BLEEDING BRAKE SYSTEM
Note. For specific brake bleeding procedure, see ANTI-LOCK - SC300 & SC400 - WITH TRACTION CONTROL article.
TRAC SYSTEM DOES NOT OPERATE
| CAUTION | If ABS/TRAC ECU replacement is instructed in following testing, always ensure ABS/TRAC ECU connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ABS/TRAC ECU malfunction. |
Ensure no DTCs are present. See RETRIEVING DIAGNOSTIC TROUBLE CODES under DIAGNOSIS & TESTING. Inspect IG power supply circuit. See DTC 41: IG POWER SUPPLY CIRCUIT in ANTI-LOCK - SC300 & SC400 - WITH TRACTION CONTROL article. Inspect hydraulic lines for leakage. Repair as needed. Inspect speed sensor circuit(s). See DTC 31-34: SPEED SENSOR CIRCUIT in ANTI-LOCK - SC300 & SC400 - WITH TRACTION CONTROL article. If all preceding tests are okay, replace ABS/TRAC ECU.
SLIP INDICATOR LIGHT MALFUNCTION
Inspect slip indicator light circuit. See SLIP INDICATOR LIGHT CIRCUIT under SYSTEM TESTS. Repair as needed.
TRAC OFF INDICATOR LIGHT MALFUNCTION
| CAUTION | If ABS/TRAC ECU replacement is instructed in following testing, always ensure ABS/TRAC ECU connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ABS/TRAC ECU malfunction. |
Inspect TRAC OFF indicator light circuit. See TRAC OFF INDICATOR LIGHT, TRAC CUT SWITCH CIRCUIT under SYSTEM TESTS. Repair as needed. If circuit is okay, inspect TRAC cut switch circuit. If all preceding tests are okay, replace ABS/TRAC ECU.
DTCS CANNOT BE RETRIEVED
| CAUTION | If ABS/TRAC ECU replacement is instructed in following testing, always ensure ABS/TRAC ECU connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ABS/TRAC ECU malfunction. |
Inspect TRAC OFF indicator light circuit. Repair as needed. See TRAC OFF INDICATOR LIGHT, TRAC CUT SWITCH CIRCUIT under SYSTEM TESTS. If TRAC OFF indicator light circuit is okay, inspect Tc terminal circuit. See Tc TERMINAL CIRCUIT under SYSTEM TESTS. If all preceding tests are okay, replace ABS/TRAC ECU.
SLIP (TRAC) INDICATOR LIGHT CIRCUIT
Note. Slip indicator light is identified as TRAC light in wiring diagrams. For circuit identification and wire colors, see WIRING DIAGRAMS .
Tc TERMINAL CIRCUIT
| CAUTION | If ABS/TRAC ECU replacement is instructed in following testing, always ensure ABS/TRAC ECU connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ABS/TRAC ECU malfunction. |
Note. For circuit identification and wire colors, see WIRING DIAGRAMS .
TRAC OFF INDICATOR LIGHT, TRAC CUT SWITCH CIRCUIT
Note. For circuit identification and wire colors, see WIRING DIAGRAMS .