Diagnostic Test
WARNING: This page is about a different variant/trim than selected.
- CHECK FOR OTHER DTCS
- With the scan tool, read Powertrain Control Module 1 (PCM-1) DTCs and Freeze Frame Data and record on the repair order.
Are there any 5-Volt Sensor Reference Voltage or Manifold Absolute Pressure Sensor Low or High DTCs also present?
Yes
- Perform the applicable diagnostic procedure(s). Refer to DTC INDEX .
No
- Go To 2
- With the scan tool, read Powertrain Control Module 1 (PCM-1) DTCs and Freeze Frame Data and record on the repair order.
- CHECK FOR AN ACTIVE DTC
- Using the recorded Freeze Frame Data and the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
- With the scan tool, read PCM-1 DTCs.
Is the DTC active or pending?
Yes
- Go To 3
No
- Perform the INTERMITTENT DTC diagnostic procedure. Refer to INTERMITTENT CONDITION .
- CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT FOR HIGH RESISTANCE
- Turn the ignition off.
- Disconnect the Bank 1 MAP Sensor harness connector.
- Turn the ignition on.
- Measure the voltage on the (F856) 5-Volt Supply circuit at the Bank 1 MAP Sensor harness connector.
Is the voltage above 4.9 volts?
Yes
- Go To 4
No
- Repair the (F856) 5-Volt Supply circuit for an open or high resistance.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- CHECK THE (K1) MAP SIGNAL CIRCUIT FOR HIGH RESISTANCE
- Turn the ignition off.
- Disconnect the PCM-1 C2 harness connector.
- Measure the resistance of the (K1) MAP Signal circuit between the Bank 1 MAP Sensor harness connector and the PCM-1 C2 harness connector.
Is the resistance below 3.0 Ohms?
Yes
- Go To 5
No
- Repair the (K1) MAP Signal circuit for high resistance.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- CHECK THE (K900) SENSOR GROUND CIRCUIT FOR HIGH RESISTANCE
- Measure the resistance of the (K900) Sensor Ground circuit between the Bank 1 MAP Sensor harness connector and the PCM-1 C2 harness connector.
Is the resistance below 3.0 Ohms?
Yes
- Go To 6
No
- Repair the (K900) Sensor Ground circuit for high resistance.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- Measure the resistance of the (K900) Sensor Ground circuit between the Bank 1 MAP Sensor harness connector and the PCM-1 C2 harness connector.
- REPLACE BANK 1 MAP SENSOR AND RETEST FOR DTC
- Replace the Bank 1 MAP Sensor in accordance with the Service Information. Refer to SENSOR, TMAP-INTAKE MANIFOLD, REMOVAL AND INSTALLATION .
- Reconnect the PCM-1 C2 harness connector.
- Reconnect the Bank 1 MAP harness connector.
- Using the recorded Freeze Frame Data and the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
- With the scan tool, read PCM-1 DTCs.
Is the DTC active or pending?
Yes
- Go To 7
No
- Repair is complete.
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- CHECK RELATED PCM AND COMPONENT CONNECTIONS
- Perform any Service Bulletins that apply.
- Disconnect all PCM-1 harness connectors.
- Disconnect all related in-line harness connections (if equipped).
- Disconnect the related component harness connectors.
- Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
- Proper connector installation.
- Damaged connector locks.
- Corrosion.
- Other signs of water intrusion.
- Weather seal damage (if equipped).
- Bent terminals.
- Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
- Terminals that have been pushed back into the connector cavity.
- Check for spread terminals and verify proper terminal tension.
Repair any conditions that are found.
- Reconnect all PCM-1 harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
- Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
- Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
- With the scan tool, erase DTCs.
- Test drive or operate the vehicle in accordance with the when monitored and set conditions.
- With the scan tool, read DTCs.
Did the DTC return?
Yes
- Replace and program the Powertrain Control Module 1 (PCM-1) in accordance with the Service information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL AND INSTALLATION .
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
No
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- Test complete.