Step
| Action
| Value(s)
| Yes
| No
|
1
| Was the Data Link Connector System Check performed?
| --
|
Go to Step 2
| Go to
Data Link Communications System Check
.
|
2
| Attempt to establish communication
with the same system, same year, on a different vehicle.
Can communication be established?
| --
|
Go to Step
4
|
Go to Step 3
|
3
|
- The scan tool may be inoperative.
- Verify that the scan tool operates properly.
Does the scan tool operate properly?
| --
|
Go to Step 4
| Go to
Scan Tool Inoperative
.
|
4
|
- Disconnect the inflatable restraint sensing and diagnostic and
seat belt pretensioner module connector.
- Use the DMM to measure the resistance between terminal 12 of the
inflatable restraint sensing and diagnostic and seat belt pretensioner module
connector and terminal 12 of the data link connector.
Is the measured resistance within the specified value?
| Less than 5 ohms
|
Go to Step 6
|
Go to Step 5
|
5
|
- Locate an open or a high resistance in circuit XM10.
- Repair the open or the high resistance in circuit XM10.
Is the repair complete?
| --
|
Go to Step
23
| --
|
6
| Use the DMM to measure the resistance between terminal 12 of the data
link connector and a known good ground.
Is the measured resistance within the specified value?
| Less than 5 ohms
|
Go to Step 7
|
Go to Step 14
|
7
|
- Disconnect the electronic brake/traction control module.
- Use the DMM to measure the resistance between terminal 12 of the
data link connector and a known good ground.
Is the measured resistance within the specified value?
| Less than 5 ohms
|
Go to Step 9
|
Go to Step 8
|
8
|
- There is an internal failure within the electronic brake/traction
control module that is pulling the circuit to ground.
- Replace the electronic brake/traction control module. Refer to
Electronic Brake and Traction Control Module Replacement
in Antilock Brakes.
Is the replacement complete?
| --
|
Go to Step
23
| --
|
9
|
- Disconnect the power steering control module.
- Use the DMM to measure the resistance between terminal 12 of the
data link connector and a known good ground.
Is the measured resistance within the specified value?
| Less than 5 ohms
|
Go to Step 11
|
Go to Step 10
|
10
|
- There is an internal failure within the power steering control
module that is pulling the circuit to ground.
- Replace the power steering control module. Refer to
Power Steering Control Module Replacement
in Variable
Effort Sterring.
Is the replacement complete?
| --
|
Go to Step
23
| --
|
11
|
- Disconnect the heater and A/C control.
- Use the DMM to measure the resistance between terminal 12 of the
data link connector and a known good ground.
Is the measured resistance within the specified value?
| Less than 5 ohms
|
Go to Step 13
|
Go to Step 12
|
12
|
- There is an internal failure within the heater and A/C control
that is pulling the circuit to ground.
- Replace the heater and A/C control. Refer to
Control Assembly Replacement
in HVAC Systems.
Is the replacement complete?
| --
|
Go to Step
23
| --
|
13
| If all of the modules are disconnected and there is still a short to
ground, locate and repair a short to ground in the circuits.
Is the repair complete?
| --
|
Go to Step
23
| --
|
14
| Use the DMM to measure the voltage between terminal 12 of the data link
connector and a known good ground.
Is the measured voltage within the specified value?
| B+
|
Go to Step 15
|
Go to Step
22
|
15
|
- Disconnect the electric brake/traction control module.
- Use the DMM to measure the voltage between terminal 12 of the
data link connector and a known good ground.
Is the measured voltage within the specified value?
| B+
|
Go to Step 16
|
Go to Step
17
|
16
|
- There is an internal failure within the electronic brake/traction
control module that is pulling the circuit to B+.
- Replace the electronic brake/traction control module. Refer to
Electronic Brake and Traction Control Module Replacement
in Antilock Brakes.
Is the replacement complete?
| --
|
Go to Step
23
| --
|
17
|
- Disconnect the power steering control module.
- Use the DMM to measure the voltage between terminal 12 of the
data link connector and known good ground.
Is the measured voltage within the specified value?
| B+
|
Go to Step 18
|
Go to Step
19
|
18
|
- There is an internal failure within power steering control module
that is pulling the circuit to B+.
- Replace the power steering control module. Refer to
Power Steering Control Module Replacement
in Variable
Effort Steering.
Is the replacement complete?
| --
|
Go to Step
23
| --
|
19
|
- Disconnect the heater and A/C control.
- Use the DMM to measure the voltage between terminal 12 of the
data link connector and a known good ground.
Is the measured voltage within the specified value?
| B+
|
Go to Step 20
|
Go to Step
21
|
20
| If all of the modules are disconnected and there is still
a short to B+, locate and repair a short to B+ in the circuits.
Is the repair complete?
| --
|
Go to Step
23
| --
|
21
|
- There is an internal failure within the heater and A/C control
that is pulling the circuit to B+.
- Replace the heater and A/C control. Refer to
Control Assembly Replacement
in HVAC Systems.
Is the replacement complete?
| --
|
Go to Step
23
| --
|
22
|
- Use the DMM to check for proper voltage and ground circuits to
the inflatable restraint sensing and diagnostic and seat belt pretensioner
module.
- If the voltage and ground circuits are OK, replace the inflatable
restraint sensing and diagnostic and seat belt pretensioner module. Refer
to
Inflatable Restraint Sensing and Diagnostic and Seat Belt Pretensioner Module Replacement
in SIR.
Is the replacement complete?
| --
|
Go to Step
23
| --
|
23
|
- Connect all connectors and components that were disconnected.
- Connect the scan tool.
- Establish communication with the inflatable restraint sensing
and diagnostic and seat belt pretensioner module.
Does the scan tool communicate with the inflatable restraint sensing
and diagnostic and seat belt pretensioner module?
| --
| System OK
|
Go to Step 1
|
