Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Jeep >> 1992 >> Cherokee Limited >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Body Control Computer >> Self-Diagnostic Tests >> Test 11A - Bus (+) & (-) Shorted Together On Bus

Test 11A - Bus (+) & (-) Shorted Together On Bus

NOTE: For connector terminal identification, see BODY CONTROL SYSTEM CONNECTORS under DIAGNOSTIC PROCEDURE. For wiring diagrams, see appropriate chassis wiring diagram in the WIRING DIAGRAMS Section.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
NOTE: A common cause of this message is a low battery condition
  1. Using DRB-II, answer whether a module is present or not. Disconnect Anti-Lock Brake System (ABS) controller connector (if equipped). Controller is located to right of steering column.
  2. Check connector condition, and clean or repair connector as necessary. If DRB-II does not display BUS (+) and BUS (-) SHORTED TOGETHER, replace ABS controller. Perform VERIFICATION TEST. If DRB-II displays BUS (+) and BUS (-) SHORTED TOGETHER, disconnect Single Board Engine Controller (SBEC) connector.
  3. If DRB-II does not display BUS (+) and BUS (-) SHORTED TOGETHER, replace SBEC. Perform VERIFICATION TEST. If DRB-II displays BUS (+) and BUS (-) SHORTED TOGETHER, disconnect compass/mini-trip module connector (if equipped). Connector is located in overhead console. If DRB-II does not display BUS (+) and BUS (-) SHORTED TOGETHER, replace compass/mini-trip module. Perform VERIFICATION TEST.
  4. If DRB-II displays BUS (+) and BUS (-) SHORTED TOGETHER, disconnect vehicle theft alarm module (if equipped). Module is located to right of steering column. Check connector condition and clean or repair connector as necessary. If DRB-II does not display BUS (+) and BUS (-) SHORTED TOGETHER, replace vehicle theft alarm module. Perform VERIFICATION TEST.
  5. If DRB-II displays BUS (+) and BUS (-) SHORTED TOGETHER, disconnect automatic temperature controller connector (if equipped). If DRB-II does not display BUS (+) and BUS (-) SHORTED TOGETHER, replace automatic temperature controller. Perform VERIFICATION TEST.
  6. If DRB-II displays BUS (+) and BUS (-) SHORTED TOGETHER, disconnect DRB-II. Using an external ohmmeter, check resistance between terminals No. 1 (Violet/Brown wire) and No. 6 (White/Black wire) of CCD bus diagnostic connector.
  7. If resistance is less than 20 ohms, repair short between White/Black or White/Gray wire and Violet/Black wire. Perform VERIFICATION TEST. If resistance is more than 20 ohms, test DRB-II. Refer to TEST 5A.
scientia non olet · About Mike's Workshop Manuals