TEST
ACTION
APPLICABILITY
3
Ignition on, engine not running.
Record all DTC’s and freeze frame data, now erase Codes.
Carefully inspect all Connectors for corrosion or spread Terminals before continuing.
With the DRBIII
t actuate the Generator Field Driver Circuit.
Backprobe the Generator Field Source (+) Circuit at back of Generator.
Is the voltage above 10.0 volts?
All
Yes
→
Go To
4
No
→
Repair the open Generator Field Source (+) Circuit from Gener-
ator.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
4
Turn the ignition off.
Disconnect the PCM harness connector(s).
Disconnect the Generator Field harness connector.
Measure the Generator Field Driver Circuit from PCM Connector to ground.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the Generator Field Driver Circuit shorted to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→
Go To
5
5
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the Generator Field harness connector.
Note: Check Connectors - Clean/repair as necessary.
Measure the Generator Field Driver Circuit from PCM to Generator.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
6
No
→
Repair the open Generator Field Driver Circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
6
Turn the ignition off.
Disconnect the Generator Field harness connector at back of the Generator.
Note: Check connectors - Clean/repair as necessary.
Measure resistance across the Generator Field Terminals at the Generator.
Is the resistance below 5.0 ohms?
All
Yes
→
Repair the Generator as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→
Go To
7
7
If there are no possible causes remaining, view repair.
All
Repair
Replace the Powertrain Control Module.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
17
CHARGING
P0622-GENERATOR FIELD NOT SWITCHING PROPERLY —
Continued