Test I

PINPOINT TEST I: THE DRIVER SEAT MODULE (DSM) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

Test I1-I2:

Test I2-I3:

Test I4-I5:

Test I5-I6:

Test I7:

Normal Operation
The DSM communicates with the diagnostic tool through the SCP communications network circuits 4-AH80 (GY/WH) and 5-AH80 (BU/OG). If circuit 4-AH80 (GY/WH) or 5-AH80 (BU/OG) becomes open or shorted to ground, communications to that module will not be possible. Check circuits 4-AH80 (GY/WH) and 5-AH80 (BU/OG) between the DSM C341c and the DLC C251. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms, there is either an open in circuit 4-AH80 (GY/WH) or 5-AH80 (BU/OG), damage to the DLC C251, damage to the DSM C341c, or a problem with in-line interior auxiliary junction box (AJB) C283c, C283d or joint connector No.4 C223.

Possible Causes
- circuit 4-AH80 (GY/WH) or 5-AH80 (BU/OG) shorted to ground or open C341c
- interior AJB C283c, C283d
- joint connector No.4 C223
- DLC C251
- DSM