Keyless Start System

DTC B1158

DTC Detecting Condition and Trouble Area






Circuit Diagram










DTC Confirmation Procedure

1) Push engine switch to change ignition mode to "ON".
2) Operates each power window.

DTC Troubleshooting

1. LIN communication circuit check

Disconnect negative (-) cable at battery.
Disconnect front power window motors, power window master switch and "L01" connectors.
Check for proper terminal connection to front power window motors, power window master switch and "L01" connectors.
If connections are OK, connect negative (-) cable at battery and check the following points.
- Resistance of "A1" circuit: less than 3 ohms
- Resistance between "A1" circuit and ground: infinity
- Resistance between "A1" circuit terminal and each terminal at each front power window motor connector: infinity
- Resistance between "A1" circuit terminal and each terminal at power window master switch connector: infinity
- Voltage of "A1" circuit: 0 - 1 V (with ignition mode of keyless push start system in "ON")

Are they in good condition?
YES -
Go to Step 2.
NO -
Repair or replace defective wire harness.

2. Power window unit check

Check the following points.
- Power window master switch: Service and Repair
- Power window motor: Front Window Regulator Assembly Inspection

Are they in good condition?
YES -
Replace keyless start control module and recheck DTC. Service and Repair
NO -
Replace defective part.