Jeep Grand Cherokee WK. Manual — part 341
*NO RESPONSE FROM ORC (OCCUPANT RESTRAINT CONTROLLER) (CONTINUED)
3.
(F100) FUSED RUN RELAY OUTPUT CIRCUIT OPEN OR SHORTED
NOTE: Check the FCM for any ignition related DTCs before pro-
ceeding. If set (Refer to 8 - ELECTRICAL/IGNITION CONTROL -
DIAGNOSIS AND TESTING).
WARNING: To avoid personal injury or death, turn the ignition on,
then reconnect the battery.
Using a 12-volt test light connected to ground, check the (F100) Fused
Run Relay Output circuit.
Does the test light illuminate brightly?
Yes
>> Go To 4
No
>> Repair the (F100) Fused Run Relay Output circuit for an
open or short.
Perform AIRBAG VERIFICATION TEST - VER 1.
4.
(F20) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN OR SHORTED
Using a 12-volt test light connected to ground, check the (F20) Fused
Ignition Switch Output (RUN/START) circuit.
Does the test light illuminate brightly?
Yes
>> Go To 5
No
>> Repair the (F20) Fused Ignition Switch Output (RUN/
START) circuit for an open or short.
Perform AIRBAG VERIFICATION TEST - VER 1.
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
WK
*NO RESPONSE FROM ORC (OCCUPANT RESTRAINT CONTROLLER) (CONTINUED)
5.
(D55) AND (D54) CAN B BUS CIRCUITS OPEN
WARNING: If the Occupant Restraint Controller is dropped at any
time, it must be replaced. Failure to take the proper precautions
could result in accidental airbag deployment and personal injury
or death.
NOTE: One open circuit will not cause this condition.
Measure the voltage between the (D54) CAN B Bus (-) circuit and
ground.
Measure the voltage between the (D55) CAN B Bus (+) circuit and
ground.
Is there any voltage present on either circuit?
Yes
>> Replace the Occupant Restraint Controller Module in
accordance with the service information.
Perform AIRBAG VERIFICATION TEST - VER 1.
No
>> Repair the (D55) and (D54) CAN B Bus circuits for an
open. Inspect the connector for damage.
Perform AIRBAG VERIFICATION TEST - VER 1.
WK
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 211
*NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE)
8E - 212
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
WK
*NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
Possible Causes
(A209) FUSED B(+) CIRCUIT OPEN OR SHORTED
(Z130) (Z816) GROUND CIRCUIT OPEN
(F26) (F942) FUSED IGNITION SW OUTPUT CIRCUIT OPEN OR SHORTED
(D65) CAN C BUS (+) CIRCUIT OPEN
(D64) CAN C BUS (-) CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
With the scan tool, select ECU view.
NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active
on the Bus network. A green check indicates that the module is active on the Bus network.
NOTE: Check the FCM for any active CAN C hardware DTCs, perform DTC before proceeding.
Does the scan tool display a red X next to the module?
Yes
>> Go To 2
No
>> The no response condition is not present at this time. Using the wiring diagram/schematic as a guide,
inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con-
nectors for broken, bent , pushed out, and corroded terminals.
2.
(A209) FUSED B(+) CIRCUIT OPEN OR SHORTED
Turn the ignition off.
Disconnect the PCM C1 harness connector.
CAUTION: Do not probe the PCM harness connectors. Probing
the PCM harness connectors will damage the PCM terminals
resulting in poor terminal to pin connection. Install Miller Special
Tool #8815 to perform diagnosis.
Using a 12-volt test light connected to ground, check the (A209) Fused
B(+) circuit.
Does the test light illuminate brightly?
Yes
>> Go To 3
No
>> Repair the (A209) Fused B(+) circuit for an open or short.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER
- 5.
WK
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 213
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