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 CONDITIONS

―  Battery voltage: 8—20 V

Diagnostic support note

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

•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Boost sensor connector or terminals malfunction

•  Boost sensor malfunction

•  PCM connector or terminals malfunction

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

•  Boost sensor power supply circuit and signal circuit are shorted to each other.

•  Open circuit in wiring harness between the following terminals:

―  Boost sensor terminal B—PCM terminal 1AY

―  Boost sensor terminal A—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 CONDITIONS ― Battery voltage: 8—20 V Diagnostic support note • The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA (Mode 2)/Snapshot data is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Boost sensor connector or terminals malfunction • Boost sensor malfunction • PCM connector or terminals malfunction • Short to power supply in wiring harness between boost sensor terminal B and PCM terminal 1AY • Boost sensor power supply circuit and signal circuit are shorted to each other. • Open circuit in wiring harness between the following terminals: ― Boost sensor terminal B—PCM terminal 1AY ― Boost sensor terminal A—PCM terminal 1AI • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (Mode 2)/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 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 INPUT SIGNAL STATUS IS CONCERN INTERMITTENT OR CONSTANT • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Start the engine. • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [MZR-CD 2.2].) • Is the same DTC present?	Yes	Go to the next step.
3		No	Intermittent concern exists. • Perform the “INTERMITTENT CONCERN TROUBLESHOOTING” procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD 2.2].)
4	INSPECT BOOST SENSOR CONNECTOR CONDITION • 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 connector and/or terminals, then go to Step 10.
4		No	Go to the next step.
5	INSPECT BOOST SENSOR • Reconnect all disconnected connectors. • 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 COMMON RAIL REMOVAL/INSTALLATION [MZR-CD 2.2].)
5		No	Go to the next step.
6	INSPECT PCM CONNECTOR CONDITION • 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 connector and/or terminals, then go to Step 10.
6		No	Go to the next step.
7	INSPECT BOOST SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • PCM connector is disconnected. • Disconnect the boost sensor connector. • Switch the ignition to ON (engine off). • Measure the voltage at the boost sensor terminal B (wiring harness-side). • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 10.
7		No	Go to the next step.
8	INSPECT BOOST SENSOR POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT TO EACH OTHER • Boost sensor and PCM connectors are disconnected. • Switch the ignition to off. • Inspect for continuity between boost sensor terminals C and B (wiring harness-side). • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to each other, then go to Step 10.
8		No	Go to the next step.
9	INSPECT BOOST SENSOR CIRCUIT FOR OPEN CIRCUIT • Boost sensor and PCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Boost sensor terminal B—PCM terminal 1AY ― Boost sensor terminal A—PCM terminal 1AI • Is there continuity?	Yes	Go to the next step.
9		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
10	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Start the engine. • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [MZR-CD 2.2].) • Is the same 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.