Code 42*1 IG1 (B) Power Supply System

Code No.42 IG1 (B) power supply circuit


This code is output when the voltage between the IG1 (B) terminal and ground continues to be lower than a predetermined value for five seconds.

When the normal state is restored for a continuous period of 1±0.2 second, code No.42 is automatically cleared, and the SRS warning light goes out.

Probable cause of trouble

^ Defective harness, connector

^ Defective SDU

Diagnostic Chart:

Troubleshooting Diagram








Caution

1. After the ignition switch has been placed at the LOCK position and the negative (-) terminal of the battery has been disconnected, wait for more than 60 seconds before starting work. Wind a tape around the disconnected (-) terminal for insulation.

2. To unlock the SDU connector, put a flat tip screwdriver on the lock spring (metallic portion) of the lock lever as shown and press it horizontally toward the inside of the unit. In this case, do not force the lock lever up. Do not put the flat tip screwdriver in the clearance between the lock lever and lock spring (metallic portion).