Diagnostic Aids

• When instrument cluster detects low voltage at ignition 0 voltage circuit, instrument cluster will not communicate with scan tool. Odometer and PRNDL displays will not illuminate. Odometer will display if trip reset switch is pressed, and instrument cluster will communicate with scan tool until trip reset switch is released
• DTC B1367 can only be read by scan tool as a history code once fault is removed
• An intermittent condition is likely to be caused by an open condition in ignition 0 voltage circuit

Refer to, TEST D: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE under SYSTEM TESTS in BODY CONTROL MODULES - ASTRO & SAFARI article.