Good job! A code 14 indicates a fault in the ignition spark circuit. Perticularly is focusses on the Ignitor which is a unit used to signal the Ignition Coil to fire the cylinders at the correct time. The Ignitor takes inputs from the engine computer module (ECM) to make the determination when to fire the coil. The signals the Ignitor sends and receives are call the IGF and IGT. The code is bascially saying that one or both of these siglas are missing when tested. The problem can be the Ignitor itself, the wiring between the ECM and the Ignitor, or even the ECM. The wiring rarely fails, and the ECM is likley to on extremely high milage vehicles. To correctly test the Ignitor and ECM you need access to a lab scope...instead it may be worth it to replace the Ignitor and see if the problem remains. But before anything...clear the code 14 by disconnecting the battery negative cable for 10-15 seocnds. Than reattatch it and drive the truck around to see if you can get the check engine lamp to come on before it dies...and read the codes again so we known it is defnitly 14 and that the ECM is not erroneously setting codes.
REMOVAL & INSTALLATION
See Figures 1, 2, 3 and 4
Igniters are mounted in one of two places on your Toyota truck. On the remotely mounted coils, the igniter is secured to the coil. On the integral coil vehicles (where the coil is in the distributor) the igniter is secured to the fenderwell.
- Disconnect the negative battery cable.
- Separate the wiring harness connections.
Fig. 1: The igniter can be found mounted on the remote ignition coil
- Unbolt the igniter.
Fig. 2: Unplug the connector and remove the retaining screws
- If mounted to the coil, loosen the nut holding the wire lead.
Fig. 3: If mounted to the coil, detach the wire
- Tag and disconnect the wire lead.
- Lift the igniter off its mount.
Fig. 4: Check that all the connections are separated, then lift the unit from the vehicleTo install:
- Mount the igniter to the bracket.
- Attach the wire lead to the coil if used.
- Connect the harness.
- Connect the negative battery cable.