LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 1997 >> RAV4 2D Utility, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Tests W/Codes >> Circuit Tests >> DTC P1300: IGNITOR Circuit Malfunction >> Diagnosis & Repair
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

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 at center rear of engine compartment. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair wiring as necessary. If circuit is okay, go to next step.
  3. Disconnect Black 5-pin ignitor connector. Access ECM behind glove box. Turn ignition on. Measure voltage between ground and terminal No. 3 (Blue/Yellow 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 IGT circuit (Black wire) between ECM and ignitor. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair wiring as necessary. If circuit is okay, go to next step.
  5. Access ECM behind bottom center of instrument panel, in front of console. Backprobing ECM connector, measure voltage between ground and terminal No. 20 (Black wire) at ECM E4 connector while cranking engine. If voltage is .1-4.5 volts, go to next step. If voltage is not .1-4.5 volts, replace ECM and retest.
  6. Disconnect Black 5-pin ignitor connector. Backprobing ECM connector, measure voltage between ground and terminal No. 20 (Black wire) at ECM E4 connector while cranking engine. If voltage is .1-4.5 volts, go to next step. If voltage is not .1-4.5 volts, replace ECM and retest.
  7. Turn ignition on. Measure voltage between ground and terminal No. 3 (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 SYSTEM in SYSTEM/COMPONENT TESTS article. Replace coil as necessary. If coil is okay, replace ignitor.
Fig 1: Identifying Ignitor Connector Terminals
G95I31375Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals