TEST
ACTION
APPLICABILITY
4
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.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRBIII
t
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DRBIII
t Freeze Frame information. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→ Repair as necessary
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→ Test Complete.
5
Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the Generator Field harness connector.
Measure the resistance of the (K20) Generator Field Driver circuit from the PCM
harness connector to ground.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the short to ground in the (K20) Generator Field Driver
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→ Go To 6
6
Turn the ignition off.
Disconnect the Generator Field harness connector.
Measure resistance of the Generator Field Driver terminal pin of the Generator to
ground.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair or replace the shorted Generator as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
No
→ Go To 7
7
NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 3.
191
DRIVEABILITY - SBEC
P1594-CHARGING SYSTEM VOLTAGE TOO HIGH —
Continued