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EC-426 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE] P2100, P2103 THROTTLE CONTROL MOTOR RELAY P2100, P2103 THROTTLE CONTROL MOTOR RELAY Component Description INFOID:0000000009484171 Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle control motor relay is controlled ON/OFF by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM. On Board Diagnosis Logic INFOID:0000000009484172 These self-diagnoses have the one trip detection logic. FAIL-SAFE MODE When the malfunction is detected, ECM enters fail-safe mode and the MlL illuminates. DTC Confirmation Procedure INFOID:0000000009484173 NOTE: If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- ing the next step. 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. PROCEDURE FOR DTC P2100 1. Turn ignition switch ON and wait at least 2 seconds. . PROCEDURE FOR DTC P2103 TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 8V. . Diagnosis Procedure INFOID:0000000009484174 1. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I 1. Turn ignition switch OFF. 2. Check voltage between ECM terminal 34 and ground with CONSULT or tester. DTC No. Trouble diagnosis name DTC detecting condition Possible cause P2100 Throttle control motor ECM detects that the voltage of power source • Harness or connectors (Throttle control motor relay circuit is • Throttle control motor relay P2103 Throttle control motor ECM detects that the throttle control motor relay • Harness or connectors (Throttle control motor relay circuit is • Throttle control motor relay Engine operating condition in fail-safe mode ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return |