For 1990-2009 cars

### Circuit Description

This DTC is used to monitor the voltage level available to the cruise control module at terminal 9 (BLK/YEL wire).

### Diagnostic Aids

Check for the following:

• | Open or high resistance in the BLK/YEL wire.

• | Open, high resistance or low voltage in the power distribution to the ECU-IG fuse in junction block 2.

• | Open or high resistance in the WHT/BLK wire.

• | Open or high resistance in the ground distribution to splice pack 250/G203

• | Vehicle charging system for poor performance.

• | Faulty cruise control module.

An intermittent may be caused by a poor connection, rubbed through wire insulation or a wire broken inside the insulation. Inspect the following harness connectors for backed out terminals, improper mating, broken lock, improperly formed or damaged terminals or for poor terminal-to-wire connection before replacing the suspect component:

• | Cruise control module connector

• | Junction block 2 C4

• | Splice pack 250

• | Ignition switch

### Test Description

The number/description refers to the step in the diagnostic table.

1. This step tests the condition of the power feed circuit to the module.

2. This step tests for a faulty cruise control module

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Cruise Control Diagnostic System Check performed? | -- | Go to Step 2 | Go to Cruise Control System Check
2 |

1. Turn the ignition switch to the LOCK position.
2. Disconnect the cruise control module.
3. Measure the voltage between cavity 9 and chassis ground.

Is the voltage within the specified value?

0-10 V

Go to Step 3

Go to Step 5

3 |

1. Reconnect the cruise module connector.
2. Test drive the vehicle at approximately 80 km/h (50 mph).
3. Engage the cruise control and observe the performance for one minute.
4. Stop the vehicle and test for DTCs.

Does this DTC reset?

--

Go to Step 6

Go to Step 4

4 | Repair the high resistance open condition in the BLK/YEL wire to the module in cavity 9. Is the repair complete? | -- | Go to Cruise Control System Check | --
5 | Repair the short to voltage in the BLK/YEL wire to the module in cavity 9. Is the repair complete? | -- | Go to Cruise Control System Check | --
6 | Replace the cruise control module. Is the repair complete? | -- | Go to Cruise Control System Check | --