## Fuel and Emissions Systems

#### System Descriptions (cont'd)

11-18

ECM Inputs and Outputs at Connector B (40P)

Wire side of female terminals

Terminal No. | Wire Colour | Terminal Name | Description | Signal Condition
84 | WHT | Engine coolant temperature (ECT) sensor signal | Detects ECT sensor signal | About 0.1 V – 4.8 V with the ignition switch ON (II) (depending on ECT)
85 | GRY | Engine coolant temperature (ECT) sensor ground | Ground for the ECT sensor | 0 V at all times
86 | YEL | Rail pressure (RP) sensor signal | Detects RP sensor signal | About 1 V with the engine running at idle (depending on RP)
88 | BLK | Mass air flow (MAF) sensor ground | Ground for the MAF sensor | 0 V at all times
89 | BRN | Mass air flow (MAF) sensor signal | Detects MAF sensor signal | About 2 V – 3 V with the engine running at idle
90 | RED/YEL | Rail pressure (RP) sensor supply | Provides RP sensor | About 5 V with the ignition switch ON (II) About 0 V with the ignition switch OFF
91 | YEL/RED | Intake air temperature (IAT) sensor signal | Detects IAT sensor signal | About 0.1 V – 4.8 V with the ignition switch ON (II) (depending on IAT)
92 | BLK/RED | Rail pressure (RP) sensor ground | Ground for the RP sensor | 0 V at all times
93 | RED/BLU | Manifold absolute pressure (MAP) sensor supply | Provides MAP sensor | About 5 V with the ignition switch ON (II)
94 | YEL/RED | Manifold absolute pressure (MAP) sensor signal | Detects MAP sensor signal | About 2 V with the ignition switch ON (II) About 2 V with the engine running at idle
95 | BLK/YEL | Manifold absolute pressure (MAP) sensor ground | Ground for the MAP sensor | 0 V at all times
97 | WHT/RED | Mass air flow (MAF) sensor supply | Provides MAF sensor | About 5 V with the ignition switch ON (II)
99 | WHT/BLU | Crank position (CKP) sensor plus signal | Detects CKP sensor plus signal | Pulses signal with the engine running
100 | ORN/BLU | Crank position (CKP) sensor minus signal | Detects CKP sensor minus signal | Pulses signal with the engine running

NOTICE

- In case you measure the standard voltage of ECM, remove a connector and use the Test pin box and Test harness.
- The battery power supply short circuit to 5 V power supply damages the ECM.

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