Component Tests and General Diagnostics
POWERTRAIN CONTROL MODULE (PCM) INSPECTION
CAUTION:The PCM terminal voltages vary with change in measuring conditions and vehicle conditions. Always carry out a total inspection of the input systems, output systems, and PCM to determine the cause of trouble. Otherwise, a wrong diagnosis will be made.
Using SST (104 Pin Breakout Box and PCM Adaptor)
1. Disconnect the battery. See Procedures.
2. Disconnect the PCM connectors.
3. Connect the 104 Pin Breakout Box and the PCM adaptor SST to the PCM.
4. Connect the battery.
5. Measure the voltage at each terminal.
6. If any incorrect voltage is detected, check related systems, wiring harnesses and connectors referring to the possible malfunction in the terminal voltage list.
Using the SST (IDS or equivalent tester)
1. In the passenger compartment, connect the IDS or equivalent scan tool SST to the data link connector.
2.
CAUTION:The "PID/DATA MONITOR AND RECORD" function is to monitor the calculation value of the input/output signals in the PCM. Deviation in the value does not always indicate malfunction in the related devices. For inspection of the input/output signals other than in the link monitor table, check voltage at the applicable PCM terminal by using the 104 Pin Breakout Box.Carry out inspection referring to PID/DATA MONITOR table.
3. If normal output signal cannot be detected when all input signals are normal, replace the PCM. See Service and Repair.
PID/DATA MONITOR ITEM TABLE
NOTE:The following PIDs may display on the IDS or equivalent tester, but they are not used for inspection, because the devices are not applied for in this model.
PID/DATA Monitor Item Table (Part 1):
PID/DATA Monitor Item Table (Part 2):
PID/DATA Monitor Item Table (Part 3):
NOTE:Footnotes are referenced throughout the Typical Diagnostic Reference Value Charts. A letter in parentheses next to a value indicates supplemental information is applicable.
An attempt is made to provide as much information as possible; some vehicles may not display all input and output signals.
Reference values may vary 20% depending on operating conditions, altitude, and other factors. RPM values are axle and tire dependent.
Values are taken at an altitude of approximately Meters 55.7 (600 ft) above sea level.
1 A/C on.
2 Cooling fan on (single, low or high speed).
3 Heated oxygen sensors (HO2S) should switch from rich to lean at least once every 3 seconds. HO2S voltage should toggle above and below 0.450 DCV and never be a negative value. Valid HO2S switching occurs only during closed loop fuel control operation.
4 Downstream HO2S(s) stay close to a constant voltage when the catalyst monitor is off (positive value only). When the catalyst monitor is on, the HO2S switches rich to lean above and below 0.450 DCV and never be a negative value. For downstream HO2S(s) greater activity results when the catalyst monitor is active.
5 Brake pedal applied.
6 The electric vapor management valve (VMV) commanded current varies from 0 mA - 1000 mA depending on the PCM command to purge the EVAP system.
7 While pressing the transmission control switch (TCS) or switching to manual drive mode.
8 Value is dependent on fuel tank level. Typical operating range is 15% (empty) to 90% (full).
9 Steering wheel turned.
10 Clutch pedal applied.
11 Value is dependent upon ambient air temperature and may fall outside of range.
12 Value is not useful under this condition.
13 May change state under this condition.
14 Canister vent duty cycles to 100% (close) when EVAP monitor test is running.
15 EGR voltage and duty cycle will vary from 0-VBAT or 0-100% depending on EGR demand.
16 Value may vary 20% depending on altitude, operating conditions, weather, and other factors.
2.3L Engine
Sensors/Inputs
Actuators/Outputs
Other
4.0L Engine
Sensors/Inputs
Actuators/Outputs
Other
