Circuit Test VSS - Vehicle Speed Sensor
| Circuit | 4EAT Pin | ECA Pin | Wire Color | |||
|---|---|---|---|---|---|---|
| 1.8L | ||||||
| GND | 2L | (1) | Blue | |||
| VSS | 1L | (1) | Green | |||
| 2.2L Non-Turbo | ||||||
| GND | (1) | 3A | Black | |||
| VSS | (1) | 1M | Green/Red | |||
| 2.2L Turbo | ||||||
| GND | (1) | (1) | Black/Green | |||
| VSS | 1P | (1) | Green/Red | |||
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1) Checking System Integrity Visually check all wiring, connectors and components for evidence of damage, shorting or looseness. If fault is found, repair as necessary. If no fault is found, go to next step.
2) Checking VSS Input Signal Turn ignition off. On 2.2L non-turbo, disconnect ECA connector. On all other models, disconnect 4EAT control module connectors. 4EAT control module is located behind left side of instrument panel. If VSS is located on speedometer drive gear, remove drive gear from transaxle, leaving wiring harness connected. If VSS is located on instrument cluster, disconnect speedometer cable from transaxle. Measure continuity between VSS and GND terminals while rotating speedometer cable or drive gear. See CIRCUIT PIN IDENTIFICATION (VSS) . Go to next step.
3) Continuity should exist 4 (2.2L) or 8 (1.8L) times per speedometer cable revolution. If continuity is as specified, VSS circuit is okay. Replace ECA (2.2L non-turbo) or 4EAT module (all others). On 2.2L with analog instrument cluster, if continuity is not as specified, go to next step. On all other models, if continuity is not as specified, go to step 7).
4) Disconnect instrument cluster connectors. With speedometer cable disconnected from transaxle, rotate speedometer cable. Measure continuity between speed sensor VSS terminal and GND terminal. See Fig 1 . Continuity should exist 4 times per speedometer cable revolution. If continuity is as specified, go to next step. If continuity is not as specified, go to step 6).
5) If continuity is as specified and speedometer is working, repair VSS or GND circuit between VSS sensor and 4EAT module (ECA on 2.2L non-turbo). If continuity is as specified, but speedometer is NOT working, check speedometer drive gear. If drive gear is okay, repair VSS or GND circuit between VSS sensor and 4EAT module (ECA on 2.2L non-turbo).
6) If continuity is not as specified, but speedometer is working, replace speedometer head and/or printed circuit board. If continuity is not as specified and speedometer is NOT working, check speedometer cable. If cable is okay, replace speedometer head and/or printed circuit board.
7) Disconnect VSS connector at transaxle. Remove VSS from transaxle. Rotate speedometer drive gear, and measure continuity between VSS and GND terminals of VSS. Continuity should exist 4 times per speedometer drive gear revolution (8 times per revolution on 1.8L). If continuity is not as specified, go to step 9). If continuity is as specified, go to next step.
8) On 1.8L, repair VSS or GND circuit. On 2.2L, if continuity is as specified and speedometer is working, repair VSS or GND circuit. If continuity is as specified, but speedometer is NOT working, check speedometer drive gear. If drive gear is okay, repair VSS or GND circuit.
9) On 1.8L, replace VSS or speedometer drive gear. On 2.2L, if continuity is not as specified, but speedometer is working, replace instrument cluster. If continuity is not as specified and speedometer is NOT working, check wiring to instrument cluster. If wiring is okay, replace instrument cluster.