Part 2
Signal too low (Continued)
Troubleshooting information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - FAULT FOUND
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Attempt New Test -
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FAULT FOUND - Fault-tracing information
No Fault Found - Fault-tracing information
FAULT-TRACING FAILED - Fault-tracing information
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Signal too low. Intermittent fault
Checking wiring and connections
- Check lead between throttle position sensor connector terminal 3 and MFI module #A1 for intermittent short-circuit to ground as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check lead between throttle position sensor connector terminal 2 and MFI module #A2 for intermittent open-circuit as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Press Continue when fault is repaired.
Continue -
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Troubleshooting information
Information
Attempt New Test -
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FAULT FOUND - Fault-tracing information
No Fault Found - Fault-tracing information
FAULT-TRACING FAILED - Fault-tracing information
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Signal too low. Intermittent fault
4-1-1TP sensor signal
Checking the leads and connections
- Check the TP sensor's and ECM's connectors for signs of loose connection as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults as well as contact resistance and oxidation as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check the lead between TP sensor connector 3 and ECM #A16 for signs of intermittent short circuiting to ground as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check the lead between TP sensor connector 2 and ECM #A15 for signs of an intermittent break as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , and intermittent short circuiting to ground as per Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Press Continue when fault is repaired.
Continue -
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Troubleshooting information
Information
Attempt New Test -
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FAULT FOUND - Fault-tracing information
No Fault Found - Fault-tracing information
FAULT-TRACING FAILED - Fault-tracing information
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Signal too low. Intermittent fault
EFI-411 Throttle position (TP) sensor signal
Checking cables and terminals
- Check throttle position (TP) sensor and engine control module (ECM) connectors for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between throttle position (TP) sensor terminal 3 and control module #A16 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , and an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Continue - Fault-tracing information
Fault-tracing information
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Fault-tracing information
Information
Attempt New Test - Checking cables and terminals
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FAULT FOUND - Fault-tracing information
No Fault Found - Fault-tracing information
FAULT-TRACING FAILED - Fault-tracing information
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Fault-tracing information
Information
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Attempt New Test - Status message
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Connecting test box
951 1351 ADAPTOR 86-PIN 951 1351 Adaptor 86-Pin 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428
Connecting up the Test box to Fenix 5.2
Is the test box connected to the control module?
Yes - FAULT FOUND
No - Connecting test box to connector B (grey)
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Connecting test box to connector B (grey)
- Ignition off.
- Disconnect control module.
- Connect adapter 951 1351 ADAPTOR 86-PIN 951 1351 Adaptor 86-Pin to control module connector.
- Connect test box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to adapter, connector B.
Press Continue.
Continue - No Fault Found
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FAULT FOUND - Checking signal cable resistance to ground
No Fault Found - Checking signal cable resistance to ground
FAULT-TRACING FAILED - Checking signal cable resistance to ground
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Connecting the breakout box
981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 981 3195 ADAPTOR 981 3195 Adaptor
Connecting the breakout box (Automatic transmission)
Is the breakout box connected to the control module?
Yes - CONNECTED
No - Connecting the breakout box
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Connecting the breakout box
Connecting the breakout box
981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 981 3195 ADAPTOR 981 3195 Adaptor
Connecting the breakout box
Caution! The control module power supply must be disconnected when connecting or disconnecting the breakout box, otherwise it may be damaged.
- Ignition off
- Disconnect the transmission control module (TCM).
- Connect adapter 981 3195 ADAPTOR 981 3195 Adaptor to transmission control module (TCM) connector and connect breakout box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to adapter.
Note! Ensure that the adaptor is the right way round - with the breakout box cable harness outwards towards the fender.
Select "Continue"
Continue - DONE
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DONE - Checking ground terminals
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Checking ground terminals
- Ignition off.
- Control module disconnected.
- Turn of all equipment in the car that takes power from the battery (the interior lighting and radio etc).
Connect an ohmmeter between the battery negative terminal and:
#20 (#A20) on the breakout box
#29 (#A29) on the breakout box.
The ohmmeter should read approximately 0 ohms for all readings
OK - No Fault Found
Not OK - Checking for an open-circuit, contact resistance and oxidation
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Checking for an open-circuit, contact resistance and oxidation
Check ground terminals 31/32 and 31/33 and cables between ground terminals and control module #A20 and #A29 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check ground lead between battery and bodywork for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair check that the fault has been remedied.
Carry out the following:
- Ignition off
- Turn of all equipment in the car that takes power from the battery (the interior lighting and radio etc).
- Control module disconnected.
Connect an ohmmeter between the battery negative terminal and:
#20 (#A20) on the breakout box
#29 (#A29) on the breakout box.
The ohmmeter should read approximately 0 ohms for all readings
OK - VERIFIED
Not OK - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.
Complete the fault-tracing for those fault or try again.
Do you want to terminate fault-tracing at this time?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking ground terminals
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FAULT FOUND - Checking signal to the transmission control module (TCM)
No Fault Found - Checking signal to the transmission control module (TCM)
FAULT-TRACING FAILED - Checking signal to the transmission control module (TCM)
CONNECTED - Checking signal to the transmission control module (TCM)
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Connecting test box
CONNECTED - Checking voltage drop over the engine control module (ECM) signal ground
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Connecting the breakout box
CONNECTED - Checking voltage drop over the transmission control module (TCM) signal ground
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Signal faulty. Permanent fault
2-4-3 TP sensor signal
Checking ground lead
- Ignition off.
- Disconnect TP sensor.
- Connect an ohmmeter between connector terminal 1 and ground.
Ohmmeter should read approx. 0 ohms.
OK -
Not OK - Check lead between #A18 and sensor terminal 1 for open circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
20 - 40 ohm - Wait 4 minutes with ignition off and then try again.
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Checking for open-circuit
- Check lead between #A18 and sensor terminal 1 for open circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press Continue when fault is repaired.
Continue -
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Fault tracing information
Power latch
The obtained reading, 20 - 40 ohms, could be caused by the Power latch which is a built-in function in the control module.
The control module switches to Power latch 4 minutes after the engine stops.
- Wait 4 minutes with ignition off.
Press Continue.
Continue - DONE
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DONE -
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Checking ground lead
- Ignition off.
- Disconnect TP sensor.
- Connect an ohmmeter between connector terminal 1 and ground.
Ohmmeter should read approx. 0 ohms.
OK -
Not OK - Check lead between #A18 and sensor terminal 1 for open circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
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Checking supply lead
- Disconnect TP sensor.
- Ignition on.
- Connect a voltmeter across connector terminals 1 and 2.
Voltmeter should read approx. 5 V.
OK -
Low -
High - Check lead between #A15 and connector terminal 2 for short circuit to supply as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
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Checking for short-circuit
- Check lead between #A15 and connector terminal 2 for short-circuit to supply as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press Continue when fault is repaired.
Continue -
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Checking supply lead resistance to ground
- Ignition off.
- Disconnect TP sensor.
- Disconnect control module.
- Connect an ohmmeter between connector terminal 2 and ground.
Ohmmeter should read infinite resistance.
OK - Check lead between #A15 and connector terminal 2 for open circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Not OK -
Check lead between #A15 and connector terminal 2 for short circuit to ground as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
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Checking for open-circuit
- Check lead between #A15 and connector terminal 2 for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Press Continue when fault is repaired.
Continue -
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Checking for short-circuit
- Check lead between #A15 and connector terminal 2 for short-circuit to ground as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press Continue when fault is repaired.
Continue -
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Checking signal lead resistance to ground
- Ignition off.
- Disconnect TP sensor.
- Connect an ohmmeter between connector terminal 3 and ground.
Ohmmeter should read 50 - 300 kohms.
OK -
Low - Check lead between #A16 and TP sensor terminal 2 for short-circuit to ground as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
High - Check lead between #A16 and connector terminal 3 for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
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Checking for open-circuit
- Check lead between #A16 and connector terminal 3 for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press Continue when fault is repaired.
Continue -
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