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
- Record the actuator position error.
- Turn on both of the driver select switch L.E.D.s.
- Disable the faulted actuator.
- 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 |
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 D13 and D10 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? | -- | -- | |
4 | Repair short to ground in circuit 1448. Is the repair complete? | -- | ||
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? | -- | -- | |
8 | Clean or repair as necessary. Is the repair complete? | -- | -- | |
9 | Is the resistance between 20-60 ohms? | ohms | Go to Step 10 | Go to Step 12 |
10 |
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? | -- | -- | |
12 | Is the resistance greater than 60 ohms? | ohms | Go to Step 13 | -- |
13 | Check the resistance in circuit 1448 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 1448. Is the repair complete? | -- | -- | |
15 | Check resistance in circuit 1005 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 1005. Is the repair complete? | -- | -- | |
17 | Replace the strut. Refer to Strut Assembly Replacement . Is the replacement complete? | -- | -- | |
18 |
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? | -- | -- | |
21 |
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? | -- | -- | |
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? | -- | -- | |
26 |
Is the resistance greater than 2 ohms? | ohms | Go to Step 27 | Go to Step 28 |
27 | Repair the open in circuit 1004. Is the repair complete? | -- | -- | |
28 | Replace the strut. Refer to Strut Assembly Replacement . Is the replacement complete? | -- | -- | |
29 |
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? | -- | -- | |
31 |
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? | -- | -- | |
33 |
Important: The control module connector and the strut connector must be disconnected. Measure the resistance between pin D6 and pin D10 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 1004 to ground. Is the repair complete? | -- | -- | |
35 | Repair the short in circuit 1004 to 1005. Is the repair complete? | -- | -- |
