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U–60 ON-BOARD DIAGNOSTIC End Of Sie DTC 19 A6E857001038W12 Diagnostic Procedure End Of Sie DTC 21 A6E857001038W13 Diagnostic Procedure End Of Sie 2 • Disconnect airflow mode actuator connector. • Is resistance between terminals 1U and 1I of climate control unit connector (24-pin) more Yes Go to next step. No Repair wiring harness. (Short circuit) 3 • Disconnect climate control unit connector (24-pin). • Is resistance between terminals 1B and 1I of climate control unit connector (24-pin) less Yes Go to next step. No Repair wiring harness. (Open circuit) 4 • Is resistance between terminals 1B and 1U of climate control unit connector (24-pin) less Yes Replace climate control unit. No Repair wiring harness. (Open circuit) STEP INSPECTION ACTION DTC 19 Air mix actuator (potentiometer) system inspection POSSIBLE CAUSE • Air mix actuator malfunction • Climate control unit malfunction • Open circuit between air mix actuator and climate control unit • Short circuit between air mix actuator (terminal C) and climate control unit (terminal 1U: 24-pin) STEP INSPECTION ACTION 1 • Inspect air mix actuator. • Is it okay? Yes Go to next step. No Replace air mix actuator. 2 • Disconnect climate control unit connector (24-pin) and air mix actuator connector. • Is there open circuit between following terminals of climate control unit connector Yes Repair wiring harness. No Go to next step. 3 • Is there short circuit to ground between terminal 1U of climate control unit connector Yes Repair wiring harness. No This system is normal at present. (Erase the past failure DTC 21 Airflow mode actuator (potentiometer) system inspection POSSIBLE CAUSE • Airflow mode actuator malfunction • Climate control unit malfunction • Open circuit between airflow mode actuator and climate control unit • Short circuit between airflow mode actuator (terminal C) and climate control unit (terminal 1W: 24-pin) STEP INSPECTION ACTION 1 • Inspect airflow mode actuator. • Is it okay? Yes Go to next step. No Replace airflow mode actuator. 2 • Disconnect air mix actuator connector. • Is resistance between terminals 1W and 1I of climate control unit connector (24-pin) more Yes Go to next step. No Repair wiring harness. (Short circuit) 3 • Disconnect climate control unit connector (24-pin). • Is resistance between terminals 1B and 1I of climate control unit connector (24-pin) less Yes Go to next step. No Repair wiring harness. (Open circuit) 4 • Is resistance between terminals 1B and 1W of climate control unit connector (24-pin) less Yes Replace climate control unit. No Repair wiring harness. (Open circuit) |