|
|
9. DETECT MALFUNCTIONING PART • Turn ignition switch off. • Disconnect ECM harness connector. • Check the injector control circuits for short to power supply circuits. • Check the following. • Voltage should not exist. INJECTOR NO. POWER SUPPLY CIRCUIT INJECTOR TERMINAL 1 Power supply circuit 2 2 2 3 2 4 2 Is the check result normal? Yes >> Go to the next step. No >> Repair circuit for an open or short in harness or connectors. 10. CHECK INJECTOR RESISTANCE • Check resistance as table shown. • Check the fuel injector resistance as shown in the following: INJECTOR NO. INJECTOR TERMINAL RESISTANCE (APPROXIMATELY) ⍀ (20°C) 1 1 & 2 16 2 1 & 2 3 1 & 2 4 1 & 2 • Check signal output. • Connect ECM connector. • Connect injector connectors. • Check the fuel injector voltage as shown in the following: TERMINAL NO. ITEM CONDITION DATA (AVERAGE DC VOLTAGE) 6 Injector 2 • Engine is running • Warm-up condition • Idle • Accelerate suddenly Voltage: 11 - 14 V 7 Injector 3 27 Injector 1 47 Injector 4 Is the check result normal? Yes >> Go to the next step. No >> Replace injector. DIAGNOSIS & TESTING 03
|