( TF09E1PE10436436021FAAT00 )
A/T Interlock System - Key Interlock System Circuit Troubleshooting
SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repairs or service.
  1. Turn the ignition switch to ACCESSORY (I). The shift lever must be in P.
  1. Disconnect the steering lock assembly connector.
  1. Check if the ignition switch can be turned to LOCK (0).
Can the ignition switch be turned to LOCK (0)?
YES -
Go to Step 4 .
NO -
  1. Turn the ignition switch to LOCK (0).
  1. Move the shift lever out of P.
  1. Check for continuity between steering lock assembly connector terminal No. 3 and body ground.
Is there continuity?
YES -
Repair short in the wire between key interlock solenoid and the MICU.■
NO -
Go to Step 7 .
  1. Connect the HDS to the DLC.
  1. Check the Park Pin Switch signal with the HDS in the A/T data list while the shift lever is in P, and when the shift lever is shifted to any position other than P.
Is the park pin switch signal OFF while the shift lever is in P, and ON when the shift lever is shifted out of P?
YES -
Go to Step 15 .
NO -
Go to Step 9 .
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the park pin switch 2P connector, and remove it from the shift lever bracket base.
  1. Check for continuity between park pin switch 2P connector terminal No. 1 and No. 2.
Is there no continuity while the shift lever is in P, and continuity when the shift lever is shifted out of P?
YES -
Go to Step 13 .
NO -
  1. Disconnect the shift lock solenoid/park pin switch/A/T gear position indicator panel light connector.
  1. Check for continuity between shift lock solenoid/park pin switch/A/T gear position indicator panel light connector terminal No. 4 and body ground.
Is there continuity?
YES -
Repair short in the wire between shift lock solenoid/park pin switch/A/T gear position indicator panel light connector terminal No. 4 and the MICU.■
NO -
There is short in the wires between shift lock solenoid/park pin switch/A/T gear position indicator panel light connector and the 2P connector. Replace the shift lock solenoid; the shift lock solenoid is combined with the park pin switch harness and the indicator panel light harness/socket, and supplied as an assembly.■
  1. Turn the ignition switch to LOCK (0).
  1. Turn the ignition switch to ON (II).
  1. Measure the voltage between under-dash fuse/relay box connector B (36P) terminal No. 31 and body ground.
Is there voltage?
YES -
Substitute a known-good MICU and recheck.■
NO -
Repair open or short in the wire between under-dash fuse/relay box connector B (36P) and the transmission range switch.■