Step
| Action
| Value(s)
| Yes
| No
|
1
|
- Disconnect the instrument cluster head-up display (HUD) harness
connector.
- Disconnect the HUD dimmer switch harness connector.
- Turn the ignition switch to the RUN position.
- Use a J 39200
digital
multimeter (DMM) in order to measure the voltage between the instrument cluster
HUD dimmer switch harness connector terminal E and ground.
Is any voltage present on CKT 621?
| --
| Go to
Step 3
| Go to
Step 2
|
2
| Inspect CKT 621 for a short to ground.
Does a short to ground exist in CKT 621?
| --
| Go to
Step 3
| Go to
Step 4
|
3
|
- Repair the short to B+ or the short to ground in CKT 621.
- Inspect the system.
Is the repair complete?
| --
| System OK
| --
|
4
| Use a J 39200
digital multimeter (DMM) in order to measure the voltage between the
instrument cluster HUD dimmer switch harness connector terminal H and ground.
Is any voltage present on CKT 620?
| --
| Go to
Step 6
| Go to
Step 7
|
5
| Inspect CKT 620 for a short to ground.
Does a short to ground exist in CKT 620?
| --
| Go to
Step 6
| Go to
Step 7
|
6
|
- Repair the short to B+ or the short to ground in CKT 620.
- Inspect the system.
Is the repair complete?
| --
| System OK
| --
|
7
| Use a J 39200
digital multimeter (DMM) order to measure the resistance between the
instrument cluster HUD dimmer switch harness connector terminal G and ground.
Is the measured resistance to ground within the specified value?
| 0-3 ohms
| Go to
Step 9
| Go to
Step 8
|
8
|
- Repair CKT 1550 for an open or a poor connection between
the instrument cluster HUD dimmer switch harness connector and G200.
- Inspect the system.
Is the repair complete?
| --
| System OK
| --
|
9
| Use a J 39200
digital multimeter (DMM) in order to measure the voltage between the
instrument cluster HUD dimmer switch harness connector terminal A and ground.
Is the measured voltage within the specified value?
| 9-14 V
| Go to
Step 11
| Go to
Step 10
|
10
|
- Repair the open or the poor connection in CKT 39 between
the instrument panel cluster HUD dimmer switch and the fuse block I/P IGN
fuse.
- Inspect the system.
Is the repair complete?
| --
| System OK
| --
|
11
|
- Reconnect the instrument cluster HUD dimmer switch harness connector.
- Ensure that the instrument cluster HUD harness connector is disconnected.
- Turn the ignition switch to the RUN position.
- Use a DMM in order to measure the voltage between the instrument
cluster HUD harness connector terminal B1 and ground.
- Depress the UP button on the instrument cluster HUD dimmer switch.
Is the measured voltage within the specified value?
| 9-14 V
| Go to
Step 12
| Go to
Step 13
|
12
|
- Use a J 39200
digital
multimeter (DMM) in order to measure the voltage between the instrument cluster
HUD harness connector terminal B2 and ground.
- Press the DOWN button on the instrument cluster HUD dimmer switch.
Is the measured voltage within the specified value?
| 9-14 V
| Go to
Step 14
| Go to
Step 13
|
13
|
- Replace the instrument cluster HUD dimmer switch. Refer to
Head Up Display Switch Replacement
.
- Inspect the system.
Is the repair complete?
| --
| System OK
| --
|
14
|
- Replace the instrument cluster HUD display. Refer to
Head Up Display Module Replacement
.
- Inspect the system.
Is the repair complete?
| --
| System OK
| --
|
