Section 10.2
Troubleshooting PID 105
The following procedures will troubleshoot PID 105.
Section 10.2.1
105 03 – Intake Air Temperature Sensor Open Circuit
Perform the following steps to troubleshoot an IAT sensor open circuit fault:
- With boost air combination sensor connected, check for additional active fault codes. See Figure
"Turbo Boost Air Combination Sensor"
.
- If fault code 102 03 is active in addition to 105 03, repair open circuit in 55-pin connector wire 21 (on MBE 900 — see Figure
"Turbo Boost Air Combination Sensor Wiring for MBE 900 Engine"
) or wire 29 (on MBE 4000 — see Figure
"Turbo Boost Air Combination Sensor Wiring for MBE 4000 Engine"
) to pin 1 of the sensor. Erase fault code memory.
Figure 1. Turbo Boost Air Combination Sensor Wiring for MBE 900 Engine
Figure 2. Turbo Boost Air Combination Sensor Wiring for MBE 4000 Engine
- If fault code 110 03 is active in addition to 105 03, go to step 2 .
- If only fault code 105 03 is active, go to step 3 .
- If fault code 102 03 is active in addition to 105 03, repair open circuit in 55-pin connector wire 21 (on MBE 900 — see Figure
"Turbo Boost Air Combination Sensor Wiring for MBE 900 Engine"
) or wire 29 (on MBE 4000 — see Figure
"Turbo Boost Air Combination Sensor Wiring for MBE 4000 Engine"
) to pin 1 of the sensor. Erase fault code memory.
- Measure the voltage at pin 2 of the combination sensor. See Figure
"Turbo Boost Air Combination Sensor"
.
- If more than 10 V, repair short to vehicle system power in 55-pin connector wire 48 (on the MBE 900 — see Figure "Turbo Boost Air Combination Sensor Wiring for MBE 900 Engine" ) or wire 7 (on the MBE 4000 — see Figure "Turbo Boost Air Combination Sensor Wiring for MBE 4000 Engine" ) to pin 2 of the sensor. Erase fault code memory.
- If less than 10 V, go to step 5 .
- Bridge pins 1 and 2 of the combination sensor. See Figure
"Turbo Boost Air Combination Sensor"
.
- If new fault code 105 04 is not active, repair open circuit in 55-pin connector wire 48 (on the MBE 900 — see Figure "Turbo Boost Air Combination Sensor Wiring for MBE 900 Engine" ) or wire 7 (on the MBE 4000 — see Figure "Turbo Boost Air Combination Sensor Wiring for MBE 4000 Engine" ) to pin 2 of the sensor. Erase fault code memory.
- If new fault code 105 04 is active, go to step 4 .
- Bridge pins 1 and 2 of the combination sensor on the plug side. See Figure
"Turbo Boost Air Combination Sensor"
.
- If new fault 102 04 is not active, replace the combination sensor. Erase fault code memory.
- If new fault 102 04 is active, repair short to power in 55-pin connector wire 48 (on the MBE 900 — see Figure "Turbo Boost Air Combination Sensor Wiring for MBE 900 Engine" ) or wire 7 (on the MBE 4000 — see Figure "Turbo Boost Air Combination Sensor Wiring for MBE 4000 Engine" ) to pin 2 of the sensor. Erase fault code memory.
- With combination sensor connected, measure the voltage at pin 1 of the sensor. See Figure
"Turbo Boost Air Combination Sensor"
.
- If less than 4.5 V, inspect and repair or replace all plug connectors, as required. Erase fault code memory.
- If more than 4.5 V, repair short to vehicle system power in 55-pin connector wire 34 to pin 1 of the Engine Coolant Temperature sensor. See Figure
"Engine Coolant Temperature Sensor Wiring"
. Erase fault code memory.
Figure 3. Engine Coolant Temperature Sensor Wiring
Section 10.2.2
105 04 – Intake Air Temperature Sensor Short to Ground
Perform the following steps to troubleshoot an IAT sensor short to ground fault:
- Unplug the boost air combination sensor and check for additional fault codes.
- If new fault code 105 03 is active in addition to code 105 04, replace the sensor. Erase fault code memory.
- If new fault code 105 03 is not active, go to step 2 .
- Measure the resistance between pin 2 of the combination sensor and vehicle ground. See Figure
"Turbo Boost Air Combination Sensor"
.
- If resistance is less than 30 kΩ, repair short to ground in 55-pin connector wire 48 (on the MBE 900 — see Figure "Turbo Boost Air Combination Sensor Wiring for MBE 900 Engine" ) or wire 7 (on the MBE 4000 — see Figure "Turbo Boost Air Combination Sensor Wiring for MBE 4000 Engine" ) to pin 2 of the sensor. Erase fault code memory.
- If resistance is greater than 30 kΩ, go to step 3 .
- Check and clean the sensor contacts (remove any corrosion).
- If fault 105 04 is still active after checking and cleaning, replace the PLD-MR. Erase fault code memory.
- If fault 105 04 is not active after checking and cleaning, erase fault code memory.
MBE 900/4000 Troubleshooting Guide - 6SE422 |
Generated on 10-13-2008 |