DI DIHD DTC P00 Igniter Circuit Malfunction (No. ) DTC P05 Igniter Circuit Malfunction (No. ) DTC P0 Igniter Circuit Malfunction (No. ) DTC P5 Igniter Circuit Malfunction (No. ) CICUIT DESCIPTION A Direct Ignition System (DIS) has been adopted. The DIS improves the ignition timing accuracy, reduces the highvoltage loss, and enhances overall reliability of the ignition system by eliminating the distributor. The DIS is a cylinder ignition system which ignites one cylinder with one ignition coil. In the cylinder ignition system, the spark plug is connected to the end of the secondary winding. High voltage generated in the secondary winding is applied directly to the spark plug. The spark of the spark plug passes through from the center electrode to the ground electrode. The ECM determines ignition timing and outputs the ignition signals (IGT) of each cylinder. Based on IGT signals, the power transistors cut off the current to the primary coil in the ignition coil. At the same time, the igniter also sends an ignition confirmation signal (IGF) as a failsafe measurement to the ECM. DTC No. DTC Detection Condition Trouble Area P00 P05 P0 P5 No IGF signal to ECM while engine is running Ignition system Open or short in IGF and IGT circuit from ignition coil with igniter ignition coil with igniter ECM 00 AV (M89U)
DI WII DIAGAM ECM I No. GB 0 IGT From Terminal of IG elay (See page DI ) I No. I No. LB G IGT IGT N Noise Filter EC I5 No. B 5 IGT IGF A78 00 AV (M89U)
INSPECTION POCEDUE DI HINT: If DTC P00 is displayed, check No. ignition coil with igniter circuit. If DTC P05 is displayed, check No. ignition coil with igniter circuit. If DTC P0 is displayed, check No. ignition coil with igniter circuit. If DTC P5 is displayed, check No. ignition coil with igniter circuit. ead freeze frame data using the TOYOTA handheld tester or OBD II scan tool, as freeze frame data records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the airfuel ratio was lean or rich, etc. at the time of the malfunction. Check spark plug and spark (See page DI59 ). Go to step. Check for open and short in harness and connector in IGF and IGT signal circuit between ECM and ignition coil with igniter (See page IN ). epair or replace harness or connector. Disconnect ignition coil with igniter connector and check voltage between terminals IGF of ECM connector and body ground. ON IGF (+) () A00 PEPAATION: (a) emove the glove compartment door (See page SF65 ). (b) Disconnect the ignition coil with igniter connector. (c) Turn the ignition switch ON. Measure the voltage between terminals IGF of the ECM connector and the body ground. : Voltage:.5 5.5 V eplace ignition coil with igniter. 00 AV (M89U)
DI Check and replace ECM (See page IN ). Check for open and short in harness and connector in IGT signal circuit between ECM and ignition coil with igniter (See page IN ). epair or replace harness or connector. 5 Check voltage between terminals IGT IGT of ECM connector and body ground. IGT IGT IGT IGT (+) () PEPAATION: emove the glove compartment door (See page SF65 ). Measure the voltage between terminals IGT IGT of the ECM connector and the body ground when the engine is cranked. : Voltage: More than 0. V and less than.5 V A58 IGT GND GND IGT and IGFSsignal Waveforms 5 V/ Division eference: INSPECTION USI OSCILLOSCOPE During cranking or idling, check the waveform between terminals IGT IGT and E, IGF and E of the ECM connector. HINT: The correct waveform is shown in the left. IGF 0 msec./ Division A00 Check and replace ECM (See page IN ). 00 AV (M89U)
DI 5 6 Disconnect ignition coil with igniter connector and check voltage between terminals IGT IGT of ECM connector and body ground. IGT IGT IGT IGT (+) () A58 PEPAATION: (a) emove the glove compartment door (See page SF65 ). (b) Disconnect the ignition coil with igniter connector. Measure the voltage between terminals IGT IGT of the ECM connector and the body ground when the engine is cranked. : Voltage: More than 0. V and less than.5 V Check and replace ECM (See page IN ). 7 Check ignition coil with igniter power source circuit. BE665 A076 ON STAT () (+) A086 PEPAATION: Disconnect the ignition coil with igniter connector. Measure the voltage between terminal of the ignition coil with igniter connector and the body ground when the ignition switch is turned to ON and STAT position. : Voltage: 9 V epair ignition coil with igniter power source circuit. 8 Check for open and short in harness and connector between ignition switch and ignition coil with igniter (See page IN ). epair or replace harness or connector. 00 AV (M89U) 5
DI 6 eplace ignition coil with igniter. 00 AV (M89U) 6