DTC C1900, C1901, C1905, C1906, C1907, C1908, C1909, C1922, C1927, C1928: Inspection 1 RAS Control Unit Malfunction Infiniti M45 III рестайлинг

1. CHECK SELF-DIAGNOSIS RESULTS Check self-diagnosis results. With CONSULT-III SELF-DIAGNOSIS RESULTS REFERENCE Self-diagnostic results CONTROL UNIT [ABNORMAL1] [C1900] CONTROL UNIT [ABNORMAL2] [C1901] CONTROL UNIT [ABNORMAL3] [C1905] CONTROL UNIT [ABNORMAL5] [C1906] CONTROL UNIT [ABNORMAL4] [C1907] CONTROL UNIT [ABNORMAL7] [C1908] CONTROL UNIT [ABNORMAL6] [C1909] CONTROL UNIT [ABNORMAL8] [C1922] CONTROL UNIT [ABNORMAL5] [C1927] CONTROL UNIT [ABNORMAL9] [C1928] Without CONSULT-III DTC REFERENCE CHART DTC (warning lamp blinks) 11 Is above displayed on self-diagnosis display? YES: Replace RAS control unit. Perform self-diagnosis again after replacing. NO: INSPECTION END

Scheme 45

Scheme 46

Scheme 47

Scheme 48

1. CHECK RAS CONTROL UNIT CONNECTOR Turn ignition switch OFF, disconnect RAS control unit harness connector and RAS motor harness connector, and check terminal for deformation, disconnection, looseness, etc. Reconnect harness connector securely, and perform self-diagnosis. With CONSULT-III SELF-DIAGNOSIS RESULTS REFERENCE Self-diagnosis results MOTOR VOLTAGE [LOW VOLTAGE] [C1911] MOTOR VOLTAGE [BAD OBSTRCT] [C1912] Without CONSULT-III DTC REFERENCE CHART DTC (warning lamp blinks) 12 Is above displayed on self-diagnosis display? YES: GO TO 2. NO: Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the terminal.
2. CHECK RAS MOTOR RELAY BATTERY CIRCUIT Turn ignition switch OFF, and disconnect RAS motor relay harness connector B480. Check voltage between RAS motor relay harness connector B480 and ground. Terminal 3 - Ground : Battery voltage (Approx. 12 V) OK or NG OK: GO TO 3. NG: RAS motor relay power supply circuit open or shorted. Repair or replace power supply circuit and fuse.
3. CHECK RAS MOTOR RELAY HARNESS Disconnect RAS motor relay harness connector B480 and RAS control unit harness connector B476. Check continuity between RAS motor relay harness connector B480 and RAS control unit harness connector B476. Terminal 5 - 37 : Continuity should exist . Terminal 1 - 25 : Continuity should exist . Check continuity between RAS motor relay harness connector B480 and ground. 2 - Ground : Continuity should exist . OK or NG OK: GO TO 4. NG: RAS motor relay harness open or shorted. Repair or replace applicable malfunctioning harness.
4. CHECK RAS MOTOR RELAY RESISTANCE Check the resistance between RAS motor relay connector. Terminal 1 - 2 : Approx. 74 ohms OK or NG OK: GO TO 5. NG: RAS motor relay malfunction (replacement)
5. CHECK RAS CONTROL UNIT OUTPUT SIGNAL Connect RAS control unit harness connector B476 and RAS motor relay harness connector B480. Check voltage between RAS motor relay harness connector B480 and ground. 1 - Ground Ignition switch ON : Battery voltage (Approx. 12 V) Ignition switch OFF : Approx. 0V OK or NG OK: Check RAS motor relay separately from other parts. Refer to " «COMPONENT INSPECTION»(ref-356291-S01290320212010021300000) ". NG: RAS control unit malfunction (replacement).

Scheme 49

Scheme 50

1. CHECK RAS CONTROL UNIT CONNECTOR Turn ignition switch OFF, disconnect RAS control unit harness connector and RAS motor harness connector, and check terminal for deformation, disconnection, looseness, etc. Reconnect harness connector securely, and perform self-diagnosis. With CONSULT-III SELF-DIAGNOSIS RESULTS REFERENCE Self-diagnosis results MOTOR OUTPUT [ABNORMAL SIG] [C1913] MOTOR OUTPUT [REV CURRENT] [C1902] MOTOR OUTPUT [NO CURRENT] [C1903] MOTOR OUTPUT [OVERCURRENT] [C1904] MOTOR OUTPUT [MOTOR LOCK] [C1910] Without CONSULT-III DTC REFERENCE CHART DTC (warning lamp blinks) 13 Is above displayed on self-diagnosis display? YES: GO TO 2. NO: Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the terminal.
2. CHECK RAS MOTOR RESISTANCE Turn ignition switch OFF, and disconnect RAS motor harness connector B463. Check the resistance RAS motor connector. Terminal 1 - 2 : Approx. 0.6 ohms OK or NG OK: GO TO 3. NG: RAS motor malfunction. Replace RAS motor.
3. CHECK RAS MOTOR HARNESS Connect RAS motor harness connector B463. Disconnect RAS control unit harness connector B476. Check continuity RAS control unit harness connector B476. Terminal 38 - 39 : Continuity should exist . OK or NG OK: RAS control unit malfunction. Replace RAS control unit. NG: Harness between RAS motor and RAS control unit open or shorted. Repair or replace harness.