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DTC P0601: PCM MEMORY ERROR Honda Passport II

Testing & Diagnostics ~2528 words
  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Replace PCM. After repair is completed, repeat OBD system check.

Diagnostic Aids

Inspect MAP sensor line for leakage or being plugged. Check for poor connection, rubbed-through wire insulation or a broken wire inside insulation at PCM and IAC motor. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, and damaged harness. Check for vacuum leak. If DTC cannot be duplicated, check scan tool FAILURE RECORDS to determine mileage since last DTC was set.

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Using scan tool, select LAST TEST FAIL. Record any other failed DTCs. If DTC P0108 is also set, diagnose DTC P0108 before proceeding. If DTC is not set, go to next step.
  3. If DTC P1111, P1115, and/or P1121 is also set, go to step 6 . If none of these DTCs are set, go to next step.
  4. Check for faulty sensor ground circuit (Gray wire on Trooper, or Green wire on all others) terminal at MAP sensor. If problem is found, go to step 9 . If no problem is found, go to next step.
  5. Check MAP signal circuit (Gray wire on 3.2L, or Gray/Black and Red wires on 3.5L) between MAP sensor harness connector and PCM for intermittent short to voltage. If a problem is found, go to step 10 . If no problem is found, go to step 8 .
  6. Check for intermittent short to voltage on 5-volt reference circuit (Blue/Orange and Green/White wires on 3.2L, or Red/Yellow and Green/White wires on 3.5L) between PCM and MAP, EGR and TP sensors. If a problem is found, go to step 10 . If no problem is found, go to next step.
  7. Check for faulty ground circuit (Green wire on VehiCROSS and 3.2L, or Green and Gray wires on all others) terminal connection at PCM. If problem is found, go to step 9 . If no problem is found, go to next step.
  8. Check for intermittent open or faulty splice in sensor ground circuit. If a problem is found, go to step 10 . If no problem is found, check for an intermittent problem. See «DIAGNOSTIC AIDS»(ref-89316-S15785988482001022800000) .
  9. Replace faulty connector terminal. Retest system.
  10. Locate and repair intermittent open/short circuit. Retest system.

Check for poor connection, rubbed-through wire insulation or a broken wire inside insulation at PCM and IAC motor. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, and damaged harness. Check for vacuum leak. If DTC cannot be duplicated, check scan tool FAILURE RECORDS to determine mileage since last DTC was set.

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Using scan tool, select LAST TEST FAIL. Record any other failed DTCs. If DTC P0107 is also set, diagnose DTC P01017 before proceeding. See «DTC P0107: MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR CIRCUIT/LOW VOLTAGE»(ref-89316-S01565152742001022800000) . If DTC is not set, go to next step.
  3. If DTC P1122 is also set, go to step 6 . If DTC is not set, go to next step.
  4. Check for faulty 5-volt reference (Blue/Orange and Green/White wires on 3.2L, or Red/Yellow and Green/White wires on 3.5L) or signal circuit (Gray wire on 3.2L, or Red wire on 3.5L) connection at MAP sensor. If a problem is found, go to step 9 . If no problem is found, go to next step.
  5. Check signal circuit (Gray wire on 3.2L, or Red and Gray/Black wires on 3.5L) between MAP sensor and PCM for intermittent open or short to ground. If problem is found, go to step 10 . If no problem is found, go to step 8 .
  6. Check for intermittent short to ground on 5-volt reference circuit (Blue/Orange and Green/White wires on 3.2L, or Red/Yellow and Green/White wires on 3.5L) between PCM and EGR valve, MAP and TP sensors. If a problem is found, go to step 10 . If no problem is found, go to next step.
  7. Check for faulty 5-volt reference circuit (Blue/Orange and Green/White wires on 3.2L, or Red/Yellow and Green/White wires on 3.5L) connection at PCM. If faulty connection is found, go to step 9 . If connection is okay, go to next step.
  8. Check for intermittent open or faulty splice in 5-volt reference circuit (Blue/Orange and Green/White wires on 3.2L, or Red/Yellow and Green/White wires on 3.5L). If a problem is found, go to step 10 . If no problem is found, check for an intermittent problem. See «DIAGNOSTIC AIDS»(ref-89316-S27963355092001022800000) .
  9. Replace faulty connector terminal(s). Retest system.
  10. Repair circuit as necessary. Retest system.

Check for poor connection, rubbed-through wire insulation or a broken wire inside insulation at PCM and IAC motor. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, and damaged harness. Check for vacuum leak. If DTC cannot be duplicated, check scan tool FAILURE RECORDS to determine mileage since last DTC was set.

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Using scan tool, select LAST TEST FAIL. Record any other failed DTCs. If DTC P0113 is also set, diagnose DTC P0113 before proceeding. See «DTC P0113: INTAKE AIR TEMPERATURE (IAT) CIRCUIT/HIGH VOLTAGE»(ref-89316-S08111127232001022800000) . If DTC is not set, go to next step.
  3. If DTC P1106, P1115, and/or P1121 is also set, go to step 6 . If none of these DTCs are set, go to next step.
  4. Check for faulty sensor ground circuit (Green wire) terminal at IAT sensor. If problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  5. Check for faulty signal circuit (Yellow/Green wire) connection at IAT sensor. If faulty connection is found, repair as necessary. Retest system. If connection is okay, go to next step.
  6. Check IAT signal circuit (Yellow/Green wire) between IAT sensor harness connector and PCM for intermittent open. If open is found, repair as necessary. Retest system. If no open is found, go to next step.
  7. Check IAT signal circuit (Yellow/Green wire) between IAT sensor harness connector and PCM for intermittent short to voltage. If short to voltage is found, repair as necessary. Retest system. If no short to voltage is found, go to next step.
  8. Check for faulty ground circuit (Green wire) terminal connection at PCM. If problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  9. Check for intermittent open or faulty splice in sensor ground circuit (Green wire). If a problem is found, repair as necessary. Retest system. If no problem is found, check for an intermittent problem. See «DIAGNOSTIC AIDS»(ref-89316-S08616719272001022800000) .

Check for poor connection, rubbed-through wire insulation or a broken wire inside insulation at PCM and IAC motor. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, and damaged harness. Check for vacuum leak. If DTC cannot be duplicated, check scan tool FAILURE RECORDS to determine mileage since last DTC was set.

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. If DTC P0112 is also set, diagnose DTC P0112 before proceeding. See «DTC P0112: INTAKE AIR TEMPERATURE (IAT) CIRCUIT/LOW VOLTAGE»(ref-89316-S06632162742001022800000) . If DTC is not set, go to next step.
  3. Check IAT signal circuit (Yellow/Green wire) between IAT sensor harness connector and PCM for intermittent short to ground. If short to ground is found, repair as necessary. Retest system. If no short to ground is found, check for an intermittent problem. See «DIAGNOSTIC AIDS»(ref-89316-S03631176952001022800000) .

Check for poor connection, rubbed-through wire insulation or a broken wire inside insulation at PCM and IAC motor. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, and damaged harness. Check for vacuum leak. If DTC cannot be duplicated, check scan tool FAILURE RECORDS to determine mileage since last DTC was set.

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. If DTC P0117 is also set, diagnose DTC P0117 before proceeding. See «DTC P0117: ENGINE COOLANT TEMPERATURE (ECT) CIRCUIT/LOW VOLTAGE»(ref-89316-S21955302532001022800000) . If DTC is not set, go to next step.
  3. Check ECT signal circuit (Blue/Red wire) between ECT sensor harness connector and PCM for intermittent short to ground. If short to ground is found, repair as necessary. Retest system. If no short to ground is found, check for an intermittent problem. See «DIAGNOSTIC AIDS»(ref-89316-S02848467452001022800000) .

Check for poor connection, rubbed-through wire insulation or a broken wire inside insulation at PCM and IAC motor. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, and damaged harness. Check for vacuum leak. If DTC cannot be duplicated, check scan tool FAILURE RECORDS to determine mileage since last DTC was set.

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. If DTC P0118 is also set, diagnose DTC P0118 before proceeding. See «DTC P0118: ENGINE COOLANT TEMPERATURE (ECT) CIRCUIT/HIGH VOLTAGE»(ref-89316-S15057820702001022800000) . If DTC is not set, go to next step.
  3. If DTC P1106, P1111, and/or P1121 is also set, go to step 8 . If none of these DTCs are set, go to next step.
  4. Check for faulty sensor ground circuit (Blue/Yellow wire on 3.2L, or Green wire on 3.5L) terminal at ECT sensor. If problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  5. Check for faulty signal circuit (Blue/Red wire) connection at ECT sensor. If faulty connection is found, repair as necessary. Retest system. If connection is okay, go to next step.
  6. Check ECT signal circuit (Blue/Red wire) between ECT sensor harness connector and PCM for intermittent open. If open is found, repair as necessary. Retest system. If no open is found, go to next step.
  7. Check ECT signal circuit (Blue/Red wire) between ECT sensor harness connector and PCM for intermittent short to voltage. If short to voltage is found, repair as necessary. Retest system. If no short to voltage is found, go to next step.
  8. Check for faulty ground circuit (Green wire on VehiCROSS and 3.2L, or Gray wire on all others) terminal connection at PCM. If problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  9. Check for intermittent open or faulty splice in sensor ground circuit. If a problem is found, repair as necessary. Retest system. If no problem is found, check for an intermittent problem. See «DIAGNOSTIC AIDS»(ref-89316-S31214760212001022800000) .

Check for poor connection, rubbed-through wire insulation or a broken wire inside insulation at PCM and IAC motor. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, and damaged harness. Check for vacuum leak. If DTC cannot be duplicated, check scan tool FAILURE RECORDS to determine mileage since last DTC was set.

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. If DTC P0123 is also set, diagnose DTC P0123 before proceeding. See «DTC P0123: THROTTLE POSITION (TP) SENSOR CIRCUIT/LOW VOLTAGE»(ref-89316-S14814985622001022800000) . If DTC is not set, go to next step.
  3. If DTC P1106, P1111, and/or P1115 is also set, go to step 6 . If none of these DTCs are set, go to next step.
  4. Check for faulty sensor ground circuit (Green wire) terminal at TP sensor. If problem is found, go to step 9 . If no problem is found, go to next step.
  5. Check TP signal circuit (Blue wire) between TP sensor harness connector and PCM for intermittent short to voltage. If a problem is found, go to step 10 . If no problem is found, go to step 8 .
  6. Check for intermittent short to voltage on 5-volt reference circuit (Red wire) between PCM and MAP, EGR and TP sensors. If a problem is found, go to step 10 . If no problem is found, go to next step.
  7. Check for faulty ground circuit (Green wire) terminal connection at PCM. If problem is found, go to step 9 . If no problem is found, go to next step.
  8. Check for intermittent open or faulty splice in sensor ground circuit (Green wire). If a problem is found, go to step 10 . If no problem is found, check for an intermittent problem. See «DIAGNOSTIC AIDS»(ref-89316-S01431497392001022800000) .
  9. Replace faulty connector terminal. Retest system.
  10. Locate and repair intermittent open/short circuit. Retest system.

Check for poor connection, rubbed-through wire insulation or a broken wire inside insulation at PCM and IAC motor. Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wire connection, and damaged harness. Check for vacuum leak. If DTC cannot be duplicated, check scan tool FAILURE RECORDS to determine mileage since last DTC was set.

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. If DTC P0122 is also set, diagnose DTC P0122 before proceeding. See «DTC P0122: THROTTLE POSITION (TP) SENSOR CIRCUIT/LOW VOLTAGE»(ref-89316-S28411131062001022800000) . If DTC is not set, go to next step.
  3. If DTC P1107 is also set, go to step 6 . If DTC is not set, go to next step.
  4. Check for faulty 5-volt reference (Red wire) or signal circuit (Blue wire) connection at TP sensor. If a problem is found, go to step 9 . If no problem is found, go to next step.
  5. Check TP sensor signal circuit (Blue wire) between TP sensor and PCM for intermittent open or short to ground. If problem is found, go to step 10 . If no problem is found, go to step 8 .
  6. Check for intermittent short to ground on 5-volt reference circuit (Red wire) between PCM and EGR valve, MAP and TP sensors. If a problem is found, go to step 10 . If no problem is found, go to next step.
  7. Check for faulty 5-volt reference circuit (Red wire) connection at PCM. If faulty connection is found, go to step 9 . If connection is okay, go to next step.
  8. Check for intermittent open or faulty splice in 5-volt reference circuit (Red wire). If a problem is found, go to step 10 . If no problem is found, check for an intermittent problem. See «DIAGNOSTIC AIDS»(ref-89316-S04163574492001022800000) .
  9. Replace faulty connector terminal(s). Retest system.
  10. Repair circuit as necessary. Retest system.

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