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DRIVEABILITY - DIESEL
P0560-SYSTEM VOLTAGE TOO LOW —
TEST
1
NOTE: If there are any Battery Sense DTCs (P1511 or P1512) present with
this DTC, diagnose the Battery Sense DTCs first.
NOTE: Inspect the vehicle for aftermarket accessories that may exceed the
Generator capacity.
NOTE: The battery must be fully charged before continuing.
Inspect the generator belt condition and tension.
Is the generator belt in good condition and tensioned properly?
Yes → Go To 2
→ Repair as necessary.
No
2
Turn the ignition on.
With the DRB, erase ECM DTCs.
Start the engine several times. Allow the engine to run for at least 30 seconds each
run cycle while turning the ignition off for at least 10 seconds between each run cycle.
Monitor the DRB for ECM DTCs.
Did this DTC set again?
Yes → Go To 3
→ Go To 14
No
3
Connect the positive lead of a voltmeter to the generator B+ (12V) terminal and the
negative lead to the battery positive (+) post.
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Start the engine.
Is the voltage on the voltmeter below 0.4 volt?
Yes → Go To 4
→ Repair the Generator Fused B+ circuit for high resistance.
No
4
Connect the positive lead of a voltmeter to the generator case (housing) and the
negative lead to the battery negative (-) post.
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Start the engine.
Is the voltage on the voltmeter below 0.4 volt?
Yes → Go To 5
→ Repair the Generator Ground circuit for high resistance.
No
5
Turn the ignition off.
Measure the voltage between the body and the negative battery terminal.
Is the voltage below 0.4 volt?
Yes → Go To 6
→ Repair the Body Ground circuit for an open.
No
ACTION
Perform CHARGING VERIFICATION - VER-3.
Perform CHARGING VERIFICATION - VER-3.
Perform CHARGING VERIFICATION - VER-3.
Perform CHARGING VERIFICATION - VER-3.
Continued
120
APPLICABILITY
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