Step
| Action
| Value(s)
| Yes
| No
|
1
| Has the vehicle
been inspected for Diagnostic Trouble Codes (DTCs)?
| --
| Go to
Step 2
| Go to Engine Controls
|
2
|
- Disconnect the Powertrain Control Module (PCM) connector C1.
- Turn the ignition switch to the RUN position.
Does the fuel gauge read FULL?
| --
| Go to
Step 3
| Go to
Step 4
|
3
|
- Turn the ignition switch to the OFF position.
- Leave the PCM connector C1 disconnected.
- Connect a fused jumper (3A), from the PCM connector C1 terminal
to ground.
Does the fuel gauge read EMPTY?
| --
| Go to
Step 7
| Go to
Step 4
|
4
|
- Remove the instrument cluster.
- Use a DMM in order to probe for continuity between the PCM connector
C1 terminal 3 and the instrument cluster connector terminal C14.
Is CKT 55 continuous between the PCM connector C2 terminal 5
and the instrument cluster connector terminal C14?
| --
| Go to
Step 6
| Go to
Step 5
|
5
|
- Repair the open, the short to ground, or the short to battery
power in CKT 55.
- Inspect the system.
Is the symptom still present?
| --
| Go to
Step 6
| System OK
|
6
|
- Replace the instrument cluster. Refer to
Instrument Cluster Replacement
.
- Inspect the system.
Is the symptom still present?
| --
| Go to
Step 7
| System OK
|
7
|
- Turn the ignition switch to the OFF position.
- Disconnect the PCM connector 2.
- Disconnect connector C405.
- Connect a (3 A ) fused jumper between C405 terminal F and ground.
- Use a DMM in order to probe for continuity between the PCM connector
C2 terminal 69 and ground.
Is the CKT 30 continuous between connector C405 terminal F and
the PCM connector C2 terminal 69?
| --
| Go to
Step 8
| Go to
Step 9
|
8
|
- Disconnect the fused jumper (3 A) between C405 terminal
F and ground.The DMM should remain connected between the PCM connector C2 terminal
69 and ground.
Is CKT 30 shorted to ground?
| --
| Go to
Step 9
| Go to
Step 10
|
9
|
- Repair the open, the excessive resistance, or the short to ground
in CKT 30 between the PCM connector C2 terminal 69 and the fuel level
sending unit connector.
- Inspect the system.
Is the symptom still present?
| --
| Go to
Step 10
| System OK
|
10
|
- Reconnect the PCM connectors C1 and C2.
- Connect the J 33431-C
between C405 terminal F and ground.
If J 33431-C
is unavailable,
use a resistor of equal value.
- Turn the ignition switch to the RUN position.
- Vary the J 33431-C
resistance from 40 ohms to 250 ohms.
As the resistance values change, does the fuel gauge indicator change
values approximately equal to those in the table following this diagnosis?
| --
| Go to
Step 11
| Go to
Step 14
|
11
|
- Turn the ignition switch to the OFF position.
- Disconnect the PCM connector C1.
- Inspect for a poor connection or an open in CKT 808 between
the PCM connector C1 terminal 17 and the connector C405 terminal D.
Does a poor connection or an open in CKT 808 between the PCM
connector C1 terminal 56 and the connector C405 terminal D exist?
| --
| Go to
Step 12
| Go to
Step 13
|
12
|
- Repair CKT 808 between the PCM connector C1 terminal 17
and the connector C405 terminal D for an open or an excessive.
- Inspect the system.
Is the symptom still present?
| --
| Go to
Step 13
| System OK
|
13
|
- Inspect the fuel tank sending unit connector for poor terminal
connections.
- Inspect the float for any obstructions or damage.
- Inspect the system.
Is the symptom still present?
| --
| Go to
Step 14
| System OK
|
14
|
- Replace the powertrain control module. Refer to Engine Controls.
- Inspect the system.
Is the symptom still present?
| --
| --
| System OK
|
