Chart C-17 Cruise Control System Check

Chart C-17 (1 Of 2):

Chart C-17 (2 Of 2):

Cruise Control Circuit:

CIRCUIT DESCRIPTION
Cruise control (C/C) operation is one of the functions which is Powertrain Control Module (PCM) controlled. The PCM receives input signals from the C/C engagement switches, the brake switch, the vehicle speed sensor, the Throttle Position (TP) sensor and the servo position sensor. The PCM processes these inputs and sends out a signal to the servo to open or close its Vent and Vac solenoid valves to control vehicle speed.

DIAGNOSTIC AIDS
An intermittent may be caused by a poor connection, rubbed through wire insulation or a wire broken inside the insulation.
Check For:

Poor Connection or Damaged Harness
Inspect PCM harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection and damaged harness.

If one or more of the following diagnostic trouble codes are stored, cruise may be disabled. Repair any diagnostic trouble codes before diagnosing the cruise control system.

DTC 16 System Voltage High or Low.*
DTC 21 TP sensor High.*
DTC 22 TP sensor Low. *
DTC 24 VSS Circuit. *
DTC 29 Transaxle Shift Problem.
DTC 60 Cruise Control Disabled - Transaxle Pressure Switch (Trans not in drive).
DTC 61 Cruise Vent Solenoid Circuit Problem.
DTC 62 Cruise Vacuum Solenoid Circuit Problem.
DTC 63 Cruise Control Set Speed/Vehicle Speed Difference (too high).
DTC 64 Cruise Control Disabled - Acceleration Rate Too High.
DTC 65 Cruise SPS Circuit Problem.
DTC 66 Cruise Control Engine RPM Too High.
DTC 67 Cruise Switch Problem.
DTC 68 Cruise System Problem (SPS indicates high).
DTC 69 Cruise Control Disabled - Traction Control Active.
DTC 90 TCC Brake Switch Circuit Problem.

* MIL ("Service Engine Soon") is turned "ON" when this diagnostic trouble code is detected.