TEST ACTION APPLICABILITY
6 Turn the ignition on.
With the DRBIIIt, read TPS VOLTS.
While monitoring the DRBIIIt, slowly open and close the Throttle.
Is the voltage change smooth?
All
Yes → Go To 7
No → Replace the Throttle Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
7 Turn the ignition on.
With the DRBIIIt, read Throttle Position voltage. Throttle must be against stop.
Is the voltage 0.92 or less with the Throttle closed?
All
Yes → Go To 8
No → Check for a binding throttle condition. If OK, replace the Throttle
Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
8 Note: For this test to be valid, the thermostat must be operating correctly.
Note: This test works best if performed on a cold engine (cold soaked).
NOTE: If the vehicle was allow to sit over night with no engine start, coolant
temperature should be near ambient temperatures.
Turn the ignition on.
With the DRBIIIt, read the Engine Coolant Temperature value.
Note: If engine coolant temperature is above 82° C (180° F), allow the engine
to cool until 65° C (150° F) is reached.
Start the engine.
During engine warm-up, monitor the Engine Coolant Temperature value. The
temperature value change should be a smooth transition from start up to normal
operating temp 82° C (180° F). The value should reach at least 82° C (180° F).
Did the Engine Temperature value increase smoothly and did it reach at least 82° C
(180° F)?
All
Yes → Go To 9
No → Replace the Engine Coolant Temperature Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
9 The following additional items should be checked as a possible cause for a start and
stall condition.
Refer to any Technical Service Bulletins (TSB’s) that may apply to the symptom.
Fuel must be free of contamination.
The exhaust system must be free of any restrictions.
The engine compression must be within specifications.
The engine valve timing must be within specifications.
The engine must be free from vacuum leaks.
The throttle body must be free of carbon buildup and dirt.
Do any of the above conditions exist?
All
Yes → Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
No → Test Complete.
336
STARTING
*START AND STALL CONDITION — Continued
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