Circuit Inspection: Notes

WARNING: This page is about a different car, the 2017 Kia Niro. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: IGPM System Circuit

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IGPM CONNECTOR INSPECTION SPECIFICATION

Inspection Condition	(+) Probe		(-) Probe		Specification
Inspection Condition	Connector	Terminal	Connector	Terminal	Specification
Ignition "OFF". Disconnect the electrical connector(s) from the concerned component. Ignition "ON".	IGPM connector	1/2/3/4 (B+)	Chassis ground	-	B+
Ignition "ON". Connect the VCI to KDS/GDS. Communicate with IGPM by VCI.	IGPM connector	26 (D-CAN High)	Chassis ground	-	Figures below
	IGPM connector	27 (D-CAN Low)	Chassis ground	-	Figures below

Fig 2: Screen Display - Normal CAN Signal Waveform During Communication Between KDS/GDS And IGPM (100US)

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Fig 3: Screen Display - Normal D-CAN Signal Waveform Perform Vehicle Diagnostics In I-Box

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Fig 4: Screen Display - Abnormal D-CAN Signal Waveform Short To Power In D-CAN Line

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Fig 5: Screen Display - Abnormal D-CAN Signal Waveform Short To Ground In D-CAN Line

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Fig 6: Screen Display - Abnormal D-CAN Signal Waveform Short To Each Other In D-CAN Line

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Good	Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage. Repair or replace as necessary and go to "VERIFICATION OF REPAIR " procedure.
No Good	Repair open or short in D-CAN line depending on the symptoms and then go to "VERIFICATION OF REPAIR " procedure. Disconnect (-) terminal of the auxiliary battery and wait about five minutes for initializing IGPM, and then carefully re-do this troubleshooting guide steps. Go to "CAN Resistance Inspection" procedure.