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Throttle / Pedal Position Sensor / Switch C Circuit Intermittent

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Throttle / Pedal Position Sensor / Switch C Circuit High

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Throttle / Pedal Position Sensor / Switch C Circuit Low

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Throttle / Pedal Position Sensor / Switch C Circuit Range / Performance

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Technical Definition:

Throttle / Pedal Position Sensor / Switch C Circuit

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Technical Definition:

Throttle / Pedal Position Sensor / Switch B Circuit Intermittent

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Technical Definition:

Throttle / Pedal Position Sensor / Switch B Circuit High

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Technical Definition:

Throttle / Pedal Position Sensor / Switch B Circuit Low

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Throttle / Pedal Position Sensor / Switch B Circuit Range / Performance

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Throttle / Pedal Position Sensor / Switch B Circuit

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Engine Overspeed Condition

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Engine Overspeed Condition

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– Wheel slippage (water, ice, mud, and snow)
– Excessive engine RPM in NEUTRAL or operated in the wrong transmission gear.

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Transmission Fluid Over Temperature Condition

Technical Description:

Possible Causes:

• Overheating due to towing overloaded trailer
• Transmission cooler or lines restricted
• Restriction/debris in transmission cooler
• Low transmission fluid
• Inoperative cooling fan/fan clutch
• Missing or damaged front air dam/spoiler
• Bad transmission fluid temperature sensor

Possible Symptoms:

• Vehicle transmission/transaxle won’t engage
• Leaking fluid out of torque converter seal or other location
• Low fluid in transmission/transaxle

Transmission Over Temperature Condition

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– Low transmission fluid level
– Transmission cooling system concerns

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Engine Coolant Over Temperature Condition

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Possible Causes:

• Low coolant due to leak in cooling system
• Restriction/debris in the A/C condenser or radiator
• Restriction/debris in the cooling system
• Thermostat stuck closed or faulty
• Inoperative cooling fan(s)
• Cylinder head gasket leaking combustion into cooling system
• Overloaded trailer towing
• Faulty water pump (impeller broken/damaged)

Possible Symptoms:

• MIL (malfunction indicator lamp) illumination
• Loss of power
• Coolant expelled from reservoir or radiator
• Low coolant
• Acrid smell of coolant due to leak
• Air conditioner inoperative (In the event of an overheat condition, the PCM (powertrain control module) on some vehicles shuts down the A/C system to reduce load on the engine).

Engine Overheat Condition

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Tech Notes:

– Faulty cooling fan
– Faulty Thermostat
– Faulty engine temperature sensor
– Cooling fan harness is open or shorted
– Cooling fan poor electrical connection
– Engine temperature sensor harness is open or shorted
– Engine temperature sensor poor electrical connection
– Improper ignition timing
– Blocked radiator

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Technical Definition:

Injector / Injection Timing Control Circuit

Technical Description:

Possible Causes:

• A plugged diesel fuel filter
• An in-tank blockage
• Air in the fuel due to a cracked in-tank fuel ine above the fuel level
• Bad transfer (lift) pump
• Injection pump out of time

Possible Symptoms:

• Low power
• Crank, but no start
• Hard start
• Displays an intermittent stumble or miss
• Engine may start and then stall
• Engine may appear to drive fine but surge at idle

Injection Timing Control Circuit Malfunction

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Tech Notes:

– Fuel Injection Pump Gear Alignment
– Fuel Filter Restriction
– Transfer Pump Inlet Restriction
– Faulty Fuel Injection Pump

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