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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1440 (Engine Cooling) >> Diagnostic Information and Procedures >> DTC P0480, P0481, P0691, P0692, P0693, P0694, or P1650 >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  Listen for an audible click when the low speed fan relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
  2. 3:  Listen for an audible click when the low and high speed fan relays operate. Command both the ON and OFF states. Repeat the commands as necessary.
DTC P0480, P0481, P0691, P0692, P0693, P0694, or P1650

Step Action Yes No
Schematic Reference: Engine Cooling Schematics 
Connector End View Reference:  Cooling System Connector End Views  
1 Did you perform the Engine Cooling Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Engine Cooling 
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, command the Fan Control 1 ON and OFF.
Does the low speed fan relay turn ON and OFF with each command?		 Go to Step 3  Go to Step 4 
3  With a scan tool, command the Fan Control 2 ON and OFF.
Do the low and the high speed fan relays turn ON and OFF with each command?		 Go to Diagnostic Aids Go to Step 6 
4
  1. Turn OFF the ignition.
  2. Disconnect the low speed fan relay.
  3. Turn ON the ignition, with the engine OFF.
  4. Probe the battery positive circuit of the low speed fan relay with a test lamp that is connected to a good ground.
Does the test lamp illuminate?		 Go to Step 5  Go to Step 14 
5
  1. Connect a test lamp between the control circuit of the low speed fan relay and the battery positive voltage circuit of the low speed fan relay.
  2. With a scan tool, command the Fan Control ON and OFF.
Does the test lamp turn ON and OFF with each command?		 Go to Step 11  Go to Step 8 
6
  1. Turn OFF the ignition.
  2. Disconnect the high speed fan relay.
  3. Turn ON the ignition, with the engine OFF.
  4. Probe the battery positive voltage circuit of the high speed fan relay with a test lamp that is connected to a good ground.
Does the test lamp illuminate?		 Go to Step 7  Go to Step 14 
7
  1. Connect a test lamp between the control circuit of the high speed fan relay and the battery positive voltage circuit of the high speed fan relay.
  2. With a scan tool, command the Fan Control 2 ON and OFF.
Does the test lamp turn ON and OFF with each command?		 Go to Step 12  Go to Step 8 
8 Does the test lamp remain illuminated with each command? Go to Step 10  Go to Step 9 
9 Test the control circuit of the appropriate relay for a short to voltage or an open. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 15 
10 Test the control circuit of the appropriate relay for a short to ground. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 13 
11 Inspect for poor connections at the low speed fan relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 15 
12 Inspect for poor connections at the high speed fan relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 16 
13 Inspect for poor connections at the harness connector of the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 18  Go to Step 17 
14 Repair the battery positive voltage circuit for an open or high resistance. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 18  -
15 Replace the low speed fan relay.
Did you complete the repair?		 Go to Step 18  -
16 Replace the high speed fan relay.
Did you complete the repair?		 Go to Step 18  -
17
IMPORTANT: Perform the programming procedure for the ECM.
Replace the ECM. Refer to ENGINE CONTROL MODULE in Engine Controls - 2.2L or ENGINE CONTROL MODULE in Engine Controls - 3.0L.Did you complete the replacement?		 Go to Step 18  -
18
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 2  System OK
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