Step
| Action
| Value(s)
| Yes
| No
|
1
|
- Turn the ignition switch to the OFF position.
- Turn OFF all the electrical accessory loads.
- Turn load off in the J 41450-B.
- Connect the J 41450-B to the vehicle battery terminals.
- Install inductive ammeter around output wire (CKT 2 - Red)
of generator.
- Perform J 41450-B self test in order to verify proper operation.
- Connect red clip of tester to generator output terminal (CKT 2).
- Connect the black clip to metal surface on generator housing.
- Observe the green POWER lamp the J 41450-B.
Does the green POWER lamp illuminate?
| --
| Go to
Step 2
| Go to
Step 6
|
2
|
- Disconnect the generator 4-way electrical connector.
- Connect the matching connector on the J 41450-B to the
generator.
- Observe the red DIAGNOSTIC lamp on J 41450-B.
Does the red DIAGNOSTIC lamp illuminate?
| --
| Go to
Step 3
| Go to
Step 8
|
3
|
- Start the engine.
- Allow engine to idle for 1 minute.
- Observe the red DIAGNOSTIC lamp on the J 41450-B.
Does the red DIAGNOSTIC lamp turn off?
| --
| Go to
Step 4
| Go to
Step 9
|
4
|
- Increase engine speed to 2500 rpm.
- Observe the red DIAGNOSTIC lamp on J 41450-B.
Does the red DIAGNOSTIC lamp remain off?
| --
| Go to
Step 5
| Go to
Step 9
|
5
|
- Maintain engine speed at 2500 rpm.
- Set the load on the J 41450-B to 77 amperes.
- Observe the red DIAGNOSTIC lamp on J 41450-B.
Does the red DIAGNOSTIC lamp remain off?
| --
| Go to
Step 15
| Go to
Step 9
|
6
| Using J 39200
, measure the voltage between the generator output terminal
(circuit 2) and the negative battery terminal.
Is the voltage measured within the specified range?
| B+ (10-14 V)
| Go to
Step 7
| Go to
Step 10
|
7
|
- Leave the DMM connected from the previous step.
- Connect a jumper wire between the negative battery terminal and
the metal housing of the generator.
- Observe the green POWER lamp on J 41450-B.
Does the green POWER lamp illuminate?
| --
| Go to
Step 11
| Go to
Step 12
|
8
|
- Turn the ignition switch to the OFF position.
- Disconnect J 41450-B 4-way connector from generator.
- Disconnect the PCM connector C2.
- Using a DMM, measure the voltage between the generator harness
connector terminal L and ground.
Is the voltage measured within the specified value?
| Less than 2 V
| Go to
Step 9
| Go to
Step 13
|
9
|
- Replace the generator. Refer to
Generator Replacement
.
- Recheck the system.
Is the repair complete?
| --
| Go to
Step 14
| --
|
10
|
- Repair a poor connection or an open in CKT 2.
- Recheck the system.
Is the repair complete?
| --
| Go to
Step 14
| --
|
11
|
- Repair a poor connection or an open between the generator and
ground.
- Recheck the system.
Is the repair complete?
| --
| Go to
Step 14
| --
|
12
|
- Inspect for a faulty J 41450-B. Refer to the manufacturer's
instructions for more information.
- Recheck the system.
Is the repair complete?
| --
| Go to
Step 1
| --
|
13
|
- Repair a short to B+ in CKT 225.
- Recheck the system.
Is the repair complete?
| --
| Go to
Step 14
| --
|
14
|
- Turn off the load on J 41450-B.
- Disconnect J 41450-B from the vehicle.
- Reconnect the generator connector.
- Recheck the system.
Is the repair complete?
| --
| Go to
Charging System Check
| --
|
15
|
- Turn off load on J 41450-B.
- Stop the engine.
- Disconnect J 41450-B from the vehicle.
- Reconnect the generator connector.
- If the battery shows erratic or high voltage, inspect the generator
connector terminal D (CKT 2740) for an open or intermittent
poor connection.
- If the battery is losing charge over a period of time, inspect
for excessive parasitic loads. Go to
Battery Electrical Drain/Parasitic Load
- Recheck the system.
Is the repair complete?
| --
| Go to
Charging System Check
| --
|
