Module Communications Network (2003.5-09)

• Description and Operation
  • Communications Network
• Diagnosis and Testing
  • Communications Network
    • Principles of Operation
    • Inspection and Verification
    • Power Supply and Ground table
    • Driver Information Chart
    • Default mode Definitions
      • Limp-Home Mode
      • Limp-Home Unavailable
      • Reverse Throttle Progression
      • Engine Speed Limited
      • High Idle
      • Safety Redundancy
    • Diagnostic Trouble Code (DTC) Index
  • Pinpoint Tests
    • PINPOINT TEST G239843p1: CHECK THE CONTROLLER AREA NETWORK FOR OPEN CIRCUIT
      • G239843t1: CHECK THE CAN NETWORK FOR CONTINUITY
      • G239843t2: CHECK THE REAR CLIMATE CONTROL MODULE (RCCM) CAN + CIRCUIT FOR CONTINUITY
      • G239843t3: CHECK THE REAR CLIMATE CONTROL MODULE (RCCM) CAN - CIRCUIT FOR CONTINUITY
      • G239843t4: CHECK THE YAW RATE SENSOR CAN + CIRCUIT FOR CONTINUITY
      • G239843t5: CHECK THE YAW RATE SENSOR CAN - CIRCUIT FOR CONTINUITY
      • G239843t6: CHECK THE ASCCM CAN + CIRCUIT FOR CONTINUITY
      • G239843t7: CHECK THE ASCCM CAN - CIRCUIT FOR CONTINUITY
      • G239843t8: CHECK THE TCM CAN + CIRCUIT FOR CONTINUITY
      • G239843t9: CHECK THE TCM CAN - CIRCUIT FOR CONTINUITY
      • G239843t10: CHECK THE CAN + CIRCUIT BETWEEN THE DLC AND THE INSTRUMENT CLUSTER (IC) FOR CONTINUITY
      • G239843t11: CHECK THE CAN - CIRCUIT BETWEEN THE DLC AND THE INSTRUMENT CLUSTER (IC) FOR CONTINUITY
      • G239843t12: CHECK THE CAN + CIRCUIT BETWEEN THE INSTRUMENT CLUSTER (IC) AND THE AIR SUSPENSION MODULE (ASU) FOR CONTINUITY
      • G239843t13: CHECK THE CAN - CIRCUIT BETWEEN THE INSTRUMENT CLUSTER (IC) AND THE AIR SUSPENSION MODULE (ASU) FOR CONTINUITY
      • G239843t14: CHECK THE CAN + CIRCUIT BETWEEN THE INSTRUMENT CLUSTER (IC) AND THE J-GATE MODULE (JGM) FOR CONTINUITY
      • G239843t15: CHECK THE CAN - CIRCUIT BETWEEN THE INSTRUMENT CLUSTER (IC) AND THE J-GATE MODULE (JGM) FOR CONTINUITY
      • G239843t16: CHECK THE CAN + CIRCUIT BETWEEN THE J-GATE MODULE (JGM) AND THE AIR CONDITIONING MODULE (A/CCM) FOR CONTINUITY
      • G239843t17: CHECK THE CAN - CIRCUIT BETWEEN THE J-GATE MODULE (JGM) AND THE AIR CONDITIONING MODULE (A/CCM) FOR CONTINUITY
      • G239843t18: CHECK THE CAN + CIRCUIT BETWEEN THE AIR CONDITIONING MODULE (A/CCM) AND THE ABS CONTROL MODULE (ABSCM) FOR CONTINUITY
      • G239843t19: CHECK THE CAN - CIRCUIT BETWEEN THE AIR CONDITIONING MODULE (A/CCM) AND THE ABS CONTROL MODULE (ABSCM) FOR CONTINUITY
      • G239843t20: CHECK THE CAN + CIRCUIT BETWEEN THE ABS CONTROL MODULE (ABSCM) AND THE ENGINE CONTROL MODULE (ECM) FOR CONTINUITY
      • G239843t21: CHECK THE CAN - CIRCUIT BETWEEN THE ABS CONTROL MODULE (ABSCM) AND THE ENGINE CONTROL MODULE (ECM) FOR CONTINUITY
    • PINPOINT TEST G239843p2: CHECK THE CONTROLLER AREA NETWORK FOR SHORT CIRCUIT
      • G239843t22: CHECK THE CAN + FOR SHORT CIRCUIT TO B +
      • G239843t23: CHECK THE CAN + FOR SHORT CIRCUIT TO IGNITION SWITCHED +
      • G239843t24: CHECK THE CAN + FOR SHORT CIRCUIT TO GROUND
      • G239843t25: CHECK THE CAN - FOR SHORT CIRCUIT TO B +
      • G239843t26: CHECK THE CAN - FOR SHORT CIRCUIT TO IGNITION SWITCHED +
      • G239843t27: CHECK THE CAN - FOR SHORT CIRCUIT TO GROUND
    • PINPOINT TEST G239843p3: CHECK THE SCP NETWORK
      • G239843t28: CHECK FOR CORRECT BUS TERMINATION IN THE SCP + NETWORK
      • G239843t29: CHECK THE SCP + FOR SHORT CIRCUIT TO BATTERY
      • G239843t30: CHECK THE SCP + FOR SHORT CIRCUIT TO IGNITION +
      • G239843t31: CHECK THE SCP + FOR SHORT CIRCUIT TO GROUND
      • G239843t32: CHECK THE SCP - FOR SHORT CIRCUIT TO BATTERY
      • G239843t33: CHECK THE SCP - FOR SHORT CIRCUIT TO IGNITION +
      • G239843t34: CHECK THE SCP - FOR SHORT CIRCUIT TO GROUND
      • G239843t35: CHECK FOR SHORT CIRCUIT BETWEEN SCP + AND SCP -
    • PINPOINT TEST G239843p4: CHECK THE ISO NETWORK CIRCUIT
      • G239843t36: CHECK THE TCM ISO CIRCUIT FOR SHORT TO BATTERY +
      • G239843t37: CHECK THE TCM ISO CIRCUIT FOR SHORT TO IGNITION +
      • G239843t38: CHECK THE TCM ISO CIRCUIT FOR SHORT TO GROUND
      • G239843t39: CHECK THE TCM ISO CIRCUIT FOR HIGH RESISTANCE
      • G239843t40: CHECK THE ISO CIRCUIT FOR SHORT TO BATTERY +
      • G239843t41: CHECK THE ISO CIRCUIT FOR SHORT TO IGNITION +
      • G239843t42: CHECK THE ISO CIRCUIT FOR SHORT TO GROUND
      • G239843t43: CHECK THE ISO CIRCUIT BETWEEN THE RIGHT-HAND HID AND THE DLC FOR HIGH RESISTANCE
      • G239843t44: CHECK THE ISO CIRCUIT BETWEEN THE LEFT-HAND HID AND THE DLC FOR HIGH RESISTANCE
      • G239843t45: CHECK THE ISO CIRCUIT BETWEEN THE ECM AND THE DLC FOR HIGH RESISTANCE
      • G239843t46: CHECK THE ISO CIRCUIT BETWEEN THE PARKING AID MODULE AND THE DLC FOR HIGH RESISTANCE
      • G239843t47: CHECK THE ISO CIRCUIT BETWEEN THE INTRUSION SENSOR AND THE DLC FOR HIGH RESISTANCE
      • G239843t48: CHECK THE ISO CIRCUIT BETWEEN THE AIRBAG MODULE AND THE DLC FOR HIGH RESISTANCE
    • PINPOINT TEST G239843p5: ONE OR MORE D2B MODULES NOT RESPONDING. WAKE-UP SIGNAL FAULT
      • G239843t255: CHECK THE WAKE-UP SIGNAL TO THE CD CHANGER
      • G239843t256: CHECK THE WAKE-UP SIGNAL TO THE PHONE MODULE
      • G239843t257: CHECK THE WAKE-UP SIGNAL TO THE VOICE ACTIVATED CONTROL MODULE
      • G239843t258: CHECK THE WAKE-UP SIGNAL TO THE NAVIGATION COMPUTER
      • G239843t259: CHECK THE WAKE-UP SIGNAL TO THE AMP
      • G239843t351: CHECK THE WAKE-UP SIGNAL TO THE REAR ENTERTAINMENT MODULE
    • PINPOINT TEST G239843p24: U2003; COMPACT DISC CHANGER NOT RESPONDING
      • G239843t233: CHECK THE CD CHANGER MODULE, USING THE OPTICAL BUS TESTER
      • G239843t234: CHECK FOR DTC U2602 OR U2603
    • PINPOINT TEST G239843p25: U2008; PHONE MODULE NOT RESPONDING
      • G239843t235: CHECK PHONE MODULE, USING OPTICAL BUS TESTER
      • G239843t236: CHECK FOR DTC U2602 OR U2603
    • PINPOINT TEST G239843p26: U2019; VOICE ACTIVATED CONTROL MODULE (VACM) NOT RESPONDING
      • G239843t237: CHECK VOICE CONTROL MODULE USING OPTICAL BUS TESTER
      • G239843t238: CHECK FOR DTC U2602 OR U2603
    • PINPOINT TEST G239843p27: U2613; NAVIGATION CONTROL MODULE NOT RESPONDING
      • G239843t239: CHECK NAVIGATION CONTROL MODULE, USING OPTICAL BUS TESTER
      • G239843t240: CHECK FOR DTC U2602 OR U2603
    • PINPOINT TEST G239843p28: U2614; AMPLIFIER NOT RESPONDING
      • G239843t241: CHECK AMPLIFIER USING OPTICAL BUS TESTER
      • G239843t242: CHECK FOR DTC U2602 OR U2603
    • PINPOINT TEST G239843p43: U2615; REAR ENTERTAINMENT MODULE NOT RESPONDING
      • G239843t349: CHECK REAR ENTERTAINMENT MODULE USING OPTICAL BUS TESTER
      • G239843t350: CHECK FOR DTC U2602 OR U2603
    • PINPOINT TEST G239843p29: U2602: BREAK IN OPTICAL HARNESS FROM AUDIO CONTROL MODULE. (TRANSMITTER)
      • G239843t243: CHECK FIBRE OPTIC LEAD BETWEEN LUGGAGE COMPARTMENT JOINT AND CD CHANGER
      • G239843t244: CHECK CABIN FIBRE OPTIC HARNESS
      • G239843t245: CHECK FIBRE OPTIC LEAD BETWEEN ASHTRAY AND AUDIO CONTROL MODULE
      • G239843t246: CHECK THE AUDIO CONTROL MODULE
      • G239843t247: CHECK THE FIBRE OPTIC LEAD FROM THE CD CHANGER TO THE PHONE MODULE
      • G239843t248: CHECK THE FIBRE OPTIC LEAD FROM THE PHONE MODULE TO THE VOICE MODULE
      • G239843t354: CHECK THE FIBRE OPTIC LEAD FROM THE VOICE MODULE TO THE REAR ENTERTAINMENT MODULE
      • G239843t355: CHECK THE FIBRE OPTIC LEAD FROM THE REAR ENTERTAINMENT MODULE TO THE NAVIGATION COMPUTER
      • G239843t249: CHECK THE FIBRE OPTIC LEAD FROM THE VOICE MODULE TO THE NAVIGATION COMPUTER
      • G239843t250: CHECK THE FIBRE OPTIC LEAD FROM THE NAVIGATION COMPUTER TO THE AMP
    • PINPOINT TEST G239843p30: U2603: BREAK IN OPTICAL HARNESS TO AUDIO CONTROL MODULE. (RECEIVER)
      • G239843t251: CHECK FIBRE OPTIC LEAD BETWEEN LUGGAGE COMPARTMENT JOINT AND AMPLIFIER
      • G239843t252: CHECK CABIN FIBRE OPTIC HARNESS
      • G239843t253: CHECK FIBRE OPTIC LEAD BETWEEN ASHTRAY AND AUDIO CONTROL MODULE
      • G239843t254: CHECK THE AUDIO CONTROL MODULE
    • PINPOINT TEST G239843p6: CHECK THE SUPPLIES AND GROUNDS TO THE CD CHANGER
      • G239843t49: CHECK THE PERMANENT SUPPLY TO THE CD CHANGER
      • G239843t50: CHECK THE GROUND TO THE CD CHANGER
    • PINPOINT TEST G239843p7: CHECK THE SUPPLIES AND GROUNDS TO THE AMPLIFIER
      • G239843t51: CHECK THE PERMANENT SUPPLY TO THE AMPLIFIER
      • G239843t52: CHECK THE GROUND TO THE AMPLIFIER
    • PINPOINT TEST G239843p8: CHECK THE SUPPLIES AND GROUNDS TO THE CELLULAR PHONE MODULE
      • G239843t53: CHECK THE PERMANENT SUPPLY TO THE PHONE MODULE
      • G239843t54: CHECK THE ACCESSORY SUPPLY TO THE PHONE MODULE
      • G239843t55: CHECK THE IGNITION SUPPLY TO THE PHONE MODULE
      • G239843t56: CHECK THE GROUND TO THE PHONE MODULE
    • PINPOINT TEST G239843p9: CHECK THE SUPPLIES AND GROUNDS TO THE VOICE CONTROL MODULE
      • G239843t57: CHECK THE PERMANENT SUPPLY TO THE VACM
      • G239843t58: CHECK THE ACCESSORY SUPPLY TO THE VACM
      • G239843t59: CHECK THE IGNITION SUPPLY TO THE VACM
      • G239843t60: CHECK THE GROUND TO THE VACM
    • PINPOINT TEST G239843p10: CHECK THE SUPPLIES AND GROUNDS TO THE REAR ENTERTAINMENT CONTROL PANEL
      • G239843t61: CHECK THE PERMANENT SUPPLY TO THE REAR ENTERTAINMENT CONTROL PANEL
      • G239843t62: CHECK THE GROUND TO THE REAR ENTERTAINMENT CONTROL PANEL
    • PINPOINT TEST G239843p11: CHECK THE SUPPLIES AND GROUNDS TO THE NAVIGATION SYSTEM MODULE
      • G239843t63: CHECK THE PERMANENT SUPPLY TO THE NSM
      • G239843t64: CHECK THE ACCESSORY SUPPLY TO THE NSM
      • G239843t65: CHECK THE GROUND TO THE NSM
    • PINPOINT TEST G239843p12: CHECK THE SUPPLIES AND GROUNDS TO THE ICE HEAD UNIT
      • G239843t66: CHECK THE PERMANENT SUPPLY TO THE HU
      • G239843t67: CHECK THE ACCESSORY SUPPLY TO THE HU
      • G239843t68: CHECK THE GROUND TO THE HU
    • PINPOINT TEST G239843p13: CHECK THE SUPPLIES AND GROUNDS TO THE FRONT ELECTRONIC MODULE
      • G239843t69: CHECK THE PERMANENT SUPPLY TO THE FEM
      • G239843t70: CHECK THE SWITCHED SYSTEM POWER (SSP) SUPPLY TO THE FEM
      • G239843t71: CHECK THE GROUND TO THE FEM
    • PINPOINT TEST G239843p14: CHECK THE SUPPLIES AND GROUNDS TO THE REAR ELECTRONIC MODULE
      • G239843t72: CHECK THE PERMANENT SUPPLY TO THE REM
      • G239843t73: CHECK THE SWITCHED SYSTEM POWER (SSP) SUPPLY TO THE REM
      • G239843t74: CHECK THE GROUND TO THE REM
    • PINPOINT TEST G239843p15: CHECK THE SUPPLIES AND GROUNDS TO THE REAR MEMORY MODULE (RMM)
      • G239843t75: CHECK THE PERMANENT SUPPLY (1) TO THE REM
      • G239843t76: CHECK THE PERMANENT SUPPLY (2) TO THE REM
      • G239843t77: CHECK THE SWITCHED SYSTEM POWER (SSP) SUPPLY TO THE RMM
      • G239843t78: CHECK THE LOGIC GROUND TO THE RMM
      • G239843t79: CHECK THE MOTOR GROUNDS TO THE RMM
    • PINPOINT TEST G239843p16: CHECK THE SUPPLIES AND GROUNDS TO THE ELECTRONIC PARK BRAKE MODULE (EPB)
      • G239843t80: CHECK THE PERMANENT SUPPLY TO THE EPB
      • G239843t81: CHECK THE GROUND TO THE EPB
    • PINPOINT TEST G239843p17: CHECK THE SUPPLIES AND GROUNDS TO THE DRIVER DOOR CONTROL MODULE (DDCM)
      • G239843t82: CHECK THE PERMANENT SUPPLY TO THE DDCM
      • G239843t83: CHECK THE SWITCHED SYSTEM POWER (SSP) SUPPLY TO THE DDCM
    • PINPOINT TEST G239843p18: CHECK THE SUPPLIES AND GROUNDS TO THE DRIVER SEAT CONTROL MODULE (DSCM)
      • G239843t84: CHECK THE PERMANENT SUPPLY (1) TO THE DSCM
      • G239843t85: CHECK THE PERMANENT SUPPLY (2) TO THE DSCM
      • G239843t86: CHECK THE SWITCHED SYSTEM POWER (SSP) SUPPLY TO THE DSCM
    • PINPOINT TEST G239843p19: CHECK THE SUPPLIES AND GROUNDS TO THE ENGINE CONTROL MODULE (ECM)
      • G239843t87: CHECK THE PERMANENT SUPPLY TO THE ECM
      • G239843t88: CHECK THE EMS SUPPLY TO THE ECM
      • G239843t89: CHECK THE POWER GROUND TO THE ECM
    • PINPOINT TEST G239843p20: CHECK THE SUPPLIES AND GROUNDS TO THE PARKING AID CONTROL MODULE (PACM)
      • G239843t90: CHECK THE IGNITION SUPPLY TO THE PACM
      • G239843t91: CHECK THE GROUND TO THE PACM
    • PINPOINT TEST G239843p21: CHECK THE SUPPLIES AND GROUNDS TO THE INTRUSION SENSOR
      • G239843t92: CHECK THE POWER SUPPLY TO THE INTRUSION SENSOR
      • G239843t93: CHECK THE GROUND TO THE INTRUSION SENSOR
    • PINPOINT TEST G239843p22: CHECK THE SUPPLIES AND GROUNDS TO THE RESTRAINTS CONTROL MODULE (RCM)
      • G239843t94: CHECK THE PERMANENT SUPPLY TO THE RCM
      • G239843t95: CHECK THE GROUND TO THE RCM
    • PINPOINT TEST G239843p23: CHECK THE SUPPLIES AND GROUNDS TO THE INSTRUMENT CLUSTER (IC)
      • G239843t96: CHECK THE PERMANENT SUPPLY TO THE IC
      • G239843t97: CHECK THE ACCESSORY SUPPLY TO THE IC
      • G239843t98: CHECK THE IGNITION SUPPLY (1) TO THE IC
      • G239843t99: CHECK THE IGNITION SUPPLY (2) TO THE IC
      • G239843t100: CHECK THE GROUND TO THE IC
    • PINPOINT TEST G239843p31: CHECK THE SUPPLIES AND GROUNDS TO THE J-GATE MODULE (JGM)
      • G239843t101: CHECK THE IGNITION SUPPLY TO THE JGM
      • G239843t102: CHECK THE GROUND TO THE JGM
    • PINPOINT TEST G239843p32: CHECK THE SUPPLIES AND GROUNDS TO THE AIR CONDITIONING CONTROL MODULE (A/CCM)
      • G239843t103: CHECK THE IGNITION SUPPLY TO THE A/CCM
      • G239843t104: CHECK THE SWITCHED SYSTEM POWER (SSP) SUPPLY TO THE A/CCM
      • G239843t105: CHECK THE SYSTEM GROUND TO THE A/CCM
    • PINPOINT TEST G239843p33: CHECK THE SUPPLIES AND GROUNDS TO THE DYNAMIC STABILITY CONTROL MODULE (DSCCM)
      • G239843t106: CHECK THE PERMANENT SUPPLIES TO THE DSCCM
      • G239843t107: CHECK THE IGNITION SUPPLY TO THE DSCCM
    • PINPOINT TEST G239843p34: CHECK THE SUPPLIES AND GROUNDS TO THE TRANSMISSION CONTROL MODULE (TCM)
      • G239843t108: CHECK THE PERMANENT SUPPLY TO THE TCM
      • G239843t109: CHECK THE IGNITION SUPPLY TO THE TCM
      • G239843t110: CHECK THE GROUND TO THE TCM
    • PINPOINT TEST G239843p35: CHECK THE SUPPLIES AND GROUNDS TO THE ADAPTIVE SPEED CONTROL MODULE (ASCCM)
      • G239843t111: CHECK THE IGNITION SUPPLY TO THE ASCCM
      • G239843t112: CHECK THE SWITCHED SYSTEM POWER (SSP) SUPPLY TO THE ASCCM
      • G239843t113: CHECK THE GROUND TO THE ASCCM
    • PINPOINT TEST G239843p36: CHECK THE SUPPLIES AND GROUNDS TO THE AIR SUSPENSION CONTROL MODULE (ASU)
      • G239843t114: CHECK THE PERMANENT SUPPLY TO THE ASU
      • G239843t115: CHECK THE SWITCHED SYSTEM POWER (SSP) SUPPLY TO THE ASU
      • G239843t116: CHECK THE GROUND TO THE ASU
    • PINPOINT TEST G239843p37: U2022; CONTROL PANEL COMMUNICATIONS ERROR
      • G239843t117: CHECK THE CONTROL PANEL CLOCK CIRCUIT FOR HIGH RESISTANCE
      • G239843t118: CHECK THE CONTROL PANEL CLOCK CIRCUIT FOR SHORT TO GROUND
      • G239843t119: CHECK THE CONTROL PANEL CLOCK CIRCUIT FOR SHORT TO B+
      • G239843t120: CHECK THE CONTROL PANEL DATA CIRCUIT FOR HIGH RESISTANCE
      • G239843t121: CHECK THE CONTROL PANEL DATA CIRCUIT FOR SHORT TO GROUND
      • G239843t122: CHECK THE CONTROL PANEL DATA CIRCUIT FOR SHORT TO B+