DTC P26CA-14: Engine Coolant Pump Circuit Short to Ground or Open [08/2023 - ]: Procedure

Pre-procedure1

• Disconnect the engine water pump assembly (water inlet housing) connector.

• Perform the Active Test using the GTS.

  Powertrain > Engine > Active Test 

  Tester Display
  Activate the Electric Water Pump

• Measure the resistance according to the value(s) in the table below.

  Standard

  Tester Connection	Condition	Specified Condition
  B77-2 (SWP) - Body ground	During Active Test	Resistance fluctuates*

  HINT: 

  • *: Using the Active Test, duty control of the transistors in the ECM will be performed. Due to the duty control, resistance of the SWP terminal will be unstable during the Active Test. If the resistance fluctuates while performing the Active Test, it can be determined that the transistor is operating. If the transistor does not operate during the Active Test, the ECM may be malfunctioning.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

REPLACE ENGINE WATER PUMP ASSEMBLY (WATER INLET HOUSING). Refer to  REMOVAL [10/2022 - ] 

Result: 

NG 

See step  2

Pre-procedure1

• Disconnect the engine water pump assembly (water inlet housing) connector.

• Disconnect the ECM connector.
• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  B77-2 (SWP) - B28-50 (WPO)	Always	Below 1 Ω	Ω
  B77-2 (SWP) or B28-50 (WPO) - Body ground	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None.

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [08/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR