Step
| Action
| Value(s)
| Yes
| No
|
1
|
- Disconnect the auto level control air inflator relay connector
and the auto level control air compressor connector.
- Replace ELC fuse if it is blown.
- Using a test light, frontprobe the auto level control air compressor
harness connector from terminal A. terminal C, and terminal E to ground. Frontprobe
auto level control air inflator relay harness connector from terminal D
to ground.
Does the test light illuminate in all four checks?
| --
|
Go to Step 3
|
Go to Step 2
|
2
|
- Repair a short to ground in circuit 1240.
- Replace ELC fuse if necessary.
- Perform system check to verify fuse no longer shorts out under
same conditions.
Has the repair been made and the system rechecked?
| --
| System OK
| --
|
3
|
- Disconnect the auto level control air inflator relay and the auto
level control sensor harness connectors.
- Using a test light, backprobe from B+ to the auto level control
air inflator relay harness connector terminal B and terminal C.
Is the test light on?
| --
|
Go to Step 12
|
Go to Step 4
|
4
| Reconnect
the auto level control air compressor harness connector.
Is the ELC fuse blown?
| --
|
Go to Step 8
|
Go to Step 5
|
5
|
- Reconnect the auto level control air inflator relay, auto level
control sensor, and the auto level control air solenoid valve harness connectors.
- Replace ELC fuse if necessary.
- Load rear of passenger compartment with 181 kg (400 lbs),
enough to activate compressor.
- Turn vehicle ignition to Run and then to off.
- Listen closely to auto level control air compressor for 1 minute.
Is the ELC fuse OK and does the solenoid click after approximately 40
seconds.
| --
|
Go to Step
7
|
Go to Step
6
|
6
|
- Disconnect the auto level control air compressor harness connector.
- While listening closely to auto level control air inflator solenoid,
connect a 20 A fused jumper to the auto level control air compressor
harness connector from terminal B to ground and from B+ to terminal C.
Does solenoid click and are the fuses in jumpers OK?
| --
|
Go to Step 9
|
Go to Step 7
|
7
|
- Replace the auto level control air compressor head. Refer to
Automatic Level Control Air Compressor Head Replacement
.
- Reconnect the auto level control air compressor harness connector.
- Replace ELC fuse if necessary.
- Perform system check to verify fuse no longer blows under same
conditions. Refer to
Automatic Level Control System Operation Check
.
Is the ELC fuse blown?
| --
|
Go to Step 8
| System OK
|
8
|
- Replace auto level control air compressor. Refer to
Air Compressor Replacement
.
- Replace fuse if necessary.
- Perform system check to verify fuse no longer blows under same
conditions. Refer to
Automatic Level Control System Operation Check
.
Is the ELC fuse blown?
| --
|
Go to Step 9
| System OK
|
9
|
- Replace auto level control air inflator relay. Refer to
Automatic Level Control Relay Replacement
.
- Replace the ELC fuse if necessary.
- Perform system check to verify fuse no longer blows under same
conditions. Refer to
Automatic Level Control System Operation Check
.
Is the ELC fuse blown?
| --
|
Go to Step 11
| System OK
|
10
|
- Replace auto level control air compressor. Refer to
Air Compressor Replacement
.
- Replace the ELC fuse if necessary.
- Perform system check to verify fuse no longer blows under same
conditions. Refer to
Automatic Level Control System Operation Check
.
Is the ELC fuse blown?
| --
|
Go to Step 10
| System OK
|
11
|
- Replace auto level control sensor. Refer to
Automatic Level Control Sensor Link Replacement
.
- Replace the ELC fuse if necessary.
- Perform system check to verify fuse no longer blows under same
conditions. Refer to
Automatic Level Control System Operation Check
.
Is the ELC fuse blown?
| --
|
Go to Step 8
| System OK
|
12
|
- Replace auto level control air inflator solenoid valve.
- Replace the ELC fuse if necessary.
- Perform system check to verify fuse no longer blows under same
conditions. Refer to
Automatic Level Control System Operation Check
.
Is the ELC fuse blown?
| --
|
Go to Step 13
| System OK
|
13
| Check for a short to ground in circuit 1248.
Is there a short to ground in circuit 1248?
| --
|
Go to Step 14
|
Go to Step 15
|
14
| Repair a short to ground in either circuit 1248.
Has the repair been made and the system rechecked?
| --
| System OK
| --
|
15
| Check for a short to ground in
circuit 1249.
Is there a short to ground in circuit 1249?
| --
|
Go to Step 16
|
Go to Step 17
|
16
| Repair a short to ground in circuit 1249.
Has the repair been made and the system rechecked?
| --
| System OK
| --
|
17
| Check for a short to ground in
circuit 1240.
Is there a short to ground in circuit 1240?
| --
|
Go to Step 18
| System OK
|
18
| Repair a short to ground in circuit 1240.
Has the repair been made and the system rechecked?
| --
| System OK
| --
|
