Hyundai Elantra: Automatic Transaxle Control System / Inhibitor Switch Troubleshooting

Fault Diagnosis
Fault Diagnosis for Symptom
Major Symptom
Expected Cause
Items to Check and Measures
Shift lever inoperable
Faulty shift cable tension
Adjust shift cable tension
(refer to "Automatic Transaxle System – Inhibitor Switch")
Faulty shift cable assembly/connection
Check manual control valve assembly and re-assemble if necessary.
Faulty shift cable bracket installation
Check cable installation on the shift lever assembly and repair if necessary.
Shock when shifting to and from D/R

Motor run-up when shifting to and from D/R
Faulty inhibitor switch "N" setting
Use the "N" setting jig and adjust the "N" setting.
(refer to "Automatic Transaxle System – Inhibitor Switch")
Faulty oil pressure in the valve body.
Replace valve body assembly or inspect/replace transaxle assembly
Faulty engine start

Current gear not indicated in the Cluster

Warning Lamp ON

Engine stall while stopped

Creeping not possible

Auto parking release disabled
Faulty CAN terminating resistance/circuit
Check PCU/battery management system module.
Check PCU wiring connector connection.
Faulty power supply (IG.1) to inhibitor switch circuit
Check for gap on the junction box power terminal in the engine compartment and fuse (TCU2) connection. Repair terminal or exchange junction box if necessary.
Faulty inhibitor switch circuit fuse
Check fuse and junction box terminal, and repair.
Faulty inhibitor switch wiring connector
Check for foreign substance in the wiring connector, and check for gap on the terminal.
Check sealing on unused pin, and check for corrosion on the terminal.
Faulty reverse lamp circuit
Check reverse lamp ground, and reassemble if necessary.
Faulty inhibitor switch wiring ground
Check wiring ground, and reassemble if necessary.
Faulty inhibitor switch circuit
(unused code)
Inspect in accordance with the inspection flow, then replace inhibitor switch if necessary.
Faulty inhibitor switch operation
(faulty mid-range)
Inspect in accordance with the inspection flow, then replace inhibitor switch if necessary.

Inhibitor Switch Schematic Diagrams
Circuit Diagram ...

Inhibitor Switch Repair procedures
Inspection Inspection flow of the inhibitor switch Items to check 1. Inspect DTC code. 2. Inspect whether N setting matches. A. Adjust N setting (refer to automatic transmission system ...

Other information:

Hyundai Elantra AD (2016-2020) Service Manual: Troubleshooting
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Hyundai Elantra AD (2016-2020) Service Manual: Inside Rear View Mirror Repair procedures
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