DTC P0108:00 [MZR-CD 2.2]

id0102f3701200

DTC P0108:00

Boost sensor circuit high input

DETECTION CONDITION

•  The PCM monitors the input signal from the boost sensor. If the voltage from the boost sensor is more than 4.2 V, the PCM determines that there is a malfunction in the boost sensor circuit.

Monitoring condition

•  Battery voltage: 8—20 V

Diagnostic support note

•  The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle.

•  PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA (mode2) and snapshot data are available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Boost sensor connector or terminal malfunction

•  Short to power supply in wiring harness between boost sensor terminal C and PCM terminal 1CL

•  Short to power supply in wiring harness between boost sensor terminal B and PCM terminal 1AY

•  Boost sensor malfunction

•  PCM connector or terminal malfunction

•  Open circuit in wiring harness between boost sensor terminal A and PCM terminal 1AI

•  PCM malfunction

DTC P0108:00	Boost sensor circuit high input
DETECTION CONDITION	• The PCM monitors the input signal from the boost sensor. If the voltage from the boost sensor is more than 4.2 V, the PCM determines that there is a malfunction in the boost sensor circuit. Monitoring condition • Battery voltage: 8—20 V Diagnostic support note • The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA (mode2) and snapshot data are available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Boost sensor connector or terminal malfunction • Short to power supply in wiring harness between boost sensor terminal C and PCM terminal 1CL • Short to power supply in wiring harness between boost sensor terminal B and PCM terminal 1AY • Boost sensor malfunction • PCM connector or terminal malfunction • Open circuit in wiring harness between boost sensor terminal A and PCM terminal 1AI • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE2) OR SNAPSHOT DATA HAVE BEEN RECORDED • Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (mode2) and snapshot data on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform the repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT? • Connect the M-MDS to the DLC-2. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Is the PENDING CODE for this DTC present?	Yes	Go to the next step.
3		No	Intermittent concern exists. Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”. (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD 2.2].)
4	INSPECT BOOST SENSOR CONNECTOR FOR POOR CONNECTION • Switch the ignition to off. • Disconnect the boost sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 10.
4		No	Go to the next step.
5	INSPECT BOOST SENSOR POWER CIRCUIT FOR SHORT TO POWER • Switch the ignition to off. • Measure the voltage between the boost sensor terminal C and body ground. • Is the voltage B+?	Yes	Repair or replace the wiring harness for a short to power, then go to Step 10.
5		No	Go to the next step.
6	INSPECT BOOST SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Switch the ignition to ON (Engine off). • Measure the voltage between the boost sensor terminal B and body ground. • Is the voltage more than 4.2 V?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 10.
6		No	Go to the next step.
7	INSPECT BOOST SENSOR • Switch the ignition to off. • Inspect the boost sensor. (See BOOST SENSOR INSPECTION [MZR-CD 2.2].) • Is there any malfunction?	Yes	Replace the boost sensor, then go to Step 10. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
7		No	Go to the next step.
8	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Switch the ignition to off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 10.
8		No	Go to the next step.
9	INSPECT BOOST SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT • Switch the ignition to off. • Inspect for continuity between boost sensor terminal A and PCM terminal 1AI. • Is there continuity?	Yes	Go to the next step.
9		No	Repair or replace the wiring harness for an open circuit, then go to the next step.
10	VERIFY TROUBLESHOOTING OF DTC P0108:00 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD 2.2].)
11		No	DTC troubleshooting completed.