Step
| Action
| Value(s)
| Yes
| No
|
1
| Inspect the fuse block for an open in IP-IGN fuse block.
Is the IP-IGN fuse open?
| --
| Go to
Step 2
| Go to
Step 3
|
2
|
- Repair the short to ground in CKT 39.
- Inspect the system.
Is the symptom still present?
| --
| --
| System OK
|
3
|
- Disconnect the instrument cluster head-up display (HUD) connector.
- Use a DMM in order to measure the resistance between the instrument
cluster HUD harness connector terminal A8 and ground.
Is the measured resistance to ground within the specified value?
| 0-3 ohms
| Go to
Step 5
| Go to
Step 4
|
4
|
- Repair any opens, a poor connection, or a short to B+ in CKT 1550
between the instrument cluster HUD harness connector terminal A8 and G200.
- Inspect the system.
Is the symptom still present?
| --
| --
| System OK
|
5
|
- Disconnect the instrument cluster HUD dimmer switch.
- Turn the ignition switch to the RUN position.
- Use a 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 range?
| 9-14 Volts
| Go to
Step 7
| Go to
Step 6
|
6
|
- Repair any opens, a poor connection, or a short to ground in CKT 39
between the instrument cluster HUD dimmer switch harness connector terminal
A and the fuse block IP-IGN fuse.
- Inspect the system.
Is the symptom still present?
| --
| --
| System OK
|
7
|
- Turn the ignition switch to the OFF position.
- Reconnect the instrument cluster HUD harness connector.
- Connect a fused 10 amp jumper between the instrument cluster
HUD dimmer switch harness connector terminals A and F.
- Connect a fused 10 amp jumper between the instrument cluster
HUD dimmer switch harness connector terminals A and C.
- Turn the ignition switch to the RUN position.
Is the instrument cluster HUD operational?
| --
| Go to
Step 11
| Go to
Step 8
|
8
| Inspect for any opens, poor connection, or a short to ground in CKT 622
between the instrument cluster HUD dimmer switch harness connector terminal
F and the instrument cluster HUD harness connector terminal A1.
Is the wiring CKT 662 open, shorted to ground, or showing signs
of excessive resistance?
| --
| Go to
Step 9
| Go to
Step 10
|
9
|
- Repair CKT 622 between the instrument cluster HUD dimmer
switch harness connector terminal F and the instrument cluster HUD harness
connector terminal A1, as needed.
- Inspect the system.
Is the symptom still present?
| --
| --
| System OK
|
10
|
- Replace the instrument cluster head-up display (HUD). Refer to
Head Up Display Module Replacement
.
- Inspect the system.
Is the symptom still present?
| --
| --
| System OK
|
11
|
- Replace the instrument cluster head-up display (HUD) dimmer switch.
Refer to
Head Up Display Switch Replacement
.
- Inspect the system.
Is the symptom still present?
| --
| --
| System OK
|
