Data Communications

DTC P0601-P0604, P0606, or P062F

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0601
- Control Module Read Only Memory Performance

DTC P0602
- Control Module Not Programmed

DTC P0603
- Control Module Long Term Memory Reset

DTC P0604
- Control Module Random Access Memory Performance

DTC P0606
- Control Module Processor Performance

DTC P062F
- Control Module Long Term Memory Performance

For symptom byte information, refer to Symptom Byte List Symptom Byte List.

Circuit/System Description

This diagnostic applies to internal microprocessor integrity conditions within the device. This diagnostic also addresses if the device is not programmed. The device monitors its ability to read and write to the memory. It also monitors a timing function. No external circuits are involved.

Conditions for Running the DTC

* Vehicle ON.

* The system voltage is greater than 9.5 V.

Conditions for Setting the DTC

The device detects an internal malfunction or incomplete programming.

Action Taken When the DTC Sets

* DTCs P0601, P0602, P0603, P0604, P0606, and P062F are Type A DTCs.

* The high voltage contactor relays may open.

Conditions for Clearing the DTC

DTCs P0601, P0602, P0603, P0604, P0606, and P062F are Type A DTCs.

Diagnostic Aids

* The DTC P0606 may set in Hybrid Powertrain Control Module 2 due to other faults. Do not replace the Hybrid Powertrain Control Module 2 until other DTCs are diagnosed first.

* The DTC P0606 can falsely set in Hybrid Powertrain Control Module 2 when the 12 V battery has been disconnected/re-connected or if the 12 V battery has been overcharged (over 18 V). In this case, do the following. If this DTC becomes history, use scan tool to clear this DTC. No further action is required:

- Vehicle OFF and all vehicle systems off. It may take up to 2 minutes for all vehicle systems to power down.

- Vehicle ON, verify that DTC P0606 is in history and contactors close. (If DTC P0606 remains current and contactors do not close, repeat the above step again).

- Use scan tool to clear the DTC to turn off the malfunction indicator lamp (MIL).

* If stored only as a history DTC and not retrieved as a current DTC, do not replace the device.

Reference Information

Schematic Reference

Data Communication Schematics [1][2]Electrical Diagrams

Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1

Description and Operation

Data Link Communications Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool References

Control Module References Programming and Relearning for scan tool information

Circuit/System Verification

Note: The DTC P0606 can falsely set in Hybrid Powertrain Control Module 2 when disconnecting the 12 V battery. See Diagnostic Aids section for more information.

1. Vehicle in Service Mode.

2. Verify DTC P0606 is not set.

• If DTC P0606 is set with other DTCs set
Diagnose all other DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

• If DTC P0606 is set without other DTCs set
Replace the device that set the DTC.

• If DTC P0606 is not set

3. Verify DTC P0602 is not set.

• If DTC P0602 is set

1. Program the device that set the DTC.

2. Verify the DTC does not set.

• If the DTC sets, replace the device that set the DTC.

• If the DTC does not set

3. All OK.

• If DTC P0602 is not set

4. Verify DTC P0601, P0603, P0604, or P062F is not set.

• If any of the DTCs are set
Replace the device that set the DTC.

• If none of the DTCs are set

5. All OK

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Programming and Relearning for device replacement, programming and setup