ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
ENGINE TEMPERATURE SENSORS OPEN OR SHORT CIRCUIT TEST
N OT E
· Use this test to troubleshoot system only when there is active diagnostic code or when diagnostic code can eas-
ily be activated. This procedure covers open circuit diagnostic codes and short circuit diagnostic codes that
are associated with these sensors:
a. Coolant temperature sensor
b. Inlet manifold temperature sensor
· Troubleshooting procedures for diagnostic codes of each temperature sensor are identical. Temperature sen-
sors are sensors that have two terminals. Temperature sensors do not require supply voltage from ECM.
ECM connector J1/P1 terminal 34 is common connection for engine temperature sensors. Sensor common
connection is shared between all temperature sensors. Common line is connected to each sensor connector ter-
minal 2. Terminal 1 is sensor output. Signal voltage from terminal 1 of each sensor is supplied to appropriate
terminal at ECM Connector J1/P1.