Dodge Dakota (ND). Manual — part 221
*NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) (CONTINUED)
5.
(D65) CAN C BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the FCM C1 harness connector.
Measure the resistance of the (D65) CAN C Bus (+) circuit between
the FCM connector and the appropriate terminal of the special tool
#8815.
Is the resistance below 5.0 ohms?
Yes
>> Go To 6
No
>> Repair the (D65) CAN C Bus (+) circuit for an open.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER
- 5.
6.
(D64) CAN C BUS (-) CIRCUIT OPEN
Measure the resistance of the (D64) CAN C Bus (-) circuit between
the FCM connector and the appropriate terminal of the special tool
#8815.
Is the resistance below 5.0 ohms?
Yes
>> Replace and program the Powertrain Control Module in
accordance with the service information.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER
- 5.
No
>> Repair the (D64) CAN C Bus (-) circuit for an open.
Perform (NGC) POWERTRAIN VERIFICATION TEST VER
- 5.
8E - 140
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
ND
*NO RESPONSE FROM RADIO
ND
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 141
*NO RESPONSE FROM RADIO (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
Possible Causes
(A920) FUSED B (+) CIRCUIT OPEN OR SHORTED
(Z514) OR (Z515) GROUND CIRCUIT OPEN
(D55) AND (D54) CAN B BUS CIRCUITS OPEN
RADIO
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.
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.
(A920) FUSED B(+) CIRCUIT OPEN OR SHORTED
Turn the ignition off.
Disconnect the Radio C1 harness connector.
Using a 12-volt test light connected to ground, check each (A920)
Fused B(+) circuit.
Does the test light illuminate brightly for each circuit?
Yes
>> Go To 3
No
>> Repair the (A920) Fused B(+) circuit for an open or short.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
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ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
ND
*NO RESPONSE FROM RADIO (CONTINUED)
3.
(Z514) OR (Z515) GROUND CIRCUIT OPEN
Using a 12-volt test light connected to 12-volts, check the (Z514) and
(Z515) ground circuits.
Does the test light illuminate brightly for each circuit?
Yes
>> Go To 4
No
>> Repair the (Z514) or the (Z515) ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
4.
(D55) AND (D54) CAN B BUS CIRCUITS OPEN
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 Radio in accordance with the service informa-
tion.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
No
>> Repair the (D55) and (D54) CAN B Bus circuits for an
open. Inspect the connector for damage.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
ND
ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS
8E - 143
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