P0693-COOLING FAN 2 RELAY CONTROL CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
Ignition on and the High Speed Radiator Fan Relay is powered on.
- Set Condition:
The FCM detects and open or short in the Cooling Fan No.2 Relay Control circuit. The circuit is continuously monitored.
| Possible Causes |
| (A16) FUSED B+ CIRCUITS |
| (N112) COOLING FAN NO.2 RELAY CONTROL CIRCUIT OPEN |
| (N112) COOLING FAN NO.2 RELAY CONTROL CIRCUIT SHORTED TO GROUND |
| 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. HIGH SPEED RADIATOR FAN RELAY OPERATIONIgnition 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. (A16) FUSED B+ CIRCUITS
Turn the ignition off.
Remove the High Speed Radiator Fan Relay.
Using a 12-volt test light connected to ground, probe the (A16) Fused B+ circuits in the Relay connection.
Is the voltage above 11.0 volts?
Yes
- Go To 3
No
- Repair the open or short to ground in the (A16) Fused B+ circuits. Inspect the related fuse and repair as necessary.
- Perform BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
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 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 BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - 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 connection.
Is the resistance below 100 ohms?
Yes
- Repair the short to ground in the (N112) Cooling Fan No.2 Relay Control circuit.
- Perform BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - 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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace the Front Control Module per Service Information.
- Perform BODY VERIFICATION TEST. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)