1. DTC P1606 description
This diagnosis is performed on the microprocessor inside the TCM. If the TCM detects a control unit internal malfunction, the DTC is set.
2. Condition for setting DTC P1606
Any of the following conditions are met:
- The TCM detects a main CPU and sub-CPU malfunction.
- The TCM detects a program flow check malfunction.
3. Action taken when DTC P1606 sets
- The TCM flashes the check trans warning light. Refer to Action taken when DTC sets - Type C.
Refer to "55.Transmission Control 5A.Troubleshooting(AWR6B45) DTC type definitions".
4. Condition for clearing DTC P1606
- Refer to Condition for clearing the check trans warning light/DTC - Type C.
Refer to "55.Transmission Control 5A.Troubleshooting(AWR6B45) DTC type definitions".