Dodge Durango (HB). Manual — part 934
P0693-COOLING FAN 2 RELAY CONTROL CIRCUIT LOW (CONTINUED)
3.
HIGH SPEED RADIATOR FAN RELAY RESISTANCE
Measure the resistance of the High Speed Radiator Fan Relay Coil.
Is the resistance between 60 to 80 ohms?
Yes
>> Go To 4
No
>> Replace the Relay.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
4.
(N112) COOLING FAN NO.2 CONTROL CIRCUIT OPEN
Disconnect the IPM FCM 49 way harness connector.
Measure the resistance of the (N112) Cooling Fan No.2 Relay Control circuit from the Relay connection to the IPM
FCM 49 way harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Go To 5
No
>> Repair the open in the (N112) Cooling Fan No.2 Relay Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
5.
(N112) COOLING FAN NO.2 CONTROL CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (N112) Cooling Fan No.2 Relay Control circuit at the Relay con-
nection.
Is the resistance below 100 ohms?
Yes
>> Repair the short to ground in the (N112) Cooling Fan No.2 Relay Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 6
6.
FRONT CONTROL MODULE
NOTE: Before continuing, check the FCM 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.
Were there any problems found?
Yes
>> Repair as necessary.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
No
>> Replace the Front Control Module per Service Information.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
HB
ENGINE ELECTRICAL DIAGNOSTICS
9 - 735
P0694-COOLING FAN 2 RELAY CONTROL CIRCUIT HIGH
9 - 736
ENGINE ELECTRICAL DIAGNOSTICS
HB
P0694-COOLING FAN 2 RELAY CONTROL CIRCUIT HIGH (CONTINUED)
For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Ignition on with the Cooling Fan No.2 Relay powered on.
•
Set Condition:
The FCM detects the Cooling Fan No.2 Relay voltage above the acceptable voltage at the FCM. The circuit is
continuously monitored.
Possible Causes
(N112) COOLING FAN NO.2 RELAY CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
HIGH SPEED RADIATOR FAN RELAY
FRONT CONTROL MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
LOW SPEED RADIATOR FAN RELAY OPERATION
Ignition on, engine not running.
With a scan tool, actuate the High Speed Radiator Fan Relay.
Is the Cooling Fan Relay operating?
Yes
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 2
2.
(N112) COOLING FAN NO.2 RELAY CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Remove the High Speed Radiator Fan Relay.
Disconnect the IPM FCM 49 way harness connector.
Ignition on, engine not running.
Measure the voltage on the (N112) Cooling Fan No.2 Relay Control Circuit at the Relay terminal.
Is the voltage above 0 volts?
Yes
>> Repair the short to battery voltage in the (N112) Cooling Fan No.2 Relay Control circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 3
3.
HIGH SPEED RADIATOR FAN RELAY RESISTANCE
Measure the resistance of the High Speed Radiator Fan Relay Coil.
Is the resistance between 60 to 80 ohms?
Yes
>> Go To 4
No
>> Replace the High Speed Radiator Fan Relay.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
HB
ENGINE ELECTRICAL DIAGNOSTICS
9 - 737
P0694-COOLING FAN 2 RELAY CONTROL CIRCUIT HIGH (CONTINUED)
4.
FRONT CONTROL MODULE
NOTE: Before continuing, check the FCM 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.
Were there any problems found?
Yes
>> Repair as necessary.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
No
>> Replace Front Control Module per Service Information.
Perform BODY VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)
9 - 738
ENGINE ELECTRICAL DIAGNOSTICS
HB
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