Cruise Control Schematic Icons
Cruise Control Schematic Icons Icon Icon Definition CAUTION: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling Zone 3 . Failure to observe the correct procedure could cause deployment of the SIR components, personal injury or unnecessary SIR system repairs
Scheme 1
Scheme 2
| Callout | Component Name |
|---|---|
| 1 | Horn Switch Connector |
| 2 | Cruise Control Lever Connector (K34) |
| 3 | Steering Wheel Control Switch Assembly - Right (UK3) |
| 4 | Cruise Control Lever (K34) |
| 5 | S293 (UK3) |
| 6 | S297 (UK3) |
| 7 | Steering Wheel Ground |
| 8 | C279 Inflatable Restraint Steering Wheel Module Coil to Steering Wheel Harness |
| 9 | S295 (UK3) |
| 10 | Steering Wheel Control Switch Assembly - Left (UK3) |
Scheme 3
| Connector Part Information OEM: 50-57-9403 Service: See Catalog Description: 3-Way F Crimp Housing (BK) |
|---|
| Terminal Part Information Terminal: Not Serviced in Kit Core/Insulation Crimp: N/A Release Tool/Test Probe: N/A |
Cruise Control Connector End Views
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| 1 | GY | 1884 | Cruise Control Switch Signal |
| 2 | PK | 1539 | Ignition 1 Voltage |
| 3 | L-GN | 696 | Cruise Control Cancel Signal |
Cruise Control Lever
Test Description
The numbers below refer to the step numbers located in the diagnostic table.
- 2: This step is performed in order to confirm that DTC P0703 is current within the PCM/ECM.
- 3: This step is performed in order to correct a BPP sensor that must be calibrated, possibly due to a BCM replacement or for a BPP sensor that is out of adjustment.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Cruise Control Schematics Connector End View Reference: Cruise Control Connector End Views or to Computer/Integrating Systems Connector End Views | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Is DTC P0703 current in the powertrain control module (PCM)/engine control module (ECM)? | Go to Step 3 | Go to Diagnostic Aids |
| 3 | Perform the brake pedal position (BPP) sensor calibration procedure. Refer to Brake Pedal Position Sensor Calibration . Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC. Does the DTC reset? | Go to Step 4 | System OK |
| 4 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 6 | Go to Step 5 |
| 5 | Replace the BCM. Refer to Control Module References for replacement, setup and programming. Did you complete the replacement? | Go to Step 6 | |
| 6 | Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC. Does the DTC reset? | Go to Step 2 | System OK |
DTC P0703
The number below refers to the step number on the diagnostic path.
- 26: DTCs will set in the PCM when you perform this diagnostic table.
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Cruise Control Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | ||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | |
| 2 | Is DTC P0573 current in the powertrain control module (PCM)? | Go to DTC P0573 in Lighting Systems | Go to Step 3 | |
| 3 | Install a scan tool. Turn ON the ignition, with the engine OFF. Turn the cruise control On/Off switch OFF. With the scan tool, observe the following cruise control parameters in the Body and Accessories Cruise Control data list: Cruise On/Off Switch Cruise Resume/Accel Switch Cruise Set/Coast Switch Do any of the parameters listed above display On? | Go to Step 13 | Go to Step 4 | |
| 4 | With the scan tool, observe the Cruise On/Off Switch parameter. Turn the cruise On/Off switch ON. Does the Cruise On/Off Switch parameter display On? | Go to Step 5 | Go to Step 9 | |
| 5 | With the scan tool, observe the Cruise Set/Coast Switch parameter. Press and hold the Set/Coast switch. Does the Cruise Set/Coast Switch parameter display On? | Go to Step 6 | Go to Step 11 | |
| 6 | With the scan tool, observe the Cruise Resume/Accel Switch parameter. Press and hold the Resume/Accel switch. Does the Cruise Resume/Accel Switch parameter display On? | Go to Step 7 | Go to Step 11 | |
| 7 | Turn OFF the ignition. Disconnect C3 at the body control module (BCM). Turn ON the ignition, with the engine OFF. With a DMM, measure the voltage of the cruise control cancel signal circuit. Does the voltage measure at or greater than the specified voltage? | 0.5 V | Go to Step 19 | Go to Step 8 |
| 8 | Activate and hold the cruise control cancel switch. With a DMM, measure the voltage of the cruise control cancel signal circuit. Does the voltage measure at the specified voltage? | B+ | Go to Step 12 | Go to Step 20 |
| 9 | Turn OFF the ignition. Remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement in SIR. Disconnect C6. Turn ON the ignition, with the engine OFF. Connect a test lamp between the ignition 1 voltage circuit and a good ground. Does the test lamp illuminate? | Go to Step 10 | Go to Step 22 | |
| 10 | IMPORTANT: The cruise control on/off switch must be turned ON in order to correctly view the Cancel switch, set/coast switch and the resume/accel switch resistance values with the DMM. With a DMM, measure the resistance of the cruise control switch between the ignition 1 voltage circuit and the cruise control set/coast and resume/accelerate switch signal circuit at the cruise control switch. Individually activate and hold the cruise control function switches while measuring the resistance of the cruise control function switches. Do the cruise control function switch resistance values measure between the specified values? | Off = O.L. On = 7.8 K-8.6 K ohms Resume = 2.7 K-3.0 K ohms Set = 1.2 K-1.3 K ohms Cancel = 0-1 K ohms | Go to Step 15 | Go to Step 16 |
| 11 | IMPORTANT: The cruise control on/off switch must be turned ON in order to correctly view the Cancel switch, set/coast switch and the resume/accel switch resistance values with the DMM. Turn OFF the ignition. Remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement in SIR. Disconnect C6. With a DMM, measure the resistance of the cruise control switch between the ignition 1 voltage circuit and the cruise control set/coast and resume/accelerate switch signal circuit at the cruise control switch. Individually activate and hold the cruise control function switches while measuring the resistance of the cruise control function switches. Do the cruise control function switch resistance values measure between the specified values? | Off = O.L. On = 7.8 K-8.6 K ohms Resume = 2.7 K-3.0 K ohms Set = 1.2 K-1.3 K ohms Cancel = 0-1 K ohms | Go to Step 15 | Go to Step 16 |
| 12 | Turn OFF the ignition. Connect C3 at the BCM. Disconnect the throttle actuator control (TAC) module. Turn ON the ignition, with the engine OFF. With a DMM, measure the voltage of the stop lamp switch signal circuit. Does the voltage measure greater than the specified value? | 8.5 V | Go to Step 18 | Go to Step 21 |
| 13 | Turn OFF the ignition. Remove the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement in SIR. Disconnect C6. Turn ON the ignition, with the engine OFF. With the scan tool, observe the following cruise control parameters: Cruise On/Off Switch Cruise Resume/Accel Switch Cruise Set/Coast Switch Do any of the parameters listed above display On? | Go to Step 14 | Go to Step 16 | |
| 14 | Test the cruise control set/coast and resume/accel switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 17 | |
| 15 | Test the cruise control Set/Coast and Resume/Accel switch signal circuit for the following: Short to ground Open High Resistance Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 17 | |
| 16 | Inspect for poor connections at the harness connector of the cruise control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 23 | |
| 17 | Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 25 | |
| 18 | Inspect for poor connections at the harness connector of the TAC module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 26 | Go to Step 24 | |
| 19 | Repair the short to voltage in the cruise control cancel signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 26 | ||
| 20 | Repair the following in the cruise control cancel signal circuit: Short to ground Open High Resistance Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 26 | ||
| 21 | Repair the open or the high resistance in the stop lamp switch signal circuit between the underhood fuse block and the TAC module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 26 | ||
| 22 | Repair the open, the short to ground or the high resistance in the ignition 1 voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 26 | ||
| 23 | Replace the cruise control switch. Refer to Cruise Control Switch Replacement . Did you complete the replacement? | Go to Step 26 | ||
| 24 | Replace the TAC module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 26 | ||
| 25 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 26 | ||
| 26 | Install the inflatable restraint steering wheel module. Refer to Inflatable Restraint Steering Wheel Module Replacement in SIR. Enable the inflatable restraint steering wheel module. Refer to SIR Disabling and Enabling Zone 3 in SIR. Use the scan tool in order to clear the PCM DTCs. Operate the cruise control system in order to verify the repair. Does the cruise control system operate properly? | System OK | Go to Step 2 | |
| IMPORTANT |
|---|
| The cruise control on/off switch must be turned ON in order to correctly view the Cancel switch, set/coast switch and the resume/accel switch resistance values with the DMM. |
| IMPORTANT |
|---|
| The cruise control on/off switch must be turned ON in order to correctly view the Cancel switch, set/coast switch and the resume/accel switch resistance values with the DMM. |
Cruise Control Inoperative/Malfunctioning
Cruise Control Description and Operation (3.5L)
Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions at speeds above 40 km/h (25 mph). Steep grades may cause variations in the selected vehicle speeds.
The following are the main components of the cruise control system
- The accelerator pedal
- The brake pedal position (BPP) sensor
- The body control module (BCM)
- The CANCEL switch
- The instrument panel cluster (IPC)
- The ON/OFF switch
- The powertrain control module (PCM)
- The RES/+ switch
- The SET/- switch
- The throttle actuator control (TAC) module
- The TAC motor
- The vehicle speed sensor (VSS)
Cruise Control Description and Operation (3.9L)
Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions at speeds above 40 km/h (25 mph). Steep grades may cause variations in the selected vehicle speeds.
The following are the main components of the cruise control system
- The accelerator pedal
- The brake pedal position (BPP) sensor
- The body control module (BCM)
- The CANCEL switch
- The instrument panel cluster (IPC)
- The ON/OFF switch
- The engine control module (ECM)
- The RES/+ switch
- The SET/- switch
- The throttle actuator control (TAC) module
- The TAC motor
- The vehicle speed sensor (VSS)
See also:
• Master Electrical Component List