QT1 CARRY OUT DATA LINK DIAGNOSTICS TEST
| WARNING | THIS VEHICLE IS EQUIPPED WITH HIGH VOLTAGE CABLES, COMPONENTS, AND WIRING. THE HIGH VOLTAGE WARNING LABELS CONTAINING THE HIGH VOLTAGE SYMBOL ARE LOCATED ON EACH HIGH VOLTAGE COMPONENT. HIGH VOLTAGE CABLES, AND WIRING ARE ORANGE IN COLOR. CERTIFIED RUBBER INSULATING GLOVES AND A FACE SHIELD MUST BE WORN WHEN WORKING WITH THE HIGH VOLTAGE CABLES, COMPONENTS, OR WIRING. THE IGNITION KEY MUST BE CYCLED TO THE OFF POSITION FOR A MINIMUM OF 5 MINUTES, AND THE HIGH VOLTAGE TRACTION BATTERY SERVICE DISCONNECT PLUG PLACED IN THE SERVICING/SHIPPING POSITION BEFORE DISCONNECTING THE HIGH VOLTAGE CABLES. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY OR DEATH. DO NOT DISCONNECT, DISABLE, OR TOUCH THE HIGH VOLTAGE CABLES, COMPONENTS, OR WIRING DURING THE MODULE REPROGRAMMING PROCEDURE BECAUSE HIGH VOLTAGE IS PRESENT. THE HIGH VOLTAGE WARNING LABELS CONTAINING THE HIGH VOLTAGE SYMBOL ARE LOCATED ON EACH HIGH VOLTAGE COMPONENT. HIGH VOLTAGE CABLES, AND WIRING ARE ORANGE IN COLOR. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY OR DEATH. |
- Carry out all safety steps required to run the vehicle tests.
- Complete preliminary checks looking for obvious concerns that may relate to the symptom. Check items such as those listed: Related electrical connectors or fuses Vacuum lines (leaks, routing) Air intake system (leaks, restrictions) Fuel quality (octane, contamination, winter/summer blend) Engine cooling system (engine operating at proper temperature) Motor electronics cooling system
- Access any related TSB information.
- Carry out the data link diagnostics test.
Note. If the diagnostic tool being used does not support the data link diagnostics test, an alternative method is to attempt communication with each module on the CAN link.
Does the data link diagnostics test pass?
| Yes | No |
|---|---|
| GO to Quick Test QT2 . | If only the PCM and/or TCM have a communication concern: GO to Pinpoint Test QA . All others: Go to MODULE COMMUNICATIONS NETWORK - ESCAPE & MARINER , to diagnose the network concern. |
QT2 CARRY OUT THE PCM AND TCM QUICK TEST
Note. If unable to access the diagnostic trouble codes (DTCs), GO to Pinpoint Test QA . For additional information on retrieving malfunction indicator lamp (MIL) and non-MIL DTCs, refer to QUICK TEST .
Note. Do not carry out consecutive quick tests without turning the key to OFF position for a minimum of 15 seconds.
- Complete the PCM quick test to access any DTCs. Note any key on engine off (KOEO), key on engine running (KOER) (if engine runs) and continuous memory (MIL and non-MIL) DTCs.
- Complete the TCM quick test to access any DTCs. Note any KOEO and continuous memory DTCs.
Are any PCM or TCM DTCs present?
| Yes | No |
|---|---|
| If DTC P0106, P1A0C, P2004, P2195 or P2279 is retrieved and the engine runs rough or backfires, check the positive crankcase ventilation (PCV) system for damage, leaks, cracks or a disconnected PCV valve or hose. Repair as necessary. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS for direction to repair any DTCs after noting the following: REPAIR DTCs in the following order (for each mode, begin diagnosis with the first DTC output). Any PCM KOEO DTCs Any PCM KOER DTCs Any TCM KOEO DTCs Any PCM continuous memory DTCs (retrieve any available freeze frame data and disregard any identical/related continuous DTCs or DTCs already repaired). Any TCM continuous memory DTCs (retrieve any available freeze frame data and disregard any identical/related continuous DTCs or DTCs already repaired). | GO to STEP 2: NO DIAGNOSTIC TROUBLE CODE (DTC) PRESENT SYMPTOM CHART INDEX for direction to the appropriate STEP 3 Symptom Chart. NOTE: If the symptom is not listed, REFER to the applicable repair information article or GO to Pinpoint Test Z (for intermittent PCM or TCM system diagnostics). |
| NOTE |
|---|
| If the symptom is not listed, REFER to the applicable repair information article or GO to Pinpoint Test Z (for intermittent PCM or TCM system diagnostics). |
Step 2: No Diagnostic Trouble Code (DTC) Present Symptom Chart Index
| System/Symptom | Chart Number | |
|---|---|---|
| Engine/Vehicle Starting Concerns | No Start/Vehicle Disabled | CHART 2 |
| No Start/Normal Crank | CHART 3 | |
| Unique Idle Concerns | Rolling Idle | CHART 1 |
DRIVEABILITY
| System/Symptom | Chart Number | |
|---|---|---|
| Vehicle Stalls/Quits | Idle, Acceleration, Cruise | CHART 1 |
| Engine Runs Rough | CHART 1 | |
| Engine Misses | CHART 1 | |
| Vehicle Buck/Jerk | CHART 1 | |
| Vehicle Hesitation/Stumble | CHART 1 | |
| Vehicle Surge | CHART 1 | |
| Engine Backfires | CHART NUMBER: 4 | |
| Vehicle Lack/Loss of Power | CHART NUMBER: 5 | |
| Engine Spark Knock | CHART NUMBER: 6 | |
DRIVEABILITY - PERFORMANCE WHILE DRIVING CONCERNS
| System/Symptom | Chart Number |
|---|---|
| Poor Fuel Economy | CHART NUMBER: 7 |
| Emissions Compliance | CHART NUMBER: 8 |
ADDITIONAL DRIVEABILITY CONCERNS
| System/Symptom | Chart Number | |
|---|---|---|
| Warning Indicators | Malfunction Indicator Lamp (MIL) | CHART NUMBER: 9 |
| Hazard Indicator Lamp | CHART NUMBER: 9 | |
| Caution Indicator Lamp | CHART NUMBER: 9 | |
| Temperature Warning Indicator Lamp | CHART NUMBER: 9 | |
| Check Fuel Cap Indicator Lamp | CHART NUMBER: 9 | |
| Climate Control | Lack of A/C cooling, A/C not functioning | CHART NUMBER: 16 |
| A/C always on, A/C compressor runs continuously | CHART NUMBER: 16 | |
ELECTRICAL
| System/Symptom | Chart Number | |
|---|---|---|
| Oil System Concerns | High Oil Consumption | CHART NUMBER: 10 |
| Leaks | CHART NUMBER: 10 | |
| Cooling System Concerns | Electric engine cooling fan(s) does not operate (low, medium and/or high speed) | CHART NUMBER: 11 |
| Electric engine cooling fan(s) always runs | CHART NUMBER: 12 | |
| Exhaust System Concerns | Visible smoke | CHART NUMBER: 13 |
| Odor (sulfur or rotten egg smell) | CHART NUMBER: 17 | |
| Fuel System Concerns | Fuel odor, engine compartment | CHART NUMBER: 14 |
| Engine Noise (Under Hood) | CHART NUMBER: 15 | |
ENGINE
See also:
• QA