Hi. I hope someone here can help. I have a 2020 Swift with keyless and it won't start. These are my findings:
Battery in keyfob is new.
When you press the start/stop button once, Acc comes on. Press s/s again and IGN comes on but the engine management light and the immobilizer light (the little orange key) do not come on. All other normal ones do.
Press s/s to start the car and the engine cranks once. Press again and the engine keeps cranking.
The fuel pump relay does not energize.
Following voltage tests done with ignition 'on':
CKP sensor
CMP sensor
MAF sensor
- no voltage
Following checked:
All fuses checked.
Plugs on ECM removed and replace (in case of bad connection).
No visible sign of damage to the wiring loom, like rodent chewing.
Removed the plugs from the CKP, CMP, and MAF to check if one of them might be pulling down the voltage.
Next step, swapped out the relays to see if that is the problem (voltage not getting to the ECM)
Relays in the engine compartment fuse box swapped out one by one with a known good one- no change. Swapped out the relay in the passenger footwell- no change.
Checked ground from battery connection to body, to gearbox, and to engine, all read 0.7ohm.
Found that with the ECU connected or disconnected the engine cranks the same way (as explained above).
When switching the ignition 'on' (pressing start button twice without depressing the clutch) the immobilizer lamp (key) and the engine management lamp (engine) do not come on.
Checked all the main pins (large ones) in the two plugs that go on the ECU, for 12v to gnd, with the ignition on. None of them have 12v.
My OBDII reader says "Linking error". This reader works on another Swift and reads the ECU with no issues.
All indications are pointing to the immobilizer.
Anyone have any suggestions or help? I live 60km from the nearest Suzuki dealer and can't afford the time to get the car there (it will only be my last resort!)
Battery in keyfob is new.
When you press the start/stop button once, Acc comes on. Press s/s again and IGN comes on but the engine management light and the immobilizer light (the little orange key) do not come on. All other normal ones do.
Press s/s to start the car and the engine cranks once. Press again and the engine keeps cranking.
The fuel pump relay does not energize.
Following voltage tests done with ignition 'on':
CKP sensor
- removed and tested with 12vdc. Switching when metallic object is within 1mm
- plug on sensor- gnd yes, no voltage
CMP sensor
- tested working
- plug on sensor- gnd yes, no voltage
MAF sensor
- no voltage
Following checked:
All fuses checked.
Plugs on ECM removed and replace (in case of bad connection).
No visible sign of damage to the wiring loom, like rodent chewing.
Removed the plugs from the CKP, CMP, and MAF to check if one of them might be pulling down the voltage.
Next step, swapped out the relays to see if that is the problem (voltage not getting to the ECM)
Relays in the engine compartment fuse box swapped out one by one with a known good one- no change. Swapped out the relay in the passenger footwell- no change.
Checked ground from battery connection to body, to gearbox, and to engine, all read 0.7ohm.
Found that with the ECU connected or disconnected the engine cranks the same way (as explained above).
When switching the ignition 'on' (pressing start button twice without depressing the clutch) the immobilizer lamp (key) and the engine management lamp (engine) do not come on.
Checked all the main pins (large ones) in the two plugs that go on the ECU, for 12v to gnd, with the ignition on. None of them have 12v.
My OBDII reader says "Linking error". This reader works on another Swift and reads the ECU with no issues.
All indications are pointing to the immobilizer.
Anyone have any suggestions or help? I live 60km from the nearest Suzuki dealer and can't afford the time to get the car there (it will only be my last resort!)
