LS V8-3.9L VIN A (2003)
Test L8-L9
Normal Operation
The navigation system module communicates with the diagnostic tool through the SCP communications network circuits 4-E017 (GY/BK) and
5-E617 (BU/YE). If one of the bus wires becomes shorted to ground or voltage, or if some but not all termination resistors are lost, communications
can continue. Check circuits 4-EG17 (GY/BK) and 5-EG17 (BU/YE) between the navigation system module C4209 and the data link connector
(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-E617
(GY/BK) and 5-EG17 (BU/YE), damage to the DLC C251, damage to the navigation system module C4209, or a problem in the interior auxiliary
junction box (AJB) C283c, C283d, joint connector No.5 C427 or joint connector No.4 C223.
Possible Causes
-
circuits 4-EGl7 (GY/BK) and 5-EG17 (BU/YE) shorted to ground or open
-
navigation system module C4209
-
interior AJB C283c C283d
-
joint connector No.4 C223
-
joint connector No.5 C427
-
DLC C251
-
navigation system module
Test M
PINPOINT TEST M: THE DRIVER TEMPERATURE CONTROLLED SEAT MODULE DOES NOT RESPOND TO THE DIAGNOSTIC
TOOL