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HOMESERVICE MANUALSSAAB19959000 CS, STANDARDREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLTRACTION CONTROL SYSTEM - 2.3L TURBODIAGNOSIS & TESTINGRETRIEVING CODES (TC/ABS SYSTEM)
1995 Saab 9000 CS, Standard

Retrieving Codes (TC/Abs System)

1995 Saab 9000 CS, StandardSECTION Retrieving Codes (TC/Abs System)
NOTE: To retrieve ETS codes, see RETRIEVING CODES (ETS SYSTEM)  .
  1. Codes for TC/ABS system can only be retrieved with Saab Intelligent Tester (ISAT-86 10 651). Green Diagnostic connector is located under passenger's front seat. Saab Intelligent Tester (ISAT) can also send system command codes for activating system functions and clearing fault codes.
  2. Ensure ignition switch is in RUN position. ISAT system number for TC/ABS system is No. 3. Always retrieve and note all stored fault codes before disconnecting battery or TC/ABS ECU.
  3. If communication cannot be established between ISAT and TC, check wiring between TC/ABS ECU terminals No. 23 (Yellow wire) and No. 42 (Blue wire), and Green diagnostic connector. Ensure power feed and ground circuits to diagnostic connector are good and connector terminals are not damaged. In addition, some faults will disable ISAT communications abilities of TC/ABS ECU.
  4. After fault codes stored in TC/ABS ECU have been transferred to ISAT, diagnosis function is completed. It is now necessary to enter any command codes which apply to the problem present. It may be helpful to enter all command codes to determine whether certain signals and components are correct.
  5. Ensure ignition is off before disconnecting TC/ABS ECU connector. Before tracing faults on a system, always start by checking ground and voltage circuits for TC/ABS ECU. Check all connectors by unplugging and plugging them back together. Start engine or drive vehicle again to check whether fault or faults return.
  6. When first detected, a fault will be assigned a permanent fault code. If fault later disappears, fault will be intermittent. All signals around 12-volt level are proportional to battery voltage. These levels should be used as a rough guide. Zero voltage signal levels indicate ground.
  7. If ISAT command codes are being used to test system while car is being driven, communication between ISAT and TC/ABS ECU will be broken if vehicle speed exceeds 12 MPH. If no fault codes can be read, even though warning lights are on, check warning light terminals No. 8 (Blue wire) and No. 51 (Brown wire) for a short circuit to voltage.
  8. Because TC/ABS ECU connector on wiring harness is a molded plug, test probes cannot be connected to back of connector. Breakout Box (8611006) with Test Lead Set (8611030) should be connected between TC/ABS ECU and connector. See Fig 1 . Many tests require TC/ABS ECU to be disconnected.
Fig 1: Identifying Breakout Box & Test Lead Set
G93F84959Courtesy of SAAB-SCANIA OF AMERICA, INC.
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