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OK Standard Voltage: TESTER CONNECTION CONDITION SPECIFIED CONDITION 1 (Air pump heater (AI-HTR) relay) - Body ground Always 11 to 14 V Text in Illustration *1 Engine Room Relay Block *2 Air Pump Heater (AI-HTR) Relay NG REPAIR OR REPLACE HARNESS OR CONNECTOR 3. CHECK HARNESS AND CONNECTOR (ECM - AIR PUMP HEATER (AI-HTR) RELAY) (a) Remove the air pump heater (AI-HTR) relay from the engine room relay block. (b) Disconnect the D74 ECM connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance: TESTER CONNECTION CONDITION SPECIFIED CONDITION 2 (Air pump heater (AI-HTR) relay) - D74-60 (HAI1) Always Below 1 Ω 2 (Air pump heater (AI-HTR) relay) or D74-60 (HAI1) - Body ground Always 10 kΩ or higher NG REPAIR OR REPLACE HARNESS OR CONNECTOR OK REPLACE ECM 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P144C,P144D... |