Code No. P1602: Communication Malfunction (between Engine-A/T-ECU Main Processor and System LSI)


FUNCTION



  • Engine-A/T-ECU checks the communication status for abnormal conditions.

TROUBLE JUDGMENT


Check Condition
  • Ignition switch is in "ON" position.
Judgement Criterion
  • Engine-A/T-ECU detects an error in communication with the throttle actuator control module.

PROBABLE CAUSE



  • Failed engine-A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

  • Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?
Replace the engine-A/T-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).