For 1990-2009 cars

### Circuit Description

The Control Module will monitor actuator position voltage for correct feedback sequence during an actuator move.

An actuator position fault occurs when the actuator position feedback signal has not achieved and remained at the commanded actuator position within 6 seconds after the actuator has been activated. Actuator position faults result in deactivating the faulted actuators, storing error codes 23,24,25 or 26, and activating the driver select switch L.E.D.s . The system will continue to operate all nonfaulted actuators normally.

Recovery of the faulted actuators will occur after a successful one second self diagnostic test which is repeated every 3 minutes until all faults are cleared.

A mismatch of the commanded feedback signal and the actual feedback signal which occurs after the 6 seconds will not be detected as an error. The actuators will not be repositioned until the CCR system commands a new actuator position as a result of new speed/lateral accelerator switch inputs or a 3 minute retest.

### Conditions for Setting the DTC

A fault is detected if the actuator position feedback sequence is incorrect, or if more than 6 seconds is required to complete a move. If actuator position feedback voltage is incorrect, a code is set.

### Actions Taken When the DTC Sets

1. Record the actuator position error.
2. Turn on both of the driver select switch L.E.D.s.
3. Disable the faulted actuator.
4. Retest every 3 minutes.

### Diagnostic Aids

#### Notes on Intermittents

In extremely cold weather conditions (- 40° F), due to the decreased viscosity of the strut fluid, the actuator may not reach position within 6 seconds and set a code.

Also refer to Intermittents and Poor Connections .

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Perform the RTD Diagnostic System Check .
2. Turn the ignition OFF.
3. Disconnect the control module.
4. Measure the resistance between pins C14 and D9 of wiring harness connector.

Is the resistance between 0-2 ohms?

ohms

Go to Step 2

Go to Step 5

2 | Disconnect the strut connector and measure the resistance between pins C14 and D9 again. Is the resistance greater than 2 ohms? | ohms | Go to Step 3 | Go to Step 4
3 | Replace the strut. Refer to Strut Assembly Replacement . Is the replacement complete? | -- | Go to RTD Diagnostic System Check | --
4 | Repair short to ground in circuit 1014. Is the repair complete? | -- | Go to RTD Diagnostic System Check |
5 | Is the resistance between 3-19 ohms? | ohms | Go to Step 6 | Go to Step 9
6 | Check the strut connector for corrosion, moisture or foreign material. Is corrosion, moisture, or foreign material present? | -- | Go to Step 8 | Go to Step 7
7 | Replace the strut. Refer to Strut Assembly Replacement . Is the replacement complete? | -- | Go to RTD Diagnostic System Check | --
8 | Clean or repair as necessary. Is the repair complete? | -- | Go to RTD Diagnostic System Check | --
9 | Is the resistance between 20-60 ohms? | ohms | Go to Step 10 | Go to Step 12
10 |

1. Reconnect the control module.
2. Backprobe the control module connector with a digital voltmeter between pins C14 and D9.
3. Turn the ignition ON.

Does the voltage go high (B+) for approximately the first 2-6 seconds after the key is turned on?

Voltage

Go to Step 18

Go to Step 11

11 | Replace the control module. Refer to Electronic Suspension Control Module Replacement . Is the replacement complete? | -- | Go to RTD Diagnostic System Check | --
12 | Is the resistance greater than 60 ohms? | ohms | Go to Step 13 | --
13 | Check the resistance in circuit 1014 from the control module to the strut. Is the resistance greater than 2 ohms? | ohms | Go to Step 14 | Go to Step 15
14 | Repair the open in circuit 1014. Is the repair complete? | -- | Go to RTD Diagnostic System Check | --
15 | Check resistance in circuit 1017 from the control module to the strut. Is the resistance greater than 2 ohms? | ohms | Go to Step 16 | Go to Step 17
16 | Repair open in circuit 1017. Is the repair complete? | -- | Go to RTD Diagnostic System Check | --
17 | Replace the strut. Refer to Strut Assembly Replacement . Is the replacement complete? | -- | Go to RTD Diagnostic System Check | --
18 |

1. Install a 6.6 K ohms resistor between pins D2 and D16.
2. Measure the voltage between pins D3 and D9.

Is the voltage less than 0.5 volts with no fluctuation?

Voltage

Go to Step 21

Go to Step 19

19 | Is the voltage more than 0.5 volts, but less than 4.5 volts with no fluctuation? | Voltage | Go to Step 20 | Go to Step 23
20 | Replace the strut. Refer to Strut Assembly Replacement . Is the replacement complete? | -- | Go to RTD Diagnostic System Check | --
21 |

1. Turn the ignition OFF.
2. Measure the resistance between pins D3 and D9 of wiring harness connector.

Is the resistance greater than 100 ohms?

ohms

Go to Step 22

Go to Step 29

22 | Replace the control module. Refer to Electronic Suspension Control Module Replacement Is the replacement complete? | -- | Go to RTD Diagnostic System Check | --
23 | Is the voltage greater than 4.5 volts with no fluctuation? | -- | Go to Step 26 | Go to Step 24
24 | Does the voltage fluctuate between 1,3,and 5 volts? | Voltage | Go to Step 25 | Repeat this diagnosis chart
25 | Normal operation. Check for intermittents. Is an intermittent condition present? | -- | Go to Intermittents and Poor Connections | --
26 |

1. Disconnect the control module.
2. Check the resistance in circuit 1016 from the control module to the strut connector.

Is the resistance greater than 2 ohms?

ohms

Go to Step 27

Go to Step 28

27 | Repair the open in circuit 1016. Is the repair complete? | -- | Go to RTD Diagnostic System Check | --
28 | Replace the strut. Refer to Strut Assembly Replacement . Is the replacment complete? | -- | Go to RTD Diagnostic System Check | --
29 |

1. Disconnect the strut connector.
2. Measure the resistance between pins D3 and D9 of the wiring harness connector.

Is the resistance greater than 100 ohms?

ohms

Go to Step 30

Go to Step 31

30 | Replace the strut. Refer to Strut Assembly Replacement . Is the replacement complete? | -- | Go to RTD Diagnostic System Check | --
31 |

1. Disconnect the control module.
2. Measure the resistance between pins D3 and D9 of the control module connector.

Is the resistance greater than 20,000 ohms?

ohms

Go to Step 33

Go to Step 32

32 | Replace the control module. Refer to Electronic Suspension Control Module Replacement . Is the replacement complete? | -- | Go to RTD Diagnostic System Check | --
33 | Important: The control module connector and the strut connector must be disconnected. Measure the resistance between pin D3 and pin D9 of the wiring harness connector. Is the resistance greater than 100 ohms? | ohms | Go to Step 34 | Go to Step 35
34 | Repair short in circuit 1016 to ground. Is the repair complete? | -- | Go to RTD Diagnostic System Check | --
35 | Repair the short in circuit 1016 to 1017. Is the repair complete? | -- | Go to RTD Diagnostic System Check | --