Leaf Button Malfunction

Leaf Button Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Circuit/System Description

The Leaf button is located in the Radio/HVAC Controls assembly and is used to change between the Power Flow, Charging, and Energy Information views of the Info Display Module.

The Radio/HVAC Controls provides 5 volts to the Leaf button. The Leaf button is a momentary contact switch that pulls the signal low to ground when pushed. When the Radio/HVAC Controls sees the Leaf button transition, it sends the request via serial data to the Info Display Module.

Reference Information

Schematic Reference

Instrument Cluster Schematics Instrument Cluster Schematics

Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1

Description and Operation

Driver Information Center (DIC) Description and Operation Driver Information Center (DIC)

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Programming and Relearning for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify the Info Display Module display changes when pressing the Leaf button.

• If the Info Display Module display does not change
Refer to Circuit/System Testing

• If the Info Display Module display changes

3. All OK.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S126 Drive Mode Select Switch, ignition ON.

2. Test for 4.8-5.2 V between the signal circuit terminal 2 and ground.

• If less than 4.8 V

1. Ignition OFF, disconnect the harness connector at the A20 Radio/HVAC Controls.

2. Test for infinite resistance between the signal circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance

3. Test for less than 2 ohms in the signal circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the A20 Radio/HVAC Controls.

• If greater than 5.2 V

1. Ignition OFF, disconnect the harness connector at the A20 Radio/HVAC Controls, ignition ON.

2. Test for less than 1 V between the signal circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.

• If less than 1 V, replace the A20 Radio/HVAC Controls.

• If between 4.8-5.2 V

3. Test for less than 10 ohms between the ground circuit terminal 4 and ground.

• If 10 ohms or greater
Repair the open/high resistance in the circuit

• If less than 10 ohms

4. Replace the S126 Drive Mode Select Switch.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Control Module References Programming and Relearning for the Radio/HVAC Controls or Drive Mode Select Switch (part of Radio/HVAC Controls) replacement, programming and setup