Last Modified: 11-20-2023 |
6.11:8.1.0 |
Doc ID: RM1000000014TZM |
Model Year Start: 2018 |
Model: Camry |
Prod Date Range: [06/2017 - 08/2018] |
Title: A25A-FKS (ENGINE CONTROL): SFI SYSTEM: P26CA14; Engine Coolant Pump Circuit Short to Ground or Open; 2018 MY Camry [06/2017 - 08/2018] |
DTC
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P26CA14
|
Engine Coolant Pump Circuit Short to Ground or Open
|
DESCRIPTION
Refer to DTC P26CA12.
Click here
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
MIL
|
Memory
|
Note
|
P26CA14
|
Engine Coolant Pump Circuit Short to Ground or Open
|
The operation duty ratio (WPO) of the monitoring engine water pump assembly becomes a certain amount or less when engine water pump assembly operation command is output (1 trip detection logic).
|
-
Open or short in engine water pump assembly (water inlet housing) circuit
-
Engine water pump assembly (water inlet housing)
-
ECM
|
Comes on
|
DTC stored
|
-
SAE Code: P26CC
-
DTC for Mexico Models: Applies
|
Related Data List
DTC No.
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Data List
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P26CA14
|
-
Coolant Temperature
-
Electric Water Pump Target Speed
-
Electric Water Pump Speed
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MONITOR DESCRIPTION
The ECM outputs an operation duty signal (WPO) to steplessly control the speed of the engine water pump assembly. The ECM outputs an operation duty signal (WPO) to the engine water pump assembly and monitors the actual duty signal (WPO) being output. When the operation duty signal (WPO) is being output to the to the engine water pump assembly and the actual operation duty signal (WPO) is a certain value or less, the ECM detects a malfunction and stores a DTC.
MONITOR STRATEGY
Related DTCs
|
P26CC: Engine water pump circuit range check (Low voltage)
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Required Sensors/Components (Main)
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Engine water pump assembly
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Required Sensors/Components (Related)
|
-
|
Frequency of Operation
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Continuous
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Duration
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3 seconds
|
MIL Operation
|
Immediate
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Sequence of Operation
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None
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TYPICAL ENABLING CONDITIONS
All of the following conditions are met
|
-
|
Battery voltage
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8 V or higher
|
Ignition switch
|
ON
|
Time after ignition switch off to ON
|
0.5 seconds or more
|
Output duty cycle
|
30 to 85%
|
Starter
|
Off
|
Engine water pump circuit pulse input fail (P26CA)
|
Not detected
|
TYPICAL MALFUNCTION THRESHOLDS
Both of the following conditions are met
|
-
|
Engine water pump assembly output terminal voltage level
|
Low
|
Engine water pump assembly output signal
|
No signal
|
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
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Connect the Techstream to the DLC3.
-
Turn the ignition switch to ON.
-
Turn the Techstream on.
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Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
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Turn the ignition switch off and wait for at least 30 seconds.
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Turn the ignition switch to ON [A].
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Turn the Techstream on.
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Move the shift lever to P [B].
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Start the engine and maintain the engine speed at 2500 rpm or more for at least 40 seconds [C].
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Enter the following menus: Powertrain / Engine / Trouble Codes [D].
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Read the pending DTCs.
HINT:
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If a pending DTC is output, the system is malfunctioning.
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If a pending DTC is not output, perform the following procedure.
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Enter the following menus: Powertrain / Engine / Utility / All Readiness.
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Input the DTC: P26CA14.
-
Check the DTC judgment result.
Techstream Display
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Description
|
NORMAL
|
-
DTC judgment completed
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System normal
|
ABNORMAL
|
-
DTC judgment completed
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System abnormal
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INCOMPLETE
|
-
DTC judgment not completed
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Perform driving pattern after confirming DTC enabling conditions
|
WIRING DIAGRAM
Refer to DTC P26CA12.
Click here
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
1.
|
INSPECT ECM (INTERNAL CIRCUIT)
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*a
|
Front view of wire harness connector
(to Engine Water Pump Assembly (Water Inlet Housing))
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(a) Disconnect the engine water pump assembly (water inlet housing) connector.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Powertrain / Engine / Active Test / Activate the Electric Water Pump.
Powertrain > Engine > Active Test
Tester Display
|
Activate the Electric Water Pump
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(d) Measure the resistance according to the value(s) in the table below.
Standard:
Tester Connection
|
Condition
|
Specified Condition
|
C43-2 (SWP) - Body ground
|
Ignition switch ON, 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.
NG
|
|
|
2.
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CHECK HARNESS AND CONNECTOR (ENGINE WATER PUMP ASSEMBLY (WATER INLET HOUSING) - ECM)
|
(a) Disconnect the engine water pump assembly (water inlet housing) connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (except TMMK Made):
Tester Connection
|
Condition
|
Specified Condition
|
C43-2 (SWP) - C57-50 (WPO)
|
Always
|
Below 1 Ω
|
C43-2 (SWP) or C57-50 (WPO) - Body ground
|
Always
|
10 kΩ or higher
|
Standard Resistance (for TMMK Made):
Tester Connection
|
Condition
|
Specified Condition
|
C43-2 (SWP) - C100-50 (WPO)
|
Always
|
Below 1 Ω
|
C43-2 (SWP) or C100-50 (WPO) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
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|