Step
| Action
| Value(s)
| Yes
| No
|
1
| Was the charging system check performed?
| --
|
Go to Step 2
| Go to
Charging System Check
|
2
| Check the battery
hydrometer.
Is the green dot visible in the hydrometer?
| --
|
Go to Step 7
|
Go to Step
3
|
3
| Diagnose the battery hydrometer. Refer to
Battery Hydrometer Displays Dark or Yellow Dot
.
Is the charging system diagnosis complete?
| --
|
Go to Step 17
| --
|
4
| Perform the battery load test. Refer to
Battery Load Test
.
Did the battery pass the load test?
| --
|
Go to Step 6
|
Go to Step 5
|
5
| Replace the battery. Refer to
Battery Replacement
.
Is the repair complete?
| --
|
Go to Step
17
| --
|
6
| Check the generator. Refer to
Generator Not Operating Properly
.
Does the generator operate properly?
| --
|
Go to Step 7
|
Go to Step 16
|
7
|
- Turn the ignition switch to ON.
- Start the engine and keep the engine running at fast idle.
- Disconnect the battery thermistor connector, located near the
battery.
- Using a DMM set to DC volts scale, measure the voltage across
the battery terminals.
Is the voltage in the specified range?
| 13-16V
|
Go to Step 8
|
Go to Step 13
|
8
|
- Turn the ignition switch to OFF.
- Using a DMM set to DC volts scale, measure the voltage at battery
thermistor connector terminal A (body harness side).
Is the measured voltage in the specified range?
| 10-15V
|
Go to Step 10
|
Go to Step 9
|
9
|
- Check the DIM fuse for an open.
- If the fuse is open, repair CKT 3340 (ORN) short to ground.
- If the fuse is OK, repair open or high resistance in CKT 3340
(ORN).
Is the circuit repair complete?
| --
|
Go to Step
17
| --
|
10
|
- Disconnect the generator connector.
- Connect a fused jumper from generator harness connector terminal
D to ground.
- Connect a DMM set to ohms scale between the battery thermistor
connector terminal B (body harness side) and ground.
Is the measured resistance in the specified range?
| --
|
Go to Step 12
|
Go to Step 11
|
11
| Repair high resistance or open in CKT 725 (LT BLU).
Is the circuit repair complete?
| --
|
Go to Step
17
| --
|
12
|
- Check the battery thermistor connector for poor terminal contact.
- If OK, replace the battery thermistor.
Is the replacement complete?
| --
|
Go to Step
17
| --
|
13
|
- Turn the ignition switch to OFF.
- Disconnect the powertrain control module (PCM) connector C1.
- Turn the ignition switch to ON.
Is the charge indicator still on?
| --
|
Go to Step
14
|
Go to Step 15
|
14
| Service the instrument cluster. Refer to
Battery Charge Indicator Always On
in Instrument Panel, Gauges and
Console.
Is the repair complete?
| --
|
Go to Step
17
| --
|
15
|
- Check PCM connector C1 for poor terminal contact at terminals 54
and 75.
- If OK, replace the PCM. Refer to
Powertrain Control Module Replacement
in Engine Controls -- 4.6L.
Is the replacement complete?
| --
|
Go to Step
17
| --
|
16
| Replace the generator. Refer to
Generator Replacement
.
Is the replacement complete?
| --
|
Go to Step
17
| --
|
17
| Repeat the Charging System Check. Refer to
Charging System Check
.
Is the system check complete?
| --
| SYSTEM OK
| --
|
