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 power steering control module connector.
- Use the DMM to measure the resistance between terminal 1 of the
power steering control 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 circuits XM400 and/or XM88.
- Repair the open or the high resistance in circuits XM400 and/or
XM88.
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 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 11
|
Go to Step 10
|
10
|
- 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
| --
|
11
|
- Disconnect the inflatable restraint sensing and diagnostic and
seat belt pretensioner 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 13
|
Go to Step 12
|
12
|
- There is an internal failure within the inflatable restraint sensing
and diagnostic and seat belt pretensioner module that is pulling the circuit
to ground.
- 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
| --
|
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 electronic 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 heater and A/C control.
- 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 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
| --
|
19
|
- Disconnect the inflatable restraint sensing and diagnostic and
seat belt pretensioner 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 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 inflatable restraint sensing
and diagnostic and seat belt pretensioner module that is pulling the circuit
to B+.
- 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
| --
|
22
|
- Use the DMM to check for proper voltage and ground circuits to
the power steering control module.
- If the voltage and ground circuits are OK, 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
| --
|
23
|
- Connect all connectors and components that were disconnected.
- Connect the scan tool.
- Establish communication with the power steering control module.
Does the scan tool communicate with the power steering control module?
| --
| System
OK
|
Go to Step 1
|
