"Special Test Mode" What does this do?
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Senior User
Joined: Nov 2010
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From: North Central Ohio
"Special Test Mode" What does this do?
I was looking through my Haynes Repair Manual which is where I learned to do the self test for codes and noticed they talk about a "Special Test Mode".
This is the info it gives me:
"Special test mode
The Output State Diagnostic Mode (DTM) is a very helpful tool to aid the technician, particularly in regards to emission control problems. Once initiated, this mode enables the technician to energize and de-energize most of the output actuators in the system on command. The mode is enabled by depressing the throttle at the continuous codes. Each time the throttle is depressed thereafter, all output actuators will change state (off to on, on to off) To discontinue the test, simply remove the jumper at the self-test connector."
What is this exactly? I've been running several different checks to determine if everything is ok on my truck and didn't know if this will help anything. I tried this and when I hit the pedal the check engine light came on and my overdrive off light came on. Does that say anything for me? lol. I was just curious as to what exactly this does or what it helps with.
This is the info it gives me:
"Special test mode
The Output State Diagnostic Mode (DTM) is a very helpful tool to aid the technician, particularly in regards to emission control problems. Once initiated, this mode enables the technician to energize and de-energize most of the output actuators in the system on command. The mode is enabled by depressing the throttle at the continuous codes. Each time the throttle is depressed thereafter, all output actuators will change state (off to on, on to off) To discontinue the test, simply remove the jumper at the self-test connector."
What is this exactly? I've been running several different checks to determine if everything is ok on my truck and didn't know if this will help anything. I tried this and when I hit the pedal the check engine light came on and my overdrive off light came on. Does that say anything for me? lol. I was just curious as to what exactly this does or what it helps with.
Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
Funny, I just went and located that paragraph too.I never realized it was there. I performed an "Action" similar to it once, but it was more like a "Cylinder Balance Test" according to my Code reader. It didn't work on mine though since I do not have SEFI.
Sorry I can't help ya there on what that Special Mode is. Maybe that is what it is..
Sorry I can't help ya there on what that Special Mode is. Maybe that is what it is..
Lead Driver
Joined: Nov 2002
Posts: 9,556
Likes: 43
From: Concord, NC
I think it's also called the "wiggle test" since you can activate all the actuators and mess with the wires if there is an intermittent problem with the TAD solenoid, for example. I don't think the computer is doing any self checks at that point.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
No it is not the Wiggle Test.
The Output State Diagnostic Test Mode (DTM) is below after the ++++++++++.
Here is the Wiggle Test.
Continuous Monitor Diagnostic Test Mode (Wiggle Test)
Special Note:
The technician can ATTEMPT to re-create and detect an intermittent fault using the Continuous Monitor DTM (Wiggle Test) procedures.
Key On Engine Off Wiggle Test Procedure
1. Hook up a Super Star II Tester, VOM or Scan Tool.
2. Turn the ignition key to the ON position.
3. For Super Star II Tester or VOM, activate, deactivate and reactivate Self-Test to enter Continuous Monitor Diagnostic Test Mode (DTM). For Scan Tool, enter DTM, then enter wiggle DTM.
4. Tap, move, and wiggle the suspect sensor and/or harness. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:
Super Star II Tester: Continuous Tone.
Malfunction Indicator Lamp (MIL): Lights
VOM: Needle Sweep
Scan Tool: Continuous Tone
Engine Running Wiggle Test Procedure
Special Note:
The Engine Running Wiggle Test may be activated any time the engine is running.
1. Hook up a Super Star II Tester, VOM or Scan Tool as shown.
2. Key off.
3. Start the engine.
4. For Super Star II Tester or VOM, activate Self-Test, deactivate and reactivate Self-Test to enter Engine Running Continuous Monitor DTM. DO NOT shut the engine off. For Scan Tool, enter DTM, then enter wiggle DTM.
5. Tap, move, and wiggle the suspect sensor and/or harness or drive the vehicle. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:
Super Star II Tester: Continuous Tone.
Malfunction Indicator Lamp (MIL): Lights
VOM: Needle Sweep
Scan Tool: Beeps
++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++
Output State Diagnostic Test Mode (DTM)
The Output State DTM aids in servicing output actuators associated with the EEC system. It enables the technician to energize and de-energize most of the system output actuators on command. This DTM is entered after all DTCs have been received from Key On Engine Off and Continuous Testing. At this time, leave Self-Test activated and depress the throttle. Each time the throttle is depressed, the output actuators will change state from energized to de-energized or from de-energized to energized.
1. Enter Self-Test.
2. DTC Output Ends.
3. Do Brief WOT.
4. EEC Output To Actuators Energized.
5. Do Brief WOT.
6. EEC Output To Actuators De-Energized.
7. For vehicles with LFC and HFC circuits:
To cycle the LFC and HFC outputs after code output ends, depress and hold throttle. For LFC, wait until the MIL flashes once (10 seconds). For HFC, wait until MIL flashes twice (15 seconds). Release throttle. The LFC or HFC output is now on (to cycle output off, depress and release throttle).
The Output State Diagnostic Test Mode (DTM) is below after the ++++++++++.
Here is the Wiggle Test.
Continuous Monitor Diagnostic Test Mode (Wiggle Test)
Special Note:
The technician can ATTEMPT to re-create and detect an intermittent fault using the Continuous Monitor DTM (Wiggle Test) procedures.
Key On Engine Off Wiggle Test Procedure
1. Hook up a Super Star II Tester, VOM or Scan Tool.
2. Turn the ignition key to the ON position.
3. For Super Star II Tester or VOM, activate, deactivate and reactivate Self-Test to enter Continuous Monitor Diagnostic Test Mode (DTM). For Scan Tool, enter DTM, then enter wiggle DTM.
4. Tap, move, and wiggle the suspect sensor and/or harness. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:
Super Star II Tester: Continuous Tone.
Malfunction Indicator Lamp (MIL): Lights
VOM: Needle Sweep
Scan Tool: Continuous Tone
Engine Running Wiggle Test Procedure
Special Note:
The Engine Running Wiggle Test may be activated any time the engine is running.
1. Hook up a Super Star II Tester, VOM or Scan Tool as shown.
2. Key off.
3. Start the engine.
4. For Super Star II Tester or VOM, activate Self-Test, deactivate and reactivate Self-Test to enter Engine Running Continuous Monitor DTM. DO NOT shut the engine off. For Scan Tool, enter DTM, then enter wiggle DTM.
5. Tap, move, and wiggle the suspect sensor and/or harness or drive the vehicle. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:
Super Star II Tester: Continuous Tone.
Malfunction Indicator Lamp (MIL): Lights
VOM: Needle Sweep
Scan Tool: Beeps
++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++
Output State Diagnostic Test Mode (DTM)
The Output State DTM aids in servicing output actuators associated with the EEC system. It enables the technician to energize and de-energize most of the system output actuators on command. This DTM is entered after all DTCs have been received from Key On Engine Off and Continuous Testing. At this time, leave Self-Test activated and depress the throttle. Each time the throttle is depressed, the output actuators will change state from energized to de-energized or from de-energized to energized.
1. Enter Self-Test.
2. DTC Output Ends.
3. Do Brief WOT.
4. EEC Output To Actuators Energized.
5. Do Brief WOT.
6. EEC Output To Actuators De-Energized.
7. For vehicles with LFC and HFC circuits:
To cycle the LFC and HFC outputs after code output ends, depress and hold throttle. For LFC, wait until the MIL flashes once (10 seconds). For HFC, wait until MIL flashes twice (15 seconds). Release throttle. The LFC or HFC output is now on (to cycle output off, depress and release throttle).
Thread Starter
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Senior User
Joined: Nov 2010
Posts: 105
Likes: 0
From: North Central Ohio
No it is not the Wiggle Test.
The Output State Diagnostic Test Mode (DTM) is below after the ++++++++++.
Here is the Wiggle Test.
Continuous Monitor Diagnostic Test Mode (Wiggle Test)
Special Note:
The technician can ATTEMPT to re-create and detect an intermittent fault using the Continuous Monitor DTM (Wiggle Test) procedures.
Key On Engine Off Wiggle Test Procedure
1. Hook up a Super Star II Tester, VOM or Scan Tool.
2. Turn the ignition key to the ON position.
3. For Super Star II Tester or VOM, activate, deactivate and reactivate Self-Test to enter Continuous Monitor Diagnostic Test Mode (DTM). For Scan Tool, enter DTM, then enter wiggle DTM.
4. Tap, move, and wiggle the suspect sensor and/or harness. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:
Super Star II Tester: Continuous Tone.
Malfunction Indicator Lamp (MIL): Lights
VOM: Needle Sweep
Scan Tool: Continuous Tone
Engine Running Wiggle Test Procedure
Special Note:
The Engine Running Wiggle Test may be activated any time the engine is running.
1. Hook up a Super Star II Tester, VOM or Scan Tool as shown.
2. Key off.
3. Start the engine.
4. For Super Star II Tester or VOM, activate Self-Test, deactivate and reactivate Self-Test to enter Engine Running Continuous Monitor DTM. DO NOT shut the engine off. For Scan Tool, enter DTM, then enter wiggle DTM.
5. Tap, move, and wiggle the suspect sensor and/or harness or drive the vehicle. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:
Super Star II Tester: Continuous Tone.
Malfunction Indicator Lamp (MIL): Lights
VOM: Needle Sweep
Scan Tool: Beeps
++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++
Output State Diagnostic Test Mode (DTM)
The Output State DTM aids in servicing output actuators associated with the EEC system. It enables the technician to energize and de-energize most of the system output actuators on command. This DTM is entered after all DTCs have been received from Key On Engine Off and Continuous Testing. At this time, leave Self-Test activated and depress the throttle. Each time the throttle is depressed, the output actuators will change state from energized to de-energized or from de-energized to energized.
1. Enter Self-Test.
2. DTC Output Ends.
3. Do Brief WOT.
4. EEC Output To Actuators Energized.
5. Do Brief WOT.
6. EEC Output To Actuators De-Energized.
7. For vehicles with LFC and HFC circuits:
To cycle the LFC and HFC outputs after code output ends, depress and hold throttle. For LFC, wait until the MIL flashes once (10 seconds). For HFC, wait until MIL flashes twice (15 seconds). Release throttle. The LFC or HFC output is now on (to cycle output off, depress and release throttle).
The Output State Diagnostic Test Mode (DTM) is below after the ++++++++++.
Here is the Wiggle Test.
Continuous Monitor Diagnostic Test Mode (Wiggle Test)
Special Note:
The technician can ATTEMPT to re-create and detect an intermittent fault using the Continuous Monitor DTM (Wiggle Test) procedures.
Key On Engine Off Wiggle Test Procedure
1. Hook up a Super Star II Tester, VOM or Scan Tool.
2. Turn the ignition key to the ON position.
3. For Super Star II Tester or VOM, activate, deactivate and reactivate Self-Test to enter Continuous Monitor Diagnostic Test Mode (DTM). For Scan Tool, enter DTM, then enter wiggle DTM.
4. Tap, move, and wiggle the suspect sensor and/or harness. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:
Super Star II Tester: Continuous Tone.
Malfunction Indicator Lamp (MIL): Lights
VOM: Needle Sweep
Scan Tool: Continuous Tone
Engine Running Wiggle Test Procedure
Special Note:
The Engine Running Wiggle Test may be activated any time the engine is running.
1. Hook up a Super Star II Tester, VOM or Scan Tool as shown.
2. Key off.
3. Start the engine.
4. For Super Star II Tester or VOM, activate Self-Test, deactivate and reactivate Self-Test to enter Engine Running Continuous Monitor DTM. DO NOT shut the engine off. For Scan Tool, enter DTM, then enter wiggle DTM.
5. Tap, move, and wiggle the suspect sensor and/or harness or drive the vehicle. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:
Super Star II Tester: Continuous Tone.
Malfunction Indicator Lamp (MIL): Lights
VOM: Needle Sweep
Scan Tool: Beeps
++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++
Output State Diagnostic Test Mode (DTM)
The Output State DTM aids in servicing output actuators associated with the EEC system. It enables the technician to energize and de-energize most of the system output actuators on command. This DTM is entered after all DTCs have been received from Key On Engine Off and Continuous Testing. At this time, leave Self-Test activated and depress the throttle. Each time the throttle is depressed, the output actuators will change state from energized to de-energized or from de-energized to energized.
1. Enter Self-Test.
2. DTC Output Ends.
3. Do Brief WOT.
4. EEC Output To Actuators Energized.
5. Do Brief WOT.
6. EEC Output To Actuators De-Energized.
7. For vehicles with LFC and HFC circuits:
To cycle the LFC and HFC outputs after code output ends, depress and hold throttle. For LFC, wait until the MIL flashes once (10 seconds). For HFC, wait until MIL flashes twice (15 seconds). Release throttle. The LFC or HFC output is now on (to cycle output off, depress and release throttle).
Can any of that be done without the need of special tools? Like the VOM test? I think that could help me. I never heard of the wiggle test before.
Lead Driver
Joined: Nov 2002
Posts: 9,556
Likes: 43
From: Concord, NC
I guess my memory of the wiggle test wasn't right, sorry about that. I'm now second guessing myself, but I thought that all the EEC-IV self tests could be done without a dedicated code reader.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
Some times when I posts I will edit out the special tools and just leave the MIL (some calls it a CEL). But I left it in tact this time as it comes from the FORD shop Manual.
Here is an edited version of the Wiggle Test.
Continuous Monitor Diagnostic Test Mode (Wiggle Test)
Special Note:
The technician can ATTEMPT to re-create and detect an intermittent fault using the Continuous Monitor DTM (Wiggle Test) procedures.
Key On Engine Off Wiggle Test Procedure
1. VOM if you have one to the MIL pin#4 of the self-test plug.
The VOM will just swing when the MIL on the dash comes on.
2. Turn the ignition key to the ON position.
3. Activate, deactivate and reactivate Self-Test to enter Continuous Monitor Diagnostic Test Mode (DTM).
4. Tap, move, and wiggle the suspect sensor and/or harness. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:
Malfunction Indicator Lamp (MIL): Lights
If using a VOM the needle will sweep
Engine Running Wiggle Test Procedure
Special Note:
The Engine Running Wiggle Test may be activated any time the engine is running.
1. Key off.
2. Start the engine.
3. Activate Self-Test, deactivate and reactivate Self-Test to enter Engine Running Continuous Monitor DTM. DO NOT shut the engine off.
4. Tap, move, and wiggle the suspect sensor and/or harness or drive the vehicle. When a fault is detected, a Continuous Memory DTC will be stored in memory and indicated as follows:
Malfunction Indicator Lamp (MIL): Lights
VOM: Needle Sweep if hooked up.
Scan Tool: Beeps if hooked up.
/
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