Step
| Action
| Value(s)
| Yes
| No
|
1
| Was the Data Link Connector (DLC) Diagnostic System Check performed?
| --
|
Go to Step 2
| Go to
Data Link Communications System Check
|
2
|
- Turn the ignition switch on.
- Attempt to turn on the radio.
Does the radio turn on?
| --
|
Go to Step
3
|
Go to Step 10
|
3
| Is the scan tool properly configured to interface with this vehicle?
| --
|
Go to Step 4
|
Go to Step 11
|
4
|
- Connect scan tool on a known good vehicle.
- Perform the DLC Diagnostic System Check on known good vehicle.
Refer to
Data Link Communications System Check
in Wiring Systems.
Does the scan tool communicate with the known good vehicle?
| --
|
Go to Step 5
|
Go to Step 11
|
5
|
- Turn the ignition switch off.
- Disconnect the radio electrical connector.
- Disconnect the CD player electrical connector (if equipped with
RPO U1S).
- Using a DMM, measure the resistance between the DLC terminal 14
and ground.
Is the resistance within the specified range?
| ∞
|
Go to Step 6
|
Go to Step
12
|
6
|
- Turn the ignition switch on.
- Using a DMM, measure the voltage between the DLC terminal 14
and ground.
Is the voltage within the specified range?
| Less than 2V
|
Go to Step 7
|
Go to Step
13
|
7
|
- If vehicle is not equipped with remote CD player, skip to
Step 8
.
- Using a DMM, measure the resistance between the DLC terminal 14
and the CD player harness connector terminal 10.
Is the resistance within the specified range?
| Less than 2ohms
|
Go to Step 8
|
Go to Step
14
|
8
| Using a DMM, measure the resistance between the DLC terminal 14
and the radio harness connector terminal E1.
Is the resistance within the specified range?
| Less than 2ohms
|
Go to Step 9
|
Go to Step
14
|
9
|
- Turn the ignition switch off.
- Reconnect the radio electrical connector.
- Reconnect the CD player electrical connector (if equipped with
RPO U1S).
- Reconnect scan tool to DLC.
- Turn the ignition switch on.
- Using scan tool, attempt to communicate with radio.
- Using scan tool, attempt to communicate with the CD player (if
equipped with RPO U1S).
Does scan tool communicate with the radio and the CD player?
| --
|
Go to Step 15
|
Go to Step 10
|
10
| Refer to
Diagnostic System Check - Radio/Audio System
in Entertainment
for further diagnosis and repair of the vehicle's audio system.
Is the action complete?
| --
|
Go to Step
16
| --
|
11
| Refer to the scan tool manufacturer and/or scan tool user's manual for
correct operation of the scan tool.
Is the action complete?
| --
|
Go to Step
16
| --
|
12
| Repair short to ground in circuit 835.
Is the repair complete?
| --
|
Go to Step
16
| --
|
13
| Repair short to B+ in circuit 835.
Is the repair complete?
| --
|
Go to Step
16
| --
|
14
| Repair poor connection or open in circuit 835.
Is the repair complete?
| --
|
Go to Step
16
| --
|
15
| Malfunction is not present at this time. Check the connection between
the scan tool and the DLC for poor terminal contact.
Is the action complete?
| --
|
Go to Step
16
| --
|
16
|
- Turn the ignition switch off.
- Reinstall connectors/components removed.
Is the action complete?
| --
| Go to
Data Link Communications System Check
| --
|
