Step
| Action
| Value(s)
| Yes
| No
|
1
|
- Turn the ignition switch off.
- Turn all electrical accessory loads off.
- 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 to verify proper operation.
- Connect red clip of tester to generator output terminal (CKT 2).
- Connect black clip to metal surface on generator housing.
- Observe the green POWER lamp on 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 matching connector on the J 41450-B to 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 73 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 a DMM, measure the voltage between the generator
output terminal (CKT 2) and the negative battery terminal.
Is voltage measured within the specified range?
| B+ (10-14V)
|
Go to Step 7
|
Go to Step 10
|
7
|
- Leave the DMM connected from 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 off.
- 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 2V
|
Go to Step 9
|
Go to Step 13
|
9
| Replace the generator. Refer to
Generator Replacement
for service procedure.
Is the repair complete?
| --
|
Go to Step
14
| --
|
10
| Repair open or poor connection in circuit 2.
Is the action complete?
| --
|
Go to Step
14
| --
|
11
| Repair open or poor connection between the generator and ground.
is the action complete?
| --
|
Go to Step
14
| --
|
12
| Check for a faulty J 41450-B. Refer to manufacturer's instructions
for more information.
Is the action complete?
| --
|
Go to Step
1
| --
|
13
| Repair short to B+ in circuit 225.
Is the action complete?
| --
|
Go to Step
14
| --
|
14
|
- Turn off load on J 41450-B.
- Disconnect J 41450-B from vehicle.
- Reconnect generator connector.
Is the action complete?
| --
| Go to
Charging System Check
| --
|
15
|
- Turn off load on J 41450-B.
- Stop the engine.
- Disconnect J 41450-B from vehicle.
- Reconnect generator connector.
- If the customer complaint about erratic or high voltage, check
generator connector terminal D (CKT 2740) for an open or intermittent
poor connection.
- If customer complaints about the battery losing charge over a
period of time, check for excessive parasitic loads. Refer to
Battery Electrical Drain/Parasitic Load
for further
diagnosis.
Is the action complete?
| --
| Go to
Charging System Check
| --
|
