Step
| Action
| Value(s)
| Yes
| No
|
1
| Did you
review the driver information system operation and perform the necessary inspections?
| --
| Go to
Step 2
| Go to
Symptoms - Driver Information System
|
2
| Verify that
the driver information display module temperature display always reads one
value.
Does the driver information system operate normally?
| --
| Go to
Testing for Intermittent Conditions and Poor Connections
in Wiring
Systems
| Go to
Step 3
|
3
| Did you test the vehicle for diagnostic trouble codes (DTCs)?
| --
| Go to
Step 4
| Go to
Powertrain On Board Diagnostic (OBD) System Check
in Engine Controls - 4.3L
|
4
| Do the speedometer and the odometer
operate correctly?
| --
| Go to
Step 5
| Go to
Speedometer Inaccurate or Inoperative
|
5
|
- Disconnect the ambient air temperature sensor connector.
- Connect a J 39200
.
- Measure the resistance across the ambient air temperature sensor
terminals at two different temperatures. Refer to
Circuit Testing
in Wiring Systems.
- Compare the readings to the specified measurements. Refer to
Sensor Resistance Table
.
Are the readings within specifications?
| --
| Go to
Step 7
| Go to
Step 6
|
6
| Replace the ambient air temperature sensor. Refer to
Ambient Air Temperature Sensor Replacement
Sensor Replacement - Outside Air Temperature.
Is the repair complete?
| --
| Go to
Step 10
| --
|
7
|
- Raise and support the vehicle. Refer to
Lifting and Jacking the Vehicle
in General Information.
- Disconnect the driver information display module connector.
- Using the J 35616
, connect a J 39200
digital multimeter (DMM) to driver information display module connector C1,
cavity 7 (CKT 817) and connector C1, cavity 6
(CKT 451). Connect the RED lead to cavity 7. Connect
the BLK lead to cavity 6. Refer to
Circuit Testing
in Wiring Systems.
- Set the J 39200
DMM to measure DC volts.
- Push the Hz button once on the J 39200
DMM. Hz should be displayed on the right side of the screen.
- Start the vehicle.
- Depress the brake pedal.
- Place the vehicle in a forward gear.
- Release the brake.
- Accelerate in order to maintain a constant speed of 25 mph.
(MPH x 1.111 = Hz)
Does the J 39200
DMM show a value within the specified range?
| 25-30 Hz
| Go to
Step 9
| Go to
Step 8
|
8
|
- Repair the open or high resistance in CKT 817 (DK GRN/WHT)
between the driver information display module connector C1, terminal 7
and the underhood fuse block C1, terminal F7. Refer to
Wiring Repairs
in Wiring Systems.
- Inspect the system.
Is the repair complete?
| --
| Go to
Step 10
| --
|
9
| Replace the driver information display module. Refer to
Driver Information Center Module Replacement
.
Is the repair complete?
| --
| Go to
Step 10
| --
|
10
| Operate the system in order to verify the repair.
Did you correct the condition?
| --
| System OK
| Go to
Step 3
|
