DTC P0597-14: Thermostat Heater Control Circuit Short to Ground or Open [08/2021 - ]: Procedure
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- CHECK TERMINAL VOLTAGE (POWER SOURCE OF WATER INLET WITH THERMOSTAT SUB-ASSEMBLY)
*a Front view of wire harness connector
(to Water Inlet with Thermostat Sub-assembly)- Disconnect the water inlet with thermostat sub-assembly connector.
- Turn the engine switch on (IG).
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition C25-1 (ETM+) - Body ground Engine switch on (IG) 11 to 14 V Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - WATER INLET WITH THERMOSTAT SUB-ASSEMBLY)
Result:
OK
See step 2
- INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY
- Inspect the water inlet with thermostat sub-assembly.
Refer to INSPECTION [06/2018 - ]
Result
Proceed to OK NG
Result:
NG
REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY. Refer to REMOVAL [08/2021 - ]
Result:
OK
See step 3
- Inspect the water inlet with thermostat sub-assembly.
- CHECK HARNESS AND CONNECTOR (WATER INLET WITH THERMOSTAT SUB-ASSEMBLY - ECM)
- Disconnect the water inlet with thermostat sub-assembly connector.
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition C25-2 (ETM-) - C32-64 (PTCR) Always Below 1 Ω C25-2 (ETM-) or C32-64 (PTCR) - Body ground and other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 4
- CLEAR DTC
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Clear the DTC.
Powertrain > Engine > Clear DTCs
- Turn the engine switch off and wait for at least 30 seconds.
Result
Proceed to NEXT
Result:
NEXT
See step 5
- CHECK WHETHER DTC OUTPUT RECURS (DTC P0597-14)
- Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
- Enter the following menus: Powertrain / Engine / Trouble Codes.
- Read the DTCs.
Powertrain > Engine > Trouble Codes
Result
Result Proceed to DTCs are not output A DTC P0597-14 is output B
Result:
A
CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS [06/2018 - ]
Result:
B
REPLACE ECM. Refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]