Starter motor interlock +50
Symptom: The starter motor does not work.The alarm is not activated in the start position with the anti-theft alarm armed. The starter motor runs at different ignition switch positions.
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Starter motor interlock +50
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Fault symptom
The starter motor does not work.
The alarm is not activated in the start position with the anti-theft alarm armed. The starter motor runs at different ignition switch positions.
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Important
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If the LED flashes, the car may be self-immobilized.
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Diagnostic procedure
1 Check the fuses
Check Maxi fuse 2 and fuse 36 and check that there voltage to each fuse. Connect the test lamp between
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Fuse, Maxi 2 and good grounding point, the test lamp should go on.
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Fuse 36 and a good grounding point, the test lamp should go on when the ignition key is turned to "ST" (+50).
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Is the test lamp on?
Continue with point 2.
Continue fault diagnosis as described in Service Manual 3:2 Electrical system, "+30 power supply" and "Starting system".
2 Check the +50 power supply
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Unplug connector H33-3.
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Connect the test lamp to pin 33 of connector H33-3 and a good ground.
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Turn the ignition switch to the "ST" position (+50).
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The test lamp should light.
Is the test lamp on?
Continue with point 3.
Proceed to point 10.
3 Check the starting system
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Connect a jumper lead between pins 33 and 32 of connector H33-3.
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The gear lever should be in neutral on cars with a manual gearbox (including Sensonic) and the selector lever in position "P" on cars with automatic transmission.
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Turn the ignition switch to the "ST" position (+50).
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The starter motor should run.
Is the starter motor cranking?
Continue with point 4.
Proceed to point 11.
4 Check the starter relay's contacts
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Plug in connector H33- 3.
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Unplug the starter relay.
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Connect a jumper lead between pins 30 and 87 of the starter relay socket.
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The starter motor should run.
Is the starter motor cranking?
Continue with point 8.
Continue with point 5.
5 Check the starter relay's +30 power supply
Connect the test lamp to pin 30 of the starter relay socket and a good ground.
The test lamp should light.
Is the test lamp on?
Continue with point 6.
Continue with point 7.
6 Check the wiring connected to the starter motor
Check the wiring harness for continuity between pin 87 of the starter relay socket and pin 50 of the starter motor.
The resistance should be < 1 ohm.
Is the resistance correct?
Continue fault diagnosis as described in Service Manual 3:2 "Electrical system, Starting system".
Check and repair or replace the wiring, including connectors.
7 Check the wiring connected to the Maxi 2 fuse.
Connect the test lamp to the Maxi 2 fuse and a good ground.
The test lamp should light.
Is the test lamp on?
Check and repair or replace the wiring, including crimped connections.
Continue fault diagnosis as described in Service Manual 3:2 Electrical system, "+30 power supply".
8 Check the starter relay's +50 power supply
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Connect the test lamp to pin 86 of the starter relay socket and a good ground.
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The gear lever should be in neutral on cars with a manual gearbox (including Sensonic) and the selector lever in position "P" on cars with automatic transmission.
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Turn the ignition switch to the "ST" position (+50).
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The test lamp should light.
Is the test lamp on?
Continue with point 9.
Proceed to point 12.
9 Check the starter relay's connection to ground
Connect the test lamp to pins 85 and 30 of the starter relay socket.
The test lamp should light.
Is the test lamp on?
Change the starter relay.
Check and repair or replace the wiring, including grounding point G33S.
10 Check the wiring connected to fuse 36
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Connect the test lamp to fuse 36 and a good grounding point.
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Turn the ignition switch to the "ST" position (+50).
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The test lamp should light.
Is the test lamp on?
Check and repair or replace the wiring.
Continue fault diagnosis as described in Service Manual 3:2 "Electrical system, Starting system".
11 Check the wiring connected to the electronic control module
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Unplug the control module.
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Check the wiring harness for continuity between - connector H33-3 (pin 33) and the electronic control module (pin 20). - connector H33-3 (pin 32) and the electronic control module (pin 8).
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The resistance should be < 1 ohm.
Is the resistance correct?
Proceed to point 13.
Repair or replace the wiring harness.
12 Check the wiring connected to the starter relay
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Cars equipped with Sensonic Continue fault diagnosis in service Manual 4:4 "Automatic clutch operation, Sensonic".
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Cars with automatic transmission: Continue fault diagnosis as described in Service Manual 4:2 "Automatic transmission".
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Cars with a manual gearbox: Check the wiring harness for continuity between pin 32 of connector H33-3 and pin 86 of the starter relay socket.
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The resistance should be < 1 ohm.
Is the resistance correct?
Proceed to point 13.
Repair or replace the wiring harness.
13 Final check
Start the car and check to see if the fault symptom remains.
Is the problem still present?
See "Before replacing a control module".
The remedial measures taken were correct or the fault is of intermittent nature.
