Symptom:
P1653-PCI BUS SHORTED TO GROUND
When Monitored and Set Condition:
P1653-PCI BUS SHORTED TO GROUND
When Monitored:
With the ignition on.
Set Condition:
If the PCM detects a short to ground on the PCI Bus for more than 5
seconds, it will set this DTC.
POSSIBLE CAUSES
INTERMITTENT CONDITION
INTERNAL CONTROLLER SHORT TO GD
PCI BUS SHORT TO GROUND
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Measure the resistance between Ground and the PCI Bus circuit at the Data Link
Connector.
Is the resistance below 100 ohms?
All
Yes
→ Go To 2
No
→ Go To 3
2
Turn the ignition off.
Monitor the short to ground on the PCI Bus circuit at the DLC.
NOTE: A wide range of fluctuation in the resistance value may indicate BUS activity.
It may be necessary to wait for all modules to sleep (stop communicating) in order to
get an accurate reading.
Disconnect the Airbag controller, Cluster, RKE, SKIM, Radio, Side Air Bag Module,
and the PCM, one at a time, disconnecting the PCM last.
NOTE: If the resistance never changes with all of the controllers disconnected, there
is a short to ground in the harness.
Does the resistance change from below 100 ohms to above 100 ohms when discon-
necting any module?
All
Yes
→ Replace and reprogram the specific Control Module that is
causing the short to ground in accordance with the Service
Information.
Perform POWERTRAIN VERIFICATION TEST VER-1 - 1.6L.
No
→ Repair the short to ground in the PCI Bus circuit.
Perform POWERTRAIN VERIFICATION TEST VER-1 - 1.6L.
214
DRIVEABILITY - 1.6L GAS