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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Engine Control System Self-Diagnostics) >> Diagnostic Tests >> DTC P1320: IGNITOR No. 5 Circuit >> Diagnosis & Repair

Diagnosis & Repair

WARNING: This page is about a different car, the 2002 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check for spark at cylinder No. 5 by performing spark test. See SPARK TEST under IGNITION SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article. Cylinder No. 5 is third cylinder back from timing belt end of engine on firewall side of engine and uses the ignition coil No. 5. If spark exists, go to next step. If spark does not exist, go to step  4.
  2. Check for open and short in Black and Blue/White wires and electrical connectors between ECM and ignition coil No. 5. See WIRING DIAGRAMS article. ECM is located at passenger's side of instrument panel, just below glove box. See Figure. If wiring harness and electrical connectors are okay, go to next step. If wiring harness or electrical connector is defective, repair as necessary.
  3. Disconnect electrical connector at ignition coil No. 5. Remove glove box for access to ECM with electrical connectors still installed on ECM. See Figure. Turn ignition on. Using voltmeter, check voltage between body ground and terminal No. 25 (Black wire) at ECM electrical connector E12. See Figure. This is the IGF terminal on ECM. Voltage should 4.5-5.5 volts. If voltage is within specification, replace ignition coil No. 5. If voltage is not within specification, replace ECM.
  4. Check for open and short in Blue/White wire and electrical connectors between ECM and ignition coil No. 5. See WIRING DIAGRAMS article. ECM is located at passenger's side of instrument panel, just below glove box. See Figure. If wiring harness and electrical connectors are okay, go to next step. If wiring harness or electrical connector is defective, repair as necessary.
  5. Remove glove box for access to ECM with electrical connectors still installed on ECM. See Figure. Using voltmeter, check voltage between body ground and terminal No. 15 (Blue/White wire) at ECM electrical connector E12 while cranking engine. See Figure. This is the IGT5 terminal on ECM. Voltage should be more than .1 volt and less than 4.5 volts. If voltage is not within specification, go to next step. If voltage is within specification, go to step  7.
  6. Disconnect electrical connector at ignition coil No. 5. Using voltmeter, check voltage between body ground and terminal No. 15 (Blue/White wire) at ECM electrical connector E12 while cranking engine. See Figure. Voltage should be more than .1 volt and less than 4.5 volts. If voltage is within specification, replace ignition coil No. 5. If voltage is not within specification, replace ECM.
  7. Using voltmeter, check voltage between body ground and terminal No. 1 (Black/White wire) at electrical connector for ignition coil No. 5 with ignition switch in ON and START positions. See Figure. Voltage should be 9-14 volts. If voltage is within specification, go to next step. If voltage is not within specification, check power supply circuit between ignition switch and ignition coil No. 5. See WIRING DIAGRAMS article. If necessary to check AM2 fuse (30-amp), AM2 fuse is located in fuse/relay box at driver's side front corner of engine compartment. If AM2 fuse is defective, replace fuse and check for short in wiring harness and components connected to AM2 fuse. See WIRING DIAGRAMS article. Repair wiring harness or electrical connectors as necessary.
  8. Check for open in White/Black wire and electrical connectors between ground and ignition coil No. 5. See WIRING DIAGRAMS article. If wiring harness and electrical connectors are okay, replace ignition coil No. 5. If wiring harness or electrical connector is defective, repair as necessary.
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