TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Remove the Low Speed Rad Fan Relay #1 from the PDC.
Disconnect the Rad Fan #2 harness connector.
Measure the resistance between ground and the Low Speed Rad Fan Relay Output
circuit at the Low Speed Rad Fan Relay #1 connector in the PDC.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the short to ground in the Low Speed Rad Fan Output
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 4
4
Turn the ignition off.
Remove the Rad Fan Control Relay #3 from the PDC.
Disconnect the Rad Fan #2 harness connector.
Measure the resistance between ground and the Low Speed Rad Fan Relay Output
circuit at the Rad Fan Control Relay #3 connector in the PDC terminal
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the short to ground in the Low Speed Rad Fan Output
circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 5
5
NOTE: All relays and connectors reconnected.
Turn the ignition on.
With the DRBIII
t, actuate the Low Speed Rad Relay.
WARNING: Keep hands away from the Rad Fan when it is operating.
Disconnect the Rad Fan #1 harness connector.
Is the Fan #2 still operating?
All
Yes
→ Repair the Low Speed Rad Fan Output circuit for a short to
ground.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Replace the Rad Fan Assembly.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
6
Remove the Low Speed Relay #1 from the PDC.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit in the PDC.
Does the test light illuminate brightly?
All
Yes
→ Go To 7
No
→ Repair the open in the Fused B+ circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
7
Turn the ignition off.
Install a substitute relay in place of Radiator Fan Relay No. 1.
Turn the ignition on.
With the DRB, actuate the Low Speed Rad Fan Relay.
NOTE: Repeat the test above if the Rad Fans did not operate.
Did the Rad Fan operate normally when the relay(s) were substituted?
All
Yes
→ Replace the Radiator Fan Relay that allowed the Fans to operate
normally.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 8
309
DRIVEABILITY - NGC
*CHECKING RAD FAN LOW SPEED OPERATION (TURBO) —
Continued