Pinpoint Test C: The Cruise Control Switches Do Not Operate Correctly
Cruise Control
Pinpoint Tests
Pinpoint Test C: The Cruise Control Switches Do Not Operate Correctly
Refer to Wiring Diagram Set 31, Speed Control for schematic and connector information. Diagrams By Number
Normal Operation
A reference voltage is sent from the PCM to the steering wheel cruise control switches. When a switch is pressed, voltage is routed through a specific resistor value for each function. The PCM provides ground for the reference voltage to determine which control input function has been selected.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Clockspring
- PCM
- Cruise control switches
PINPOINT TEST C: THE CRUISE CONTROL SWITCHES DO NOT OPERATE CORRECTLY
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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C1 CHECK THE CRUISE CONTROL SWITCH
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: PCM DataLogger.
- Press each cruise control switch button while monitoring the cruise control switch PID (SCCS).
- Does the PID value agree with the switch position?
Yes
GO to C10.
No
If only one switch does not display the correct PID value, INSTALL a new cruise control switch. REFER to Cruise Control Switch Cruise Control Switch. CLEAR the DTCs. TEST the system for normal operation.
Otherwise, GO to C2.
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C2 CHECK THE CRUISE CONTROL SWITCH CIRCUITRY FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: PCM C175b (Gasoline) or C1232b (Diesel).
- Ignition ON.
- Turn the parking lamps on.
- For gasoline vehicles, measure the voltage between the PCM C175b-19, circuit VES10 (WH), harness side and ground; and between the PCM C175b-30, circuit RES08 (GN/BN), harness side and ground.
- For diesel vehicles, measure the voltage between the PCM C1232b-8, circuit VES10 (WH), harness side and ground; and between the PCM C1232b-17, circuit RES08 (GN/BN), harness side and ground.
- Is any voltage present?
Yes
TURN the parking lamps off. GO to C3.
No
TURN the parking lamps off. GO to C5.
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C3 CHECK THE CRUISE CONTROL SWITCH CIRCUITRY FOR A SHORT TO VOLTAGE WITH THE CLOCK SPRING DISCONNECTED
- Ignition OFF.
- Disconnect: Clockspring C218a.
- Ignition ON.
- For gasoline vehicles, measure the voltage between the PCM C175b-19, circuit VES10 (WH), harness side and ground; and between the PCM C175b-30, circuit RES08 (GN/BN), harness side and ground.
- For diesel vehicles, measure the voltage between the PCM C1232b-8, circuit VES10 (WH), harness side and ground; and between the PCM C1232b-17, circuit RES08 (GN/BN), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit in question. CLEAR the DTCs. TEST the system for normal operation.
No
GO to C4.
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C4 CHECK THE CLOCKSPRING FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Connect: Clockspring C218a.
- Remove the driver air bag module. Refer to Restraint Systems.
- Disconnect: Upper Clockspring C218b.
- WARNING: Prior to reinstalling a previously removed driver air bag module, make sure to correctly position the wire clip that retains the driver air bag module to the steering wheel. Failure to follow this instruction will result in incorrect installation of the driver air bag module and increases the risk of serious personal injury or death in a crash.
- Connect the battery.
- Ignition ON.
- Turn the parking lamps on.
- For gasoline vehicles, measure the voltage between the PCM C175b-19, circuit VES10 (WH), harness side and ground; and between the PCM C175b-30, circuit RES08 (GN/BN), harness side and ground.
- For diesel vehicles, measure the voltage between the PCM C1232b-8, circuit VES10 (WH), harness side and ground; and between the PCM C1232b-17, circuit RES08 (GN/BN), harness side and ground.
- Is any voltage present?
Yes
INSTALL a new clockspring. INSTALL the driver air bag module. REFER to Restraint Systems. CLEAR the DTCs. REPEAT the self-test.
No
GO to C9.
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C5 CHECK THE CRUISE CONTROL SWITCH CIRCUITRY FOR A SHORT TO GROUND
- Ignition OFF.
- Remove the driver air bag module. Refer to Restraint Systems.
- Disconnect: Upper Clockspring C218b.
- For gasoline vehicles, measure the resistance between the PCM C175b-19, circuit VES10 (WH), harness side and ground; and between the PCM C175b-30, circuit RES08 (GN/BN), harness side and ground.
- For diesel vehicles, measure the resistance between the PCM C1232b-8, circuit VES10 (WH), harness side and ground; and between the PCM C1232b-17, circuit RES08 (GN/BN), harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes
GO to C7.
No
GO to C6.
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C6 CHECK THE CLOCKSPRING FOR A SHORT TO GROUND
- Disconnect: Clockspring C218a.
- For gasoline vehicles, measure the resistance between the PCM C175b-19, circuit VES10 (WH), harness side and ground; and between the PCM C175b-30, circuit RES08 (GN/BN), harness side and ground.
- For diesel vehicles, measure the resistance between the PCM C1232b-8, circuit VES10 (WH), harness side and ground; and between the PCM C1232b-17, circuit RES08 (GN/BN), harness side and ground.
- Are the resistances greater than 10,000 ohms?
Yes
INSTALL a new clockspring. INSTALL the driver air bag module. REFER to Restraint Systems. CLEAR the DTCs. TEST the system for normal operation.
No
GO to C9.
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C7 CHECK THE CRUISE CONTROL CIRCUITRY FOR AN OPEN
- Disconnect: Clockspring C218a.
- For gasoline vehicles, measure the resistance between the PCM C175b-19, circuit VES10 (WH), harness side and the clockspring C218a-15, circuit VES10 (WH), harness side.
- For gasoline vehicles, measure the resistance between the PCM C175b-30, circuit RES08 (GN/BN), harness side and the clockspring C218a-14, circuit RES08 (GN/BN), harness side.
- For diesel vehicles, measure the resistance between the PCM C1232b-8, circuit VES10 (WH), harness side and the clockspring C218a-15, circuit VES10 (WH), harness side.
- For diesel vehicles, measure the resistance between the PCM C1232b-17, circuit RES08 (GN/BN), harness side and the clockspring C218a-14, circuit RES08 (GN/BN), harness side.
- Are the resistances less than 5 ohms?
Yes
GO to C8.
No
REPAIR the circuit in question. CLEAR the DTCs. TEST the system for normal operation.
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C8 CHECK THE CLOCKSPRING FOR AN OPEN
- Remove the driver air bag module. Refer to Restraint Systems.
- Disconnect: Upper Clockspring Connector.
- Measure the resistance between the clockspring C218 pin 14, component side and the upper clockspring pin 3, component side.
- Measure the resistance between the clockspring C218 pin 15, component side and the upper clockspring pin 2, component side.
- Are the resistances less than 5 ohms?
Yes
GO to C9.
No
INSTALL a new clockspring. INSTALL the driver air bag module. REFER to Restraint Systems. CLEAR the DTCs. TEST the system for normal operation.
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C9 CHECK THE CRUISE CONTROL SWITCH CIRCUITRY FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the clockspring, harness side and the steering wheel controls, harness side; and between the clockspring, harness side and ground as follows:
- Is the resistance less than 5 ohms between the clockspring and the steering wheel controls, and greater than 10,000 ohms between the clockspring and ground?
Yes
INSTALL a new cruise control switch. REFER to Cruise Control Switch Cruise Control Switch. INSTALL the driver air bag module. REFER to Restraint Systems. CLEAR the DTCs. TEST the system for normal operation.
No
INSTALL a new steering wheel. REFER to Steering Column. CLEAR the DTCs. TEST the system for normal operation.
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C10 CHECK FOR CORRECT PCM OPERATION
- Install the driver air bag module. Refer to Restraint Systems.
- Connect: All Disconnected Connectors.
- Disconnect all the PCM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the PCM connectors and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new PCM. REFER to Computers and Control Systems. INSTALL the driver air bag module. REFER to Restraint Systems. CLEAR the DTCs. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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