED terminal and body ground Is there battery voltage YES Replace the compressor clutch View from terminal side Repair open in RED wire between the compressor clutch relay and compressor clutch con nector 15 60 Cooling Fan Timer Unit Input Tests NOTE Perform the following tests with the cooling fan timer connected and the ignition switch ON Correct any abnormality before continuing COOLING FAN TIMER UNIT body ground J RRECTI WIRE TEST DESIRED CORRECTIVE ACTION ONDITION RESULTS IF DESIRED RESULTS POSITION c ARE NOT OBTAINED BLK Check for continuity to Should have continuity Repair open to body ground s YEL BLK Check for battery WHT voltage Check for battery BLK YEL voltage Ignition switch ON Should have battery voltage Check for battery voltage Ignition switch ON Check No 29 fuse if OK repair open in WHT wire Check No 2 fuse if OK repair open in BLK YEL wire Check No 8 fuse if OK repair open in YEL BLK wire Check for battery Replace cooling fan timer unit OYEL WHT voltage Check for battery Repl
2. Troubleshooting Troubleshooting Flowchart Compressor cont d lt PGM FI PGM CARB Engine gt From page 15 57 Turn the ignition switch OFF and reconnect 4 P connector to the compressor clutch relay Turn the ignition switch ON and connect a jumper wire between RED BLU terminal and body ground Does the compressor clutch engage relay Replace the compressor Sie i B5 PGM FI Turn the ignition switch OFF and oo0oo00000Q0Q0Q0000 oo0o0woo0oo0o00 COOKCKSCOOTHODHOO J o0000000 disconnect PGM FI PGM CARB ECU connector and connect the A19 PGM CARB PGM FI ECU test harness Turn the ignition switch ON and connect a jumper wire between A15 PGM FI or A19 PGM CARB terminal and body ground A15 PGM FI i Does the compressor clutch NO engage Ls Disconnect a jumper wire and con nect a jumper wire between B5 PGM FI or D6 PGM CARB ter minal and body ground Repair open in RED BLU wire between the compressor clutch relay and ECU Repair open in BLU BLK wire between A C pressure switch and ECU Does the compressor clutch engage Substitute a Known good ECU and recheck If prescribed volt age is now available replace the original ECU 15 58 ooo0oo0oo0oo0fjo0o0000000000 oo0o0o0o00jo0o0000000000 D6 PGM CARB lt Carbureted Eng
3. ace cooling fan timer unit YEL voltage Connect to body n fan and cooling fan Check for open in BLU between coo ground should come on ling fan timer and condenser fan relay or cooling fan relay If OK check for open YEL WHT BLU between cooling fan timer and con denser fan relay or YEL between coo ling fan timer and cooling fan relay If OK test condenser fan relay or cooling fan relay Check for voltage Approx 11V water temperature Faulty water temp switch short to OWHT GRN below 108 C body ground or faulty cooling fan timer unit 15 61 Servic Do not Spla Do not gas 1S 2 bd 8 Ch Av 15 62 Peace When handling refrigerant R 12 Always wear eye protection e Tips let refrigerant get on your skin or in your eyes if it does Do not rub your eyes or skin sh large quantities of cool water in your eyes or on your skin Rush to a physician or hospital for immediate treatment Do not attempt to treat it yourself Keep refrigerant containers cans of R 12 stored below 40 C 100 F handle or discharge refrigerant in an enclosed area near an open flame it may ignite and produce a poisonous CAUTION 1 Always disconnect the negative cable from the battery whenever replacing air conditioner Parts 2 Keep moisture and dust out of the system When disconnecting any lines plug or cap the fittings immediately don t remove t
4. he caps or plugs until just before the lines are reconnected Before connecting any hose or line apply a few drops of refrigerant oil to the seat of the O ring or flare nut When tightening or loosening a fitting use a second wrench to support the matching fitting When discharging the system don t let refrigerant escape too fast it will draw the compressor oil out of the system Add refrigerant oil after replacing the following parts Condenser csrrrererreeeeseesereeee 10 cc 1 3 f oz Evaporator eaccnces Ovescesce oevces 25 cc 5 6 fl oz Line or hosesssrr ss ee 200610 cC 1 3 fi oz Receiver reereseeresesseree sseeeeee 10 cc 1 3 fl oz Compressor ssersseerereresreseerene On compressor replacement subtract the volume of oil drained from the removed compressor from 100 cc 3 1 3 fl oz and drain the calculated volume of oil from the new compressor 100 cc 3 1 3 fi oz Volume of removed compressor Draining volume OLD COMPRESSOR NEW COMPRESSOR DRAINING VOLUME 100 ect 20 ce 7 Before charging the system it is necessary to evacuate the system age the system with the correct quantity of refrigerant exactly oid discharging with the refrigerant unnecessarily When using an auto gas charger operate it according to the manufacturer s instructions Check that the cooling fan motor runs when turning the A C switch and fan switch ON
5. ine gt From page 15 57 Turn the ignition switch OFF and reconnect 4 P connector to the compressor clutch relay Turn the ignition switch ON and connect a jumper wire between RED BLU terminal and body ground E i rl aN YES Disconnect 6 P connector from the delay control unit ile Connect a jumper wire between RED BLU terminal and body ground fr RED BLU a iz BLK YEL Does the compressor clutch NO Repair open in RED BLU wire engage between compressor relay and delay contro unit Sa Measure voltage between the BLK YEL terminal and body ground A NO Repair open in BLK YEL wire Is there battery voltage between the No 7 7 5 A fuse YES and delay control unit a Check the continuity between BLK oe an terminal and body ground L_ NO Repair open in BLK wire 3 Is there continuity between delay control unit and YES body ground or poor ground Check the continuity BLU BLK terminal between delay control unit and body ground Then A C heater fan switches ON ae Is there continuity YES Repair open in BLU BLK wire between delay control unit and body ground Faulty delay control unit BLK Does the compressor clutch NNO Replace the compressor clutch RED engage relay BLU BLK View from wire side cont d 15 5

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