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Home >> Toyota >> 1997 >> Paseo 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Tests W/Codes >> Circuit Tests >> DTC P1300: IGNITOR Circuit Malfunction >> Diagnosis & Repair

Diagnosis & Repair

  1. Check for spark at misfiring cylinder. See IGNITION CHECKS in BASIC TESTING article. If spark is present, go to next step. If spark is not present, go to step 4).
  2. Check for open or short in IGF circuit between ECM and ignitor. Ignitor is located near brake master cylinder. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair wiring as necessary. If circuit is okay, go to next step.
  3. Disconnect 8-pin ignitor connector. Access ECM behind glove box. Turn ignition on. Measure voltage between ground and terminal No. 7 (Red/Blue wire) at ECM E4 connector. See Figure. If voltage is 4.5-5.5 volts, replace ignitor. If voltage is not 4.5-5.5 volts, replace ECM and retest.
  4. Check for open or short in IGT1 circuit (Gray wire) and IGT2 circuit (Blue/Yellow wire) between ECM and ignitor. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary. If circuit is okay, go to next step.
  5. Access ECM behind glove box. Backprobe ECM connector. Measure voltage between ground and terminals No. 1 (Gray wire) and No. 14 (Blue/Yellow wire) at ECM E4 connector while cranking engine. If both readings are .1-4.5 volts, go to next step. If any reading is not .1-4.5 volts, replace ECM and retest.
  6. Disconnect 8-pin ignitor connector. Backprobe ECM connector. Measure voltage between ground and terminals No. 1 (Gray wire) and No. 14 (Blue/Yellow wire) at ECM E4 connector while cranking engine. If both readings are .1-4.5 volts, go to next step. If any reading is not .1-4.5 volts, replace ECM and retest.
  7. Turn ignition on. Measure voltage between ground and terminal No. 7 (Black/White wire) at ignitor wiring harness connector. See Fig 1. If voltage is 9-14 volts, go to next step. If voltage is not 9-14 volts, check and repair ignitor power source circuit. See appropriate wiring diagram in WIRING DIAGRAMS article.
  8. Check for open or short circuit in wiring harness between ignition switch and ignition coil, and between ignition coil and ignitor. Repair wiring as necessary. If wiring harness is okay, go to next step.
  9. Check ignition coil. See IGNITION CHECKS in BASIC TESTING article. Replace coil as necessary. If coil is okay, replace ignitor.
Fig 1: Identifying Ignitor Connector Terminals
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