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TROUBLE DIAGNOSIS ATC-77 C D E F G H I K L M A B ATC 5. CHECK GROUND CIRCUIT FOR FAN CONTROL AMP. OK or NG OK >> GO TO 6. NG >> Repair harness or connector. 6. CHECK FOR AUTO AMP. OUTPUT Reconnect the fan control amp. harness connector. OK or NG OK >> GO TO 9. NG >> ● If the voltage is less than 2.5V: GO TO 8. ● If the voltage is more than 9.0V: GO TO 7. 7. CHECK CIRCUIT CONTINUITY BETWEEN AUTO AMP. AND FAN CONTROL AMP. Disconnect the auto amp. harness connector and fan control amp. OK or NG OK >> Replace fan control amp. NG >> Repair harness or connector. 8. CHECK FAN CONTROL AMP. Disconnect the fan control amp. harness connector. OK or NG OK >> GO TO 9. NG >> Replace fan control amp. Terminal Continuity (+) ( − ) Fan control amp. connector Terminal No. (Wire color) M45 1 (B) Ground Yes RJIA0527E Terminal Condition Voltage (+) ( − ) Fan control amp. connec- tor Terminal No. (Wire color) M45 2 (L/Y) Ground Fan speed: 1 - 4 Approx. 2.5 - 3.5 Fan speed: 5 Approx. 9.0 RJIA0528E Terminal Continuity Auto amp. Fan control amp. Connector Terminal No. (Wire color) Connector Terminal No. (Wire color) M76 35 (L/Y) M45 2 (L/Y) Yes RJIA0788E Terminal Continuity (+) ( − ) Fan control amp. connector Terminal No. (Wire color) Fan control amp. connector Terminal No. (Wire color) M45 2 M45 1 Yes RJIA0530E |