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Cruise Control System Pinpoint Test 1: Cruise Control Is Inoperative - No Flash Codes

NOTE:
  • It is important to use a voltage drop test on some of the tests where specified. Circuits may indicate a good voltage and continuity but may not be capable of carrying sufficient current.
CRUISE CONTROL IS INOPERATIVE - NO FLASH CODES - PINPOINT TEST REFERENCE

PINPOINT TEST 1 CRUISE CONTROL IS INOPERATIVE - NO FLASH CODES
STEP INSPECTION ACTION
1 CHECK THE VOLTAGE TO THE CRUISE CONTROL SERVO
  • Key in OFF position.
  • Disconnect: Cruise Control Servo 0120-101.
  • Key ON, engine OFF (KOEO).
  • Measure the voltage between the cruise control servo 0120-101 circuit Y/V, harness side and ground.
  • Is the voltage greater than 10 volts? 
 Yes Go to next step.
No Verify the smart junction box (SJB) fuse 20 (10A) is OK. If OK, repair the Y/V circuit. Repeat the self-test.
2 CHECK THE VOLTAGE DROP ON CIRCUIT V/Y
  • Key in OFF position.
  • Connect: Cruise Control Servo 120-101.
  • Key ON, engine OFF (KOEO).
  • Measure the voltage drop on the cruise control actuator 0120-101 circuit Y/V.
  • Is the voltage drop less than 0.2 volts? 
 Yes Go to next step.
No Repair the Y/V circuit the self-test.
3 CHECK CIRCUIT B/GY FOR AN OPEN
  • Key in OFF position.
  • Disconnect: Cruise Control Servo 0120-101.
  • Measure the resistance between the cruise control servo 0120-101 circuit B/GY, harness side and ground.
  • Is the resistance less than 5 ohms? 
 Yes Go to next step.
No Repair the B/GY circuit the self-test.
4 CHECK THE DEACTIVATOR SWITCH INPUT TO THE CRUISE CONTROL SERVO
  • Key ON, engine OFF (KOEO).
  • Measure the voltage between the cruise control servo 0120-101 circuit V/O, harness side and ground.
  • Is the voltage greater than 10 volts? 
 Yes Go to next step.
No Repair the V/O circuit the self-test.
5 CHECK CIRCUIT L/W FOR VOLTAGE
  • Key in OFF position.
  • Disconnect: Brake Pressure Switch (BPS) 0120-04.
  • Key ON, engine OFF (KOEO).
  • Measure the voltage between the BPS 0120-04 circuit L/W harness side and ground.
  • Is the voltage greater than 10 volts? 
 Yes Go to next step.
No Verify the SJB fuse 26 (2A) is OK. If OK, repair the L/W circuit, repeat the self test
6 CHECK THE VOLTAGE DROP ON THE L/W CIRCUIT
  • Key in OFF position.
  • Connect: BPS 0120-04.
  • Key ON, engine OFF (KOEO).
  • Measure the voltage drop on the BPS 0120-04 pin 1 circuit L/W.
  • Is the voltage drop less than 0.2 volts? 
 Yes Go to next step.
No Repair the L/W circuit. Repeat the self-test.
7 CHECK CIRCUIT V/O FOR AN OPEN
  • Key in OFF position.
  • Disconnect: BPS 0120-04.
  • Measure the resistance between the cruise control servo 0120-101 pin 9 circuit V/O, harness side and the BPS 0120-04 circuit V/O, harness side.
  • Is the resistance less than 5 ohms? 
 Yes Go to next step.
No Repair the V/O circuit. Repeat the self-test.
8 CHECK THE VOLTAGE DROP ON CIRCUIT V/O
  • Connect BPS 0120-04.
  • Connect: Cruise Control Servo 0120-101.
  • Key ON, engine OFF (KOEO).
  • Measure the voltage drop on the cruise control servo 0120-101 circuit V/O.
  • Is the voltage drop less than 0.2 volts? 
 Yes Go to next step.
No Repair the V/O circuit. Repeat the self-test.
9 CHECK THE CRUISE CONTROL SERVO CIRCUIT W FOR A SHORT TO GROUND
  • Key in OFF position.
  • Disconnect: Cruise Control Servo 0120-101.
  • Measure the resistance between the cruise control servo 0120-101 circuit W, harness side and ground.
  • Is the resistance greater than 10, 000 ohms? 
 Yes Go to next step.
No Go to step 11.
10 CHECK THE CRUISE CONTROL SWITCH SIGNALS
  • Measure the resistance between the cruise control servo 0120-101 pin 5 circuit W, harness side and the cruise control servo 0120-101 pin 6 circuit G/BR, harness side while pressing the cruise control switches. See table below.
  • Are the cruise control switch resistance values OK? 
 Yes Go to step 13.
No Go to next step.
11 CHECK THE AIR BAG SLIDING CONTACT FOR AN OPEN OR SHORT TO GROUND
  • Key in OFF position.
  • Disconnect: Air Bag Sliding Contact 0922-202.
  • Measure the resistance between the cruise control servo connector 0120-101 circuit W, harness side and the air bag sliding contact connector 0922-202 circuit W, and between the cruise control servo connector 0120-101 circuit G/BR, harness side and the air bag sliding contact connector 0922-101 circuit G/BR, harness side.
  • Measure the resistance between the cruise control servo 0120-101 circuit W, harness side and ground.
  • Are the resistances less than 5 ohms between the cruise control servo and the air bag sliding contact, and greater than 10, 000 ohms between the cruise control servo and ground? 
 Yes Go to next step.
No Repair the circuit. Repeat the self test.
12 CHECK THE CRUISE CONTROL SWITCHES
  • Disconnect: Cruise Control Switches.
  • Measure the resistance between the cruise control switches connector pin 2, component side and the cruise control switches connector pin 4, component side while pressing each of the switches. See table below.
  • Are the cruise control switches resistance values OK? 
 Yes Install a new air bag sliding contact. See CLOCKSPRING . Repeat the self-test.
No Install new cruise control switches. See CRUISE CONTROL SWITCH REMOVAL / INSTALLATION . Repeat the self-test.
13 CHECK THE CRUISE CONTROL ON SWITCH OPERATION
  • Key ON engine OFF (KOEO).
  • While pressing the cruise control ON switch, measure the voltage between the cruise control servo connector 0120-101 circuit W harness side and ground.
  • Is the voltage greater than 10 volts? 
 Yes Go to step 17.
No Go to next step.
14 CHECK FOR VOLTAGE AT THE CRUISE CONTROL SWITCH WIRING HARNESS
  • Key in OFF position.
  • Disconnect: Cruise Control Switch Wiring Harness.
  • Key ON engine OFF (KOEO).
  • Measure the voltage between the top of the air bag sliding contact pin 5, component side and ground.
  • Is the voltage greater than 10 volts? 
 Yes Install new cruise control switch. See CRUISE CONTROL SWITCH REMOVAL / INSTALLATION . Repeat the self-test.
No Go to next step.
15 CHECK THE AIR BAG SLIDING CONTACT
  • Key in OFF position.
  • Disconnect: Air Bag Sliding Contact 0922-202.
  • Key ON engine OFF (KOEO).
  • Measure the voltage between the air bag sliding contact connector 0922-202 circuit Y/R, harness side and ground.
  • Is the voltage greater than 10 volts? 
 Yes Install a new air bag sliding contact. See CLOCKSPRING . Repeat the self-test.
No Go to next step.
16 CHECK CIRCUIT Y/R FOR AN OPEN
  • Key in OFF position.
  • Disconnect: Smart Junction Box (SJB).
  • Measure the resistance between the air bag sliding contact connector 0922-202 circuit Y/R and the SJB connector 2280d circuit Y/R, harness side.
  • Is the resistance less than 5 ohms? 
 Yes Go to step 30.
No Repair the circuit. Repeat the self-test.
17 CHECK CIRCUIT W FOR VOLTAGE
  • Key ON engine OFF (KOEO).
  • Measure the voltage between the cruise control servo connector 0120-101 circuit W, harness side and ground.
  • Is any voltage indicated? 
 Yes Go to next step.
No Go to step 20.
18 CHECK FOR A STUCK CRUISE CONTROL SWITCH
  • Key in OFF position.
  • Disconnect: Cruise Control Switch Wiring Harness.
  • Key ON engine OFF (KOEO).
  • Measure the voltage between the cruise control servo connector 0120-101 circuit W, harness side and ground.
  • Is any voltage present? 
 Yes Go to next step.
No Install a new cruise control switch.
See CRUISE CONTROL SWITCH REMOVAL / INSTALLATION .
19 CHECK CIRCUIT W FOR SHORT TO VOLTAGE
  • Key in OFF position.
  • Disconnect: Air bag sliding contact 0922-202.
  • Key in ON position.
  • Measure the voltage between the cruise control servo connector 0120-101 circuit W, harness side and ground.
  • Is any voltage present? 
 Yes Repair circuit W. Repeat the self-test.
No Install a new air bag sliding contact. See CLOCKSPRING . Repeat the self-test.
20 CHECK THE STOPLAMPS FOR CORRECT OPERATION
  • Key in OFF position.
  • Check the stoplamps for correct operation by applying and releasing the brake pedal.
  • Do the stoplamps operate correctly? 
 Yes Go to next step.
No Diagnose and repair stoplamps. See SYMPTOM TROUBLESHOOTING CHART - STOPLAMPS .
21 CHECK THE STOPLAMP SWITCH CIRCUIT
NOTE:
  • Some vehicles equipped with an automatic transmission have wiring to the clutch pedal position (CPP) switch, with a jumper plug installed in the CPP connector 011 9-03. If the CPP switch wiring and the CPP connector are present, carry out the diagnostic steps for the CPP as directed.
  • Measure the resistance between the cruise control servo connector 0120-101, circuit BR/G, harness side and the cruise control servo connector 0120-101 circuit B/GY, harness side.
  • Is the resistance less than 5 ohms? 
 Yes Go to step 26.
No If equipped with a manual transmission, or an automatic transmission with CPP wiring, Go to step 24. Otherwise, Go to next step.
22 CHECK CIRCUIT BR/G FOR AN OPEN TO THE CPP SWITCH
  • Disconnect: CPP Switch 0119-03 or the jumper plug.
  • Measure the resistance between the CPP switch connector 0119-03 circuit BR/G harness side and ground.
  • Is the resistance less than 5 ohms? 
 Yes Go to next step.
No Go to step 24.
23 CHECK CIRCUIT BR/G FOR AN OPEN
  • Measure the resistance between the CPP switch connector 0119-03 circuit BR/G harness side and the cruise control servo connector 0120-101 circuit BR/G harness side.
  • Is the resistance less than 5 ohms? 
 Yes Install a new CPP. See CLUTCH PEDAL POSITION (CPP) SWITCH REMOVAL / INSTALLATION . Repeat the self-test.
No Repair the BR/G wire. Repeat the self-test.
24 CHECK CIRCUIT B/Y FOR AN OPEN
  • Disconnect: Stoplamp Switch 0918-01.
  • Measure the resistance between the stoplamp switch connector 0918-01 circuit B/Y, harness side and ground.
  • Is the resistance less than 5 ohms? 
 Yes Go to next step.
No Repair the B/Y wire. Repeat the self-test.
25 CHECK THE STOPLAMP SWITCH
  • Disconnect: Stoplamp Switch 0918-01.
  • Install a fused (5A) jumper wire between the stoplamp switch connector 0918-01 circuit BR/G, harness side and the stoplamp switch connector 0918-01 circuit B/Y, harness side.
  • Measure the resistance between the cruise control servo connector 0120-101 circuit BR/G, harness side and the cruise control servo connector 0120-101 circuit B/GY harness side.
  • Is the resistance less than 5 ohms? 
 Yes Install a new stoplamp switch. See STOPLAMP SWITCH . Repeat the self-test.
No Repair the stoplamp switch circuit. Repeat the self-test.
26 CHECK CIRCUIT V/O FOR AN OPEN
  • Key in OFF position.
  • Disconnect: PCM 0140-175b.
  • Measure the resistance between the cruise control servo connector 0120-101 circuit V/O, harness side and the PCM connector 0140-175b circuit V/O, harness side.
  • Is the resistance less than 5 ohms? 
 Yes Go to next step.
No Repair the V/O wire. Repeat the self-test.
27 CHECK THE VEHICLE SPEED SIGNAL VOLTAGE
CAUTION:
  • Make sure the vehicle is secured properly before attempting to place the transmission range selector in DRIVE or in 1st gear if equipped with a manual transmission.
  • Connect: BPP switch 0120-04.
  • Connect: PCM 0140-175b.
  • Jack up the drive wheels and chock the other wheels.
  • Key ON engine running (KOER).
    NOTE:
    • For vehicles equipped with a manual transmission, place the transmission in 1st gear.
  • Place the transmission in DRIVE (D) and with the engine at idle, allow the wheels to spin.
  • Measure and record the AC voltage between the cruise control servo connector 0120-101 circuit V/O, harness side and ground with the vehicle wheels spinning a minimum of 8 km/h (5 mph).
  • Apply the brakes until the drive wheels come to a stop. Place the transmission in PARK (P), fully engage the parking brake and turn the engine OFF.
  • Is the recorded AC voltage greater than 4.5 volts? 
 Yes Go to next step.
No Go to step 29.
28 CHECK THE VEHICLE SPEED SIGNAL FREQUENCY
CAUTION:
  • Make sure the vehicle is secured properly before attempting to place the transmission range selector in DRIVE or in 1st gear if equipped with a manual transmission.
  • Key ON engine running (KOER).
    NOTE:
    • For vehicles equipped with a manual transmission, place the transmission in 1st gear.
  • Place the transmission in DRIVE (D) and with the engine at idle, allow the wheels to spin.
  • Measure and record the frequency between the cruise control servo connector 0120-101 circuit V/O, harness side and ground with the vehicle wheels spinning a minimum of 8 km/h (5 mph).
  • Record the speedometer reading.
  • Apply the brakes until the drive wheels come to a stop. Place the transmission in PARK (P), fully engage the parking brake and turn the engine OFF.
  • Divide the frequency reading by 2.2 to get a mph result and compare this to the reading of the speedometer.
  • Does the frequency reading result match the speedometer reading? 
 Yes Install a new cruise control servo. See CRUISE CONTROL SERVO REMOVAL / INSTALLATION . Repeat the self-test.
No Go to next step.
29 CHECK FOR CORRECT PCM OPERATION
  • Disconnect: PCM 0140-175b.
  • Check for:
    • corrosion.
    • damaged pins.
    • pushed-out pins.
  • Connect the PCM connector and make sure it seats correctly.
  • Operate the system and verify the concern is still present.
  • Is the concern still present? 
 Yes Install a new PCM. See POWERTRAIN CONTROL MODULE (PCM) REMOVAL / INSTALLATION . Repeat the self-test.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
30 CHECK FOR CORRECT SJB OPERATION
  • Disconnect: SJB 2280d.
  • Check for:
    • corrosion.
    • damaged pins.
    • pushed-out pins.
  • Connect the SJB connector and make sure it seats correctly.
  • Operate the system and verify the concern is still present.
  • Is the concern still present? 
 Yes Install a new SJB. See SMART JUNCTION BOX (SJB) . Repeat the self-test.
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
RESISTANCE SPECIFICATIONS

Cruise Control Switch Resistance Value
COAST Between 114 and 126 ohms
SET/ACCEL Between 646 and 714 ohms
RESUME Between 2090 and 2310 ohms
OFF Less than 5 ohms
No switches pressed Greater than 10, 000
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