GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Prizm 🢒 Body and Accessories 🢒 Cruise Control 🢒 DTC 034

Circuit Description

The cruise control module is controlled through the cruise control switch. When the CRUISE ON-OFF switch is pressed and released, it provides a momentary short to ground to terminal 11 of the cruise control module. The control portion of the cruise control switch provides various resistances to terminal 10 of the cruise control module.

Diagnostic Aids

Check for the following:

    • Faulty cruise control switch
    • Short to ground in the WHT/BLU or GRN/BLK wires between the cruise control module and the cruise control switch
    • Short to ground in the inflatable restraint steering wheel module coil
    • Faulty ground connection at G203 which is located behind the RH kick panel

An intermittent malfunction may be caused by a fault in thecruise control switch electrical circuit. Inspect the wiring harness and components for any of the following conditions:

    • Backed out terminals
    • Improper mating of terminals
    • Broken electrical connectors locks
    • Improperly formed or damaged terminals
    • Faulty terminal to wire connections
    • Physical damage to the wiring harness
    • A broken wire inside the insulation
    • Corrosion of electrical connections, splices, or terminals

Repair any electrical circuit faults that were found. Refer to Wiring Repairs in Wiring Systems.

Test Description

Number(s) below refer to the step number(s) on the diagnostic table.

  1. This step tests for a short to ground in the CRUISE ON-OFF circuit.

    2.

  2. This step tests for an open condition in the CRUISE ON-OFF circuit.

    3.

  3. This step tests for proper resistance in the RES/ACC circuit.

    4.

  4. This step tests for proper resistance in the CANCEL circuit.

    5.

  5. This step tests for proper resistance in the SET/COAST circuit.

Step

Action

Value(s)

Yes

No

Schematic Reference: Cruise Control Schematics

1

Did you perform the Diagnostic System Check - Cruise Control ?

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Go to Step 2

Go to Diagnostic System Check - Cruise Control

2

  1. Turn OFF the ignition.
  2. Make sure the cruise On-Off switch is in the Off position.
  3. Disconnect the cruise control module connector which is located next to the instrument panel compartment on the RH side of the instrument panel.
  4. Test for a ground condition between cavity 11 of the cruise control module connector and ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 12

Go to Step 3

3

  1. Operate the cruise On-Off switch to the On position and hold.
  2. Test for an open condition between cavity 11 of the cruise control module connector and ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 12

Go to Step 4

4

  1. Operate the cruise On-Off switch to the ON position and hold.
  2. Move the cruise control switch upward toward the RES/ACC position and hold.
  3. Measure the resistance between cavity 10 and cavity 11 of the cruise control module.

Is the resistance within the specified range?

65-75 ohms

Go to Step 5

Go to Step 9

5

  1. Operate the cruise On-Off switch to the ON position and hold.
  2. Move the cruise control switch downward toward the SET/COAST position and hold.
  3. Measure the resistance between cavity 10 and cavity 11 of the cruise control module connector.

Is the resistance within the specified range?

195-205 ohms

Go to Step 6

Go to Step 7

6

  1. Operate the cruise On-Off switch to the ON position and hold.
  2. Pull the cruise control switch toward the CANCEL position and hold.
  3. Measure the resistance between cavity 10 and cavity 11 of the cruise control module connector.

Is the resistance within the specified range?

415-425 ohms

Go to Step 8

Go to Step 7

7

Inspect for poor connections at the harness connector of 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 12

Go to Step 10

8

Inspect for poor connections at the harness connector of the cruise control 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 12

Go to Step 11

9

Repair the open in the mode signal circuit between cavity 10 and cavity 11 of the cruise control module connector. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 12

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10

Replace the cruise control switch. refer to Cruise Control Switch Replacement .

Did you complete the replacement?

--

Go to Step 12

--

11

Replace the cruise control module. Refer to Cruise Control Module Replacement .

Did you complete the replacement?

--

Go to Step 12

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12
  1. Turn OFF the ignition.
  2. Remove the STOP fuse.
  3. Remove the ECU-B fuse.
  4. Wait 30 seconds.
  5. Reinstall STOP and ECU-B fuses.
  6. Turn ON the ignition, with the engine OFF.
  7. Using the jumper, connect the DLC terminals Tc and E1.

Does the CRUISE indicator lamp flash the same trouble code?

--

System OK

Go to Step 2