W T E C I I I E L E C T R O N I C C O N T R O L S T R O U B L E S H O O T I N G M A N U A L
Main code 26 occurs when the ECU has not detected either a throttle source or an engine coolant source.
Code 26 00 means that the ECU has not detected the presence of engine throttle data or analog circuitry. For details
about or using Pro-Link® to select a throttle source, see WTEC III Pro-Link® Manual.
Code 26 11 means that the ECU has not detected the presence of engine coolant temperature data or analog
circuitry. For details about or using Pro-Link® to select an engine coolant temperature source, see WTEC III Pro-
Active Indicator Clearing Procedure
1. When code 26 00 is logged and an analog TPS is known to be installed, refer to code 21 XX for
troubleshooting steps. If a J1587 or J1939 throttle signal is used, refer to code 66 00 for trouble-
2. When code 26 11 is logged and if an analog engine coolant temperature sensor is being used, refer
to code 62 XX for troubleshooting steps. If a J1587 or J1939 engine coolant temperature signal is
being used, refer to code 66 00 for troubleshooting steps.
Throttle source not detected
Engine coolant source not detected
CODE 26 XX THROTTLE SOURCE/ENGINE COOLANT SOURCE